ALBERT

Description: Belluigi, A.: Neue Theorie für elektrische Sondierungen . . . 113 ; Kautzleben H.: Über das geomagnetische Normalfeld nach Fanselau . . . 143 ; Buchbesprechungen: Řihánek, L. V. und Postráneckẏ, J.: Bourky a ochrana pied bleskem (H. Israёl) . . . 158 ; Künstliche Erdsatelliten (H. Dolezalek) . . . 159 ; Personalien . . . 160 ;

Description: research

Description: DFG, SUB Göttingen

Description: INHALTSVERZEICHNIS: SEITZ, K.: Altersbestimmung nach der RaD-Methode mit gasförmigen Bleiverbindungen . . . 149 ; GROTEN, E.: Untersuchung der zeitlichen Variation des Gravimeterfaktors . . . 169 ; FRIEDEMANN, H.: Von neuen Erfindungen. Ring für Seismische Seemessungen . . . 173 ; SCHUCH, M.: Beobachtungen von Eigenpotentialen an Torflagerstätten mit verschiedenartigen Elektroden . . . 175 ; Mitteilung . . . 196 ;

Description: research

Description: DGG, DFG, SUB Göttingen

Description: Kasemir, H. W.: Der Gewittergenerator im luftelektrischen Stromkreis Tl. II (S. 65) ; Repsold‚ H.: Ergebnisse der Messung natürlicher Erdströme bei Göttingen (S. 97) ; Israёl, H.: Der Diffusionskoeffizient des Radons in der Bodenluft (S. 104) ; Siebert, M.: Die solaren Gezeiten im Barogramm des Juli 1959 (S. 109).

Description: research

Description: DFG, SUB Göttingen

Description: INHALTSVERZEICHNIS: Angenheister, G. und v. Consbruch C.: Pulsation des erdmagnetischen Feldes in Göttingen von 19531-1958 . . . 103 ; Fritsch, V.: Die geoelektrische Untersuchung der Heilwässer in der Umgebung des Neusiedlersees im Burgenland . . . 112 ; Schneider, G.: Mikroseismik-Ausbreitung in Nord- und Mitteleuropa . . . 118 ; Frölich, F.‚ Stiller, H. und Wagner, F. Ch: Erfahrungen mit Laborverfahren für Gesteinsuntersuchungen . . . 136 ; Druckfehlerberichtigung . . . 149 ;

Description: research

Description: DGG, DFG, SUB Göttingen

Description: Korschunow, A: Tiefherdbeben aus Göttinger Seismogrammen . . . 113 ; Belluigi, A: Über ein geoelektrisches inverses Problem . . . 135 ; Berckhemer, H.‚ Oliver, J.: Zur Deutung seismischer Einsätze mit parallelen Laufzeitkurven . . . 152 ; Dohr, C.: Perioden der ersten Vorläufer in Göttinger Seismogrammen . . . 165 ; Buchbesprechung . . . 175 ;

Description: research

Description: DGG, DFG, SUB Göttingen

Description: SCHULT, A. and M. SCHOBER: Measurement of electrical conductivity of natural olivine at temperatures up to 950 °C and pressures up to 42 kbar . . . 105 ; STROBACH, K.: Über die Natur der elastischen Wellen der Seegangs-Mikroseismik . . . 113 ; FUCHS, K: On the properties of deep crustal reflectors . . . 133 ; VOPPEL, D.: Ein Spulentheodolit zur Messung der erdmagnetischen Komponenten mit dem Protonenmagnetometer . . . 151 ; FRITSCH, V. und A. F. TAUBER: Geoelektrische Untersuchungen von Salzwasservorkommen . . . 161 ; BEHRENS, J. und L. DRESEN: Eine Möglichkeit zur Laufzeitbestimmung reflektierter Wellen im Bereich der kritischen Entfernung . . . 175 ; WEIDELT, P.: Zur Tiefenlage und Größe des Dichtemaximums der induzierten Erdströme . . . 191 ; Briefe an den Herausgeber: ISRAËL, H., und N. NIX: Ein neues Verfahren zur Untersuchung von Kondensation und Verdampfung an Einzelteilchen von Kleinaerosolen . . . 207 ; ROSE‚ G. und H. U. WIDDEL: Zur Möglichkeit des direkten Nachweises vertikaler Luftbewegungen im Höhenbereich 75 - 80km . . . 211 ; Buchbesprechungen . . . 213

Description: research

Description: DGG, DFG, SUB Göttingen

Description: INHALTSVERZEICHNIS: SIEDLER, G.: Zum Mechanismus des Wasseraustausches zwischen dem Roten Meer und dem Golf von Aden ; JACOBY, W.: Schweremessungen auf Helgoland - Auswertung mit Ausgleichsverfahren ; PÍCHA, J .: Einige Ergebnisse der Erdgezeitenbeobachtungen in der ČSSR ; TOMCZAK, M.‚ jun.: Über winderzeugte interne Wellen ; HIRSCHLEBER, H. B. und H. MENZEL: Das Amplituden-Ladungs-Gesetz für Sprengungen im Kleinen Belt ; GUTDEUTSCH, R.: Modellseismische Experimente über die Ausbreitung von Rayleighwellen an keilförmigen Schichten ; SCHNEIDER, G., SCHICK, R. and H. BERCKHEMER: Fault-plane Solutions of Earthquakes in Baden-Württemberg ; JAESCHKE, R.: Upper Atmosphere Winds Deduced from Vapour Trail Drifts ; RAWER, K.: Ionosphären-Messungen bei zwei Raketen-Aufstiegen in der Sahara ; MÜHLEISEN, R.: Sferiks von ozeanischen Gewittern und luftelektrische Feldstärke über dem Atlantik während der Expedition 1965 des deutschen Forschungsschiffes „Meteor“ ; STEVELlNG, E.: Erdmagnetische Tiefensondierung mit 9 gleichzeitig registrierenden Pulsationsstationen zwischen Göttingen und Goslar ; VOELKER, H.: Beobachtungen von pt’s auf einer Stationskette von Nordskandinavien bis Deutschland ; ZÜRN, V.: Statistische Untersuchungen über langperiodische Pulsationen des erdmagnetischen Feldes ; SAXOV, S. and N. ABRAHAMSEN: Some Geophysical Investigations in the Faroe Islands ; SEIDL, D., MÜLLER, ST. und L. KNOPOFF: Dispersion von Rayleigh-Wellen in Südwestdeutschland und in den Alpen ; WANIEK‚ L. und V. SCHENK: Modellseismischer Beitrag zur Deutung des Krustenaufbaues in der bayerischen Molasse ; GIESE, P.: Neue Gesichtspunkte zur Gliederung der Erdkruste auf Grund refraktionsseismischer Messungen ; BERKTOLD, A.: Erste Auswertung von Messungen des zeitlich variablen erdmagnetischen Feldes entlang eines Profiles vom Oberpfälzer Wald bis zu den Kitzbüheler Alpen ; SENGPIEL, K.-P.: Das induzierte erdelektrische Feld, beobachtet längs zweier Profile durch die bayerische Molasse ; LATKA, R.: Modellrechnungen zur Induktion im elektrisch leitfähigen Untergrund ; FRITSCH, V.: Geoelektrische Probleme der elektrischen Bodenverfestigung ; SCHOPPER, J. R.: Untersuchungen über elektrische und hydraulische Eigenschaften poröser Gesteine ; SOFFEL, H. und N. PETERSEN: Druckabhängigkeit der magnetischen Bereichsstrukturen von natürlichem Magnetit ; RAMMNER, R.: Ausgewählte Beispiele geoelektrischer Meßtätigkeit ; DAVID, E.: Großmeteoriteneinschläge und Tektite ;

Description: research

Description: DGG, DFG, SUB Göttingen

Description: INHALTSVERZEICHNIS: Linke O., Chr.-U. Wagner: Die dynamischen Gleichungen in der Magnetosphäre II . . . 257 ; Prakash Prem: A residual method . . . 275 ; Homilius J.. Über die Auswertung geoelektrischer Sondierungskurven im Falle eines vielfach geschichteten Untergrundes . . . 282 ; Coroniti S. C.‚ H. Dolezalek, H. Israël: On the Electrical Feature of the Upper Stratosphere of Mesosphere . . . 301 ;

Description: research

Description: DGG, DFG, SUB Göttingen

Description: Inhalt: Bisztricsány, E.: On the problem of magnitude determination. ; Förtsch, O.: Ergebnisse seismischer Untersuchungen auf Gletschern der Ostalpen. ; Richter, G.: Über die Polarisation von SKS. ; Stefanescu, S. S.: Über die magnetische Wirkung einiger heterogener Medien in der elektrischen Bodenforschung. ; Vogler, G.: Die Grenzen der Anwendung von Erdungsmessern für Aufgaben in der angewandten Geophysik. ; Barta, G.: Über die Säkularbewegung des magnetischen Zentrums und der magnetischen Pole der Erde. ; Kertz, W.: Tages- und jahreszeitliche Variationen des erdmagnetischen äquatorialen Ringstromes. ; Schmucker, U.: Einige Ergebnisse der erdmagnetischen Tiefensondierung in Norddeutschland. ; Volland, H.: Modelle erdmagnetisch induzierter Ströme im inhomogenen Erdinnern. ; Frölich, F.: Zur magnetischen Stabilität von Erdkrustengesteinen. ; Luck, O.: Über den physikalischen Zustand der Materie im Erdinnern, ; Egyed, L. and Stegena, L.: Physical background of a dynamical Earth model, ; Dolezalek, H.: Die Problematik luftelektrisch-synoptischer Betrachtung. ; Israël, H.: Die luftelektrische Unruhe. ; Lucke, O. & Sparrer, H.: Die Gerätekonstante des elektrodynamischen Theodoliten des VEB WTBG, Berlin und die Vermessung der Primärspule mit dem Meßgerät des VEB Carl Zeiß, Jena. ; Reusche, H.-G.: Ein absoluter magnetischer Theodolit. ; Verö, J.: Über einige Ergebnisse des Erdstrom-Observatoriums bei Nagycenk in Ungarn. ; Schulze, R.: Die modernen Askania-Gravimeter: Erfahrungen, Verbesserungen und ihre Leistungsfähigkeit. ; Fanselau, G.: Über quadratische Mittelwerte des geomagnetischen Potentials. ; Grosse, S.: Ergebnisse gravimetrischer Regionalvermessungen im Westerzgebirge. ; Geier, S.: Die Berechnung von geoelektrischen Modellkurven bei beliebiger Elektroden-Anordnung auf horizontal geschichteten Medien. ; Neumenn, W.: Neue Untersuchung der irregulären geomagnetischen Anomalien bei Berggießhübel in Sachsen. ; Noßke, G. & Franke, R.: Einige Erfahrungen bei der geoelektrischen Kartierung von Mineralgängen, Spalten und Verschiebungen im Mittelgebirge. ; Rische, H.: Geschwindigkeitsbestimmung aus reflexionsseismischen Messungen bei Anwendung von Luftschüssen. ;

Description: research

Description: DGG, DFG, SUB Göttingen

Description: INHALTSVERZEICHNIS: Caputo, M.: Ein graphisches Verfahren für die Berechnung der vertikalen Komponente der Anziehungskraft zylindrischer Körper und dessen Anwendung für die Bestimmung der Gestalt von Gletscherbetten . . . 359 ; Strobach, K.: Morphologische Untersuchung mikroseismischer Bodenbewegungen nach stereoskopischen Vektorregistrierungen . . . 369 ; Belluigi, A.: Das skalare durch einen rechteckigen Impuls in einem homogenen Medium erzeugte Potential . . . 380 ;

Description: research

Description: DGG, DFG, SUB Göttingen

Description: Dieser Band enthält 46 Beiträge zu Themengebieten der Physik der festen Erde, des magnetischen und elektrischen Felds der Erde, der Physik der Atmophäre und der angewandten Geophysik, veröffentlicht durch die Deutsche Geophysikalische Gesellschaft in dem Jahr 1941/42.

Description: 〈html〉 〈body〉 〈li〉〈a href="https://gdz.sub.uni-goettingen.de/download/pdf/PPN101433392X_0017/LOG_0004.pdf"〉Titelseite〈/a〉〈/li〉 〈li〉〈a href="https://gdz.sub.uni-goettingen.de/download/pdf/PPN101433392X_0017/LOG_0005.pdf"〉Autorenverzeichnis〈/a〉〈/li〉 〈li〉〈a href="https://gdz.sub.uni-goettingen.de/download/pdf/PPN101433392X_0017/LOG_0006.pdf"〉Sachverzeichnis〈/a〉〈/li〉 〈li〉〈a href="https://gdz.sub.uni-goettingen.de/download/pdf/PPN101433392X_0017/LOG_0007.pdf"〉Eine Neuberechnung der Dichteverteilung und der davon abhängenden physikalischen Größen im Erdinnern〈/a〉〈br〉(Haalck, H.)〈/li〉 〈li〉〈a href="https://gdz.sub.uni-goettingen.de/download/pdf/PPN101433392X_0017/LOG_0008.pdf"〉Zur Frage der regionalen Verkoppelung von Erdbeben. III〈/a〉〈br〉(Tams, E.)〈/li〉 〈li〉〈a href="https://gdz.sub.uni-goettingen.de/download/pdf/PPN101433392X_0017/LOG_0009.pdf"〉Einige Notizen über das rumänische Erdbeben vom 10. November 1940〈/a〉〈br〉(Müller-Deile, G.)〈/li〉 〈li〉〈a href="https://gdz.sub.uni-goettingen.de/download/pdf/PPN101433392X_0017/LOG_0012.pdf"〉Die Verwechslung des Koordinaten-Nullpunktes mit den Epizentralkoordinaten, die P. Caloi bei der Beurteilung meiner Nahbebenausgleichungen unterlaufen ist〈/a〉〈br〉(Schmerwitz, G.)〈/li〉 〈li〉〈a href="https://gdz.sub.uni-goettingen.de/download/pdf/PPN101433392X_0017/LOG_0013.pdf"〉Erfahrungen bei Störungen von Schwerependel durch Fernbeben〈/a〉〈br〉(Gockel, H.)〈/li〉 〈li〉〈a href="https://gdz.sub.uni-goettingen.de/download/pdf/PPN101433392X_0017/LOG_0014.pdf"〉Ein geomagnetischer Längeneffekt der F-Schicht-Ionisation〈/a〉〈br〉(Burkard, O.)〈/li〉 〈li〉〈a href="https://gdz.sub.uni-goettingen.de/download/pdf/PPN101433392X_0017/LOG_0015.pdf"〉Die magnetische Großstörung vom 1. März 1941〈/a〉〈br〉(Bartels, J.)〈/li〉 〈li〉〈a href="https://gdz.sub.uni-goettingen.de/download/pdf/PPN101433392X_0017/LOG_0016.pdf"〉Berichte über das Nordlicht vom 1. März 1941〈/a〉〈br〉(Knoechel, H., Liebermann, K., Merfeld, H., Schindler, G., Buchar, E., Stützer, H., Büdeler, W., lehr, L., Menze, H., Teichgraeber, A., Franz, J., Classen, J., Leonard, G., Malsch, W., Schilp, E., Kaiser, F., Beyer, M., Tanck, Mertins, Scultetus, Lux, J., Wirtitsch)〈/li〉 〈li〉〈a href="https://gdz.sub.uni-goettingen.de/download/pdf/PPN101433392X_0017/LOG_0017.pdf"〉Potsdamer erdmagnetische Kennziffern. 〈i〉9. Mitteilung〈/i〉〈/a〉〈br〉(Burger, A.)〈/li〉 〈li〉〈a href="https://gdz.sub.uni-goettingen.de/download/pdf/PPN101433392X_0017/LOG_0018.pdf"〉Tägliche Sonnenflecken-Relativzahlen für das 4. Vierteljahr 1940〈/a〉〈br〉(Brunner, W.)〈/li〉 〈li〉〈a href="https://gdz.sub.uni-goettingen.de/download/pdf/PPN101433392X_0017/LOG_0019.pdf"〉Tägliche Sonnenflecken-Relativzahlen für das 1. Vierteljahr 1941〈/a〉〈br〉(Brunner, W.)〈/li〉 〈li〉〈a href="https://gdz.sub.uni-goettingen.de/download/pdf/PPN101433392X_0017/LOG_0020.pdf"〉Referate und Mitteilungen〈/a〉〈br〉(Bungers, R.)〈/li〉 〈li〉〈a href="https://gdz.sub.uni-goettingen.de/download/pdf/PPN101433392X_0017/LOG_0021.pdf"〉Über einige Gravimeter-Vergleichsmessungen〈/a〉〈br〉(v. Thyssen, S.)〈/li〉 〈li〉〈a href="https://gdz.sub.uni-goettingen.de/download/pdf/PPN101433392X_0017/LOG_0022.pdf"〉Neuere Untersuchungen der Reichsanstalt für Erdbebenforschung über bautechnische Erdbebensicherung〈/a〉〈br〉(Sieberg, A.)〈/li〉 〈li〉〈a href="https://gdz.sub.uni-goettingen.de/download/pdf/PPN101433392X_0017/LOG_0024.pdf"〉Seismik und tektonische Geologie der Jetztzeit〈/a〉〈br〉(Schwinner, R.)〈/li〉 〈li〉〈a href="https://gdz.sub.uni-goettingen.de/download/pdf/PPN101433392X_0017/LOG_0025.pdf"〉Seismische Untersuchungen des Geophysikalischen Instituts in Göttingen. XLI. Analyse eines mikroseismischen Sturmes〈/a〉〈br〉(Bungers, R.)〈/li〉 〈li〉〈a href="https://gdz.sub.uni-goettingen.de/download/pdf/PPN101433392X_0017/LOG_0028.pdf"〉Das Gleichgewicht der Kräfte im Innern des Erdkerns und die sich daraus ergebenden Folgerungen〈/a〉〈br〉(Haalck, H.)〈/li〉 〈li〉〈a href="https://gdz.sub.uni-goettingen.de/download/pdf/PPN101433392X_0017/LOG_0029.pdf"〉Potsdamer erdmagnetische Kennziffern. 〈i〉10. Mitteilung〈/i〉〈/a〉〈br〉(Burger, A.)〈/li〉 〈li〉〈a href="https://gdz.sub.uni-goettingen.de/download/pdf/PPN101433392X_0017/LOG_0030.pdf"〉Tägliche Sonnenflecken-Relativzahlen für das 2. Vierteljahr 1941〈/a〉〈br〉(Brunner, W.)〈/li〉 〈li〉〈a href="https://gdz.sub.uni-goettingen.de/download/pdf/PPN101433392X_0017/LOG_0031.pdf"〉Referate und Mitteilungen〈/a〉〈br〉(Schulz, B., Schriel, Israël, H.)〈/li〉 〈li〉〈a href="https://gdz.sub.uni-goettingen.de/download/pdf/PPN101433392X_0017/LOG_0032.pdf"〉Die Schwere auf den Hawai-Inseln (Über Reduktionen, Isostasie und Verwandtes)〈/a〉〈br〉(Schwinner, R.)〈/li〉 〈li〉〈a href="https://gdz.sub.uni-goettingen.de/download/pdf/PPN101433392X_0017/LOG_0034.pdf"〉Erzeugung sinusförmiger Wechselströme in dem unter dem Hörbarkeitsbereich liegenden Frequenzgebiet〈/a〉〈br〉(Müller, M.)〈/li〉 〈li〉〈a href="https://gdz.sub.uni-goettingen.de/download/pdf/PPN101433392X_0017/LOG_0035.pdf"〉Über die Ausrechnung der zweiten partiellen Ableitungen des Schwerepotentials aus den Drehwaagebeobachtungen nach der Mehode der kleinsten Quadrate〈/a〉〈br〉(Apsen, B.)〈/li〉 〈li〉〈a href="https://gdz.sub.uni-goettingen.de/download/pdf/PPN101433392X_0017/LOG_0037.pdf"〉Erwiderung zu Apsen: Ausrechnung von Drehwaagebeobachtungen〈/a〉〈br〉(Ansel, E. A.)〈/li〉 〈li〉〈a href="https://gdz.sub.uni-goettingen.de/download/pdf/PPN101433392X_0017/LOG_0038.pdf"〉Über Präzessionsbewegungen zonal driftender Luftringe〈/a〉〈br〉(Mügge, R., Mannweiler, R.)〈/li〉 〈li〉〈a href="https://gdz.sub.uni-goettingen.de/download/pdf/PPN101433392X_0017/LOG_0039.pdf"〉Vorläufige Ergebnisse der erdmagnetischen Beobachtungen in Niemegk im Jahre 1940〈/a〉〈br〉(Fanselau, G.)〈/li〉 〈li〉〈a href="https://gdz.sub.uni-goettingen.de/download/pdf/PPN101433392X_0017/LOG_0040.pdf"〉Die Anwendung des Druckindikators in der Funkmutung〈/a〉〈br〉(Fritsch, V., Forejt, H.)〈/li〉 〈li〉〈a href="https://gdz.sub.uni-goettingen.de/download/pdf/PPN101433392X_0017/LOG_0042.pdf"〉Potsdamer erdmagnetische Kennziffern. 〈i〉11. Mitteilung〈/i〉〈/a〉〈br〉(Burger, A.)〈/li〉 〈li〉〈a href="https://gdz.sub.uni-goettingen.de/download/pdf/PPN101433392X_0017/LOG_0043.pdf"〉Tägliche Sonnenflecken-Relativzahlen für das 3. Vierteljahr 1941〈/a〉〈br〉(Brunner, W.)〈/li〉 〈li〉〈a href="https://gdz.sub.uni-goettingen.de/download/pdf/PPN101433392X_0017/LOG_0044.pdf"〉Neuordnung des Studiums der Geophysik, Meteorologie und Ozeanographie〈/a〉〈/li〉 〈li〉〈a href="https://gdz.sub.uni-goettingen.de/download/pdf/PPN101433392X_0017/LOG_0045.pdf"〉Referate und Mitteilungen〈/a〉〈br〉(Schilp, Teichgraeber, A., Walter, K., Gliese, W., Goethe, J. W., Goldmann, G., Swerzina, O., Liebermann, K., Sickenberg)〈/li〉 〈li〉〈a href="https://gdz.sub.uni-goettingen.de/download/pdf/PPN101433392X_0017/LOG_0046.pdf"〉Antwort auf die Erwiderung von Prof. Ansel〈/a〉〈br〉(Apsen, B.)〈/li〉 〈li〉〈a href="https://gdz.sub.uni-goettingen.de/download/pdf/PPN101433392X_0017/LOG_0047.pdf"〉Ernst Kohlschütter †〈/a〉〈br〉(Maurer, H.)〈/li〉 〈li〉〈a href="https://gdz.sub.uni-goettingen.de/download/pdf/PPN101433392X_0017/LOG_0048.pdf"〉Seismische Untersuchungen des Geophysikalischen Instituts in Göttingen. XLII. Vergleich der Aufzeichnung von Luftdruckschreibern und Luftdruckvariographen bei der Schallsprengung am 16. August 1939 in Jüterbog〈/a〉〈br〉(Suckstorff, G. A.)〈/li〉 〈li〉〈a href="https://gdz.sub.uni-goettingen.de/download/pdf/PPN101433392X_0017/LOG_0050.pdf"〉G. A. Suckstorff †〈/a〉〈br〉(Angenheister, G.)〈/li〉 〈li〉〈a href="https://gdz.sub.uni-goettingen.de/download/pdf/PPN101433392X_0017/LOG_0051.pdf"〉Die Schwerewirkung von Störungsmassen und ihre Veranschaulichung auf der Einheitskugel〈/a〉〈br〉(Jung, K.)〈/li〉 〈li〉〈a href="https://gdz.sub.uni-goettingen.de/download/pdf/PPN101433392X_0017/LOG_0052.pdf"〉Über die mögliche Beeinflußbarkeit der Drehwaage durch Grundwasserschwankungen〈/a〉〈br〉(v. Thyssen, S.)〈/li〉 〈li〉〈a href="https://gdz.sub.uni-goettingen.de/download/pdf/PPN101433392X_0017/LOG_0053.pdf"〉Grundlagen und Aufbau eines Ortsbebenseismometers mit mechanischer Registrierung〈/a〉〈br〉(Krumbach, G.)〈/li〉 〈li〉〈a href="https://gdz.sub.uni-goettingen.de/download/pdf/PPN101433392X_0017/LOG_0054.pdf"〉Beispiele für die Anwendung von Anaglyphen-Raumbildern in der Geophysik〈/a〉〈br〉(Jung, H.)〈/li〉 〈li〉〈a href="https://gdz.sub.uni-goettingen.de/download/pdf/PPN101433392X_0017/LOG_0056.pdf"〉Seismische Untersuchungen des Geophysikalischen Instituts in Göttingen. XLIII. Bestimmung einer Grenzfläche durch Laufzeiten oder Richtungswinkel reflektierter Wellen〈/a〉〈br〉(Angenheister, G.)〈/li〉 〈li〉〈a href="https://gdz.sub.uni-goettingen.de/download/pdf/PPN101433392X_0017/LOG_0059.pdf"〉Potsdamer erdmagnetische Kennziffern. 〈i〉12. Mitteilung〈/i〉〈/a〉〈br〉(Bartels, J., Burger, A.)〈/li〉 〈li〉〈a href="https://gdz.sub.uni-goettingen.de/download/pdf/PPN101433392X_0017/LOG_0061.pdf"〉Tägliche Sonnenflecken-Relativzahlen für das 4. Vierteljahr 1941〈/a〉〈br〉(Brunner, W.)〈/li〉 〈li〉〈a href="https://gdz.sub.uni-goettingen.de/download/pdf/PPN101433392X_0017/LOG_0062.pdf"〉Tägliche Sonnenflecken-Relativzahlen für das 1. Vierteljahr 1942〈/a〉〈br〉(Brunner, W.)〈/li〉 〈li〉〈a href="https://gdz.sub.uni-goettingen.de/download/pdf/PPN101433392X_0017/LOG_0063.pdf"〉Tägliche Sonnenflecken-Relativzahlen für das 2. Vierteljahr 1942〈/a〉〈br〉(Brunner, W.)〈/li〉 〈li〉〈a href="https://gdz.sub.uni-goettingen.de/download/pdf/PPN101433392X_0017/LOG_0064.pdf"〉Tägliche Sonnenflecken-Relativzahlen für das 3. Vierteljahr 1942〈/a〉〈br〉(Brunner, W.)〈/li〉 〈li〉〈a href="https://gdz.sub.uni-goettingen.de/download/pdf/PPN101433392X_0017/LOG_0065.pdf"〉Referate und Mitteilungen〈/a〉〈br〉(Teichgraeber, A., Ruttner, H., Büttner, K., Bungers, R., Förtsch, O., Jung, H., Schriel, Schulz, B.)〈/li〉 〈li〉〈a href="https://gdz.sub.uni-goettingen.de/download/pdf/PPN101433392X_0017/LOG_0066.pdf"〉Geophysikalische Berichte 1941〈/a〉〈/li〉 〈li〉〈a href="https://gdz.sub.uni-goettingen.de/download/pdf/PPN101433392X_0017/LOG_0077.pdf"〉Geophysikalische Berichte 1942〈/a〉〈/li〉 〈/body〉 〈/html〉

Description: research

Description: DFG, SUB Göttingen

Description: INHALTSVERZEICHNIS: THYSSEN, F.: Die Temperaturabhängigkeit der P-Wellengeschwindigkeit in Gletschern und Inlandeisen . . . 65 ; DATTA, B. K.: Das Spektrum seismischer Wellen bei der Reflexion an einer Übergangsschicht . . . 80 ; SCHUCH, M. und R. WANKE: Strömungsspannungen in einigen Torf- und Sandproben . . . 94 ; SCHREIBER, H.: Ein analytischer Weg zur Bestimmung der Elektronendichte in der Magnetosphäre aus Whistler-Daten . . . 110 , BEHRENS, J. und W. WEIGEL: Bemerkungen zu Blubberbeobachtungen bei sprengseismischen Messungen auf See . . . 131 ; Kurzmitteilung: THYSSEN-BORNEMISZA, S.: Mit einem Seegravimeter bestimmte Horizontalgradienten . . . 143 ; Ergänzung zum Vorlesungsverzeichnis (Wintersemester 1966/67) . . . 145 ; Buchbesprechungen . . . 145 ;

Description: research

Description: DGG, DFG, SUB Göttingen

Description: INHALTSVERZEICHNIS: Tagung im Jahre 1968 (deutsch und englisch) . . . 295/296 ; GEBRANDE, H.: Der Einfluß von Phasenumwandlungen auf Konvektionssströme im Erdmantel . . . 297 ; JUNG, K. und H. SCHAAF: Gravimetermessungen im Nördlinger Ries und seiner Umgebung, Abschätzung der gesamten Defizitmasse (mit Faltkarte) . . . . . . . 319 ; KEPPLER, E., KIRSCH, E.‚ MÖRL, P., MUSMANN, G., ROSSBACH, A. und L. ROSSBERG: Raketenexperiment zur Untersuchung von Nordlichtern . . . 346 ; Briefe an den Herausgeber: ISRAËL, H.: Bemerkungen zum Begriff der „luftelektrisch ungestörten“ Zeiten . . . 362 ; Verzeichnis der geophysikalischen Vorlesungen (Wintersemester 1967/68) . . . 364 ; Buchbesprechungen . . . 368 ; Diesem Heft liegt eine Faltkarte bei.

Description: research

Description: DGG, DFG, SUB Göttingen

Description: INHALTSVERZEICHNIS: SEILER, E. Und W. KERTZ: Der polare Elektrojet . . . 371 ; LORCH S.: Messung zeitlicher Wassergehaltsänderungen im Boden . . . 403 ; KAUTZLEBEN, H.: Zur Interpretation des geomagnetischen Hauptfeldes als vektorielles Zufallsfeld . . . 415 ; BORISEVIČ, E. S.: Sowjetische Geräte für die Erdbebenregistrierung . . . 425 ; R. MEISSNER: Vergleiche seismischer Weitwinkelmessungen in der UdSSR und im bayrischen Molassebecken . . . 439 ; Briefe an den Herausgeber: HIERONYMUS, H.: Eine Zweipolschollen-Hypothese der Kontinentverschiebung . . . 453 ; BURKHARDT, H., F. KELLER, G MÜLLER, O. ROSENBACH und R. VEES: Bemerkungen zur Einsatzmöglichkeit der Magnetband-Refraktionsapparaturen MARS 66 in großen Registrierentfernungen . . . 455 ; Kurzmitteilung: SCHULT, A.: The effect of hydrostatic pressure on the compensation temperature of magnetization in a Li-Cr-ferrite . . . 458 ; Buchbesprechungen . . . 462 ;

Description: research

Description: DGG, DFG, SUB Göttingen

Description: INHALTSVERZEICHNIS: GIESE, P., C. PRODEHL und C. BEHNKE: Ergebnisse refraktionsseismischer Messungen 1965 zwischen dem Französischen Zentralmassiv und den Westalpen . . . 215 ; WAGNER, F. CH.: Die Stabilität einiger Serpentinitproben aus Granulitgebirge von Sachsen . . . 262 ; MÜHLEISEN‚R.: Über atlantische und tropische Gewitter . . . 273 ; Kurzmitteilung: TREUMANN, R.: Induktionspfeile über ideal horizontalen Schichtungen . . . 285 ; Briefe an den Herausgeber: LORCH, S.: Ein Gerät zur Messung der Geschwindigkeit (Betrag und Richtung) des Grundwassers in einem Bohrloch . . . 287 ; PROS, Z. und V. BABUŠKA: A Method for Investigating the Elastic Anisotropy on Spherical Rock Samples . . . 289 ; Buchbesprechungen . . . 292 ;

Description: research

Description: DGG, DFG, SUB Göttingen

Description: Inhaltsverzeichnis: Zum neuen Jahrgang . . . 1 ; Zur Denkschrift „Physik des Erdkörpers“ . . . 3 ; Jung, K.: neuere Gedanken und Ergebnisse über die Gestalt des Erdkörpers und die Verteilung der Massen im Erdinneren . . . 7 ; Müller, G.: Theoretical Seismograms for some Types of Point-sources in Layered Media Part I: Theory . . . 15 ; Dizioğlu, M. Y.: A Method for Determining True Chargeabilities of Vertical Discontinuities and its Application to Some Types of Lead-Zinc Ores in Turkey . . . 37 ; Zech, G.: Veränderungen der magnetischen Eigenschaften von Basaltsäulen seit dem Tertiär . . . 53 ; Eichmeier, J.: Die theoretischen Grundlagen und das Auflösungsvermögen von Aspirations-Beweglichkeitsspektrographen für atmosphärische Ionen . . . 69 ; Ebel, A.: Zeitliche Variation und Genauigkeit bei der Bestimmung der Höhenveränderlichkeit geomagnetischer Elemente, abgeleitet aus Normalfeldern für Mitteleuropa . . . 87 ; Briefe an den Herausgeber: Meissner, R.: Zur Deutung der hypsometrischen Kurven von Erde und Mond . . . 99 ; Buchbesprechungen . . . 103 ;

Description: research

Description: DGG, DFG, SUB Göttingen

Description: Author(s): Sushant Saryal, Juliane U. Klamser, Tridib Sadhu, and Deepak Dhar There is a misconception, widely shared among physicists, that the equilibrium free energy of a one-dimensional classical model with strictly finite-ranged interactions, and at nonzero temperatures, cannot show any singularities as a function of the coupling constants. In this Letter, we discuss an ... [Phys. Rev. Lett. 121, 240601] Published Thu Dec 13, 2018

Description: Author(s): Seth Lloyd and Christian Weedbrook Researchers have mathematically proven that a powerful classical machine learning algorithm should work on quantum computers. [Phys. Rev. Lett. 121, 040502] Published Thu Jul 26, 2018

Description: Author(s): Edgar A. Aguilar, Jakub J. Borkała, Piotr Mironowicz, and Marcin Pawłowski We present a new quantum communication complexity protocol, the promise-quantum random access code, which allows us to introduce a new measure of unbiasedness for bases of Hilbert spaces. The proposed measure possesses a clear operational meaning and can be used to investigate whether a specific num... [Phys. Rev. Lett. 121, 050501] Published Mon Jul 30, 2018

Description: Author(s): Kai Ji and Boris V. Fine We investigate numerically and analytically the heating process in ergodic clusters of interacting spins 1 / 2 subjected to periodic pulses of an external magnetic field. Our findings indicate that there is a threshold for the pulse strength below which the heating is suppressed. This threshold decrea... [Phys. Rev. Lett. 121, 050602] Published Fri Aug 03, 2018

Description: Author(s): Amos Chan, Andrea De Luca, and J. T. Chalker We study spectral statistics in spatially extended chaotic quantum many-body systems, using simple lattice Floquet models without time-reversal symmetry. Computing the spectral form factor K ( t ) analytically and numerically, we show that it follows random matrix theory (RMT) at times longer than a ma... [Phys. Rev. Lett. 121, 060601] Published Tue Aug 07, 2018

Description: Author(s): Felix C. Binder, Jayne Thompson, and Mile Gu Stochastic processes are as ubiquitous throughout the quantitative sciences as they are notorious for being difficult to simulate and predict. In this Letter, we propose a unitary quantum simulator for discrete-time stochastic processes which requires less internal memory than any classical analogue... [Phys. Rev. Lett. 120, 240502] Published Mon Jun 11, 2018

Description: Author(s): Jun Gao, Lu-Feng Qiao, Zhi-Qiang Jiao, Yue-Chi Ma, Cheng-Qiu Hu, Ruo-Jing Ren, Ai-Lin Yang, Hao Tang, Man-Hong Yung, and Xian-Min Jin Quantum information technologies provide promising applications in communication and computation, while machine learning has become a powerful technique for extracting meaningful structures in “big data.” A crossover between quantum information and machine learning represents a new interdisciplinary... [Phys. Rev. Lett. 120, 240501] Published Mon Jun 11, 2018

Description: Author(s): Giacomo Torlai and Roger G. Melko Machine learning is actively being explored for its potential to design, validate, and even hybridize with near-term quantum devices. A central question is whether neural networks can provide a tractable representation of a given quantum state of interest. When true, stochastic neural networks can b... [Phys. Rev. Lett. 120, 240503] Published Fri Jun 15, 2018

Description: Author(s): Yijian Zou, Ashley Milsted, and Guifre Vidal We establish that a Bloch-state ansatz based on periodic uniform matrix product states (PUMPS), originally designed to capture single-quasiparticle excitations in gapped systems, is in fact capable of accurately approximating all low-energy eigenstates of critical quantum spin chains on the circle. ... [Phys. Rev. Lett. 121, 230402] Published Fri Dec 07, 2018

Description: Author(s): Enej Ilievski, Jacopo De Nardis, Marko Medenjak, and Tomaž Prosen We identify a class of one-dimensional spin and fermionic lattice models that display diverging spin and charge diffusion constants, including several paradigmatic models of exactly solvable, strongly correlated many-body dynamics such as the isotropic Heisenberg spin chains, the Fermi-Hubbard model... [Phys. Rev. Lett. 121, 230602] Published Fri Dec 07, 2018

Description: Author(s): Matt Jaffe, Victoria Xu, Philipp Haslinger, Holger Müller, and Paul Hamilton We present an atom interferometry technique in which the beam splitter is split into two separate operations. A microwave pulse first creates a spin-state superposition, before optical adiabatic passage spatially separates the arms of that superposition. Despite using a thermal atom sample in a smal... [Phys. Rev. Lett. 121, 040402] Published Tue Jul 24, 2018

Description: Author(s): Rishi N. Patel, Zhaoyou Wang, Wentao Jiang, Christopher J. Sarabalis, Jeff T. Hill, and Amir H. Safavi-Naeini Photons and electrons transmit information to form complex systems and networks. Phonons on the other hand, the quanta of mechanical motion, are often considered only as carriers of thermal energy. Nonetheless, their flow can also be molded in fabricated nanoscale circuits. We design and experimenta... [Phys. Rev. Lett. 121, 040501] Published Tue Jul 24, 2018

Description: Author(s): Philipp Strasberg and Massimiliano Esposito Quantum non-Markovianity is crucially related to the study of dynamical maps, which are usually derived for initially factorized system-bath states. We demonstrate that linear response theory also provides a way to derive dynamical maps but for initially correlated (and, in general, entangled) state... [Phys. Rev. Lett. 121, 040601] Published Tue Jul 24, 2018

Description: Author(s): P. Magnard, P. Kurpiers, B. Royer, T. Walter, J.-C. Besse, S. Gasparinetti, M. Pechal, J. Heinsoo, S. Storz, A. Blais, and A. Wallraff Active qubit reset is a key operation in many quantum algorithms, and particularly in quantum error correction. Here, we experimentally demonstrate a reset scheme for a three-level transmon artificial atom coupled to a large bandwidth resonator. The reset protocol uses a microwave-induced interactio... [Phys. Rev. Lett. 121, 060502] Published Tue Aug 07, 2018

Description: Author(s): Ivan Corwin, Promit Ghosal, Alexandre Krajenbrink, Pierre Le Doussal, and Li-Cheng Tsai We establish a large deviation principle for the Kardar-Parisi-Zhang (KPZ) equation, providing precise control over the left tail of the height distribution for narrow wedge initial condition. Our analysis exploits an exact connection between the KPZ one-point distribution and the Airy point process... [Phys. Rev. Lett. 121, 060201] Published Wed Aug 08, 2018

Description: Author(s): J. F. Haase, P. J. Vetter, T. Unden, A. Smirne, J. Rosskopf, B. Naydenov, A. Stacey, F. Jelezko, M. B. Plenio, and S. F. Huelga We present a flexible scheme to realize non-Markovian dynamics of an electronic spin qubit, using a nitrogen-vacancy center in diamond where the inherent nitrogen spin serves as a regulator of the dynamics. By changing the population of the nitrogen spin, we show that we can smoothly tune the non-Ma... [Phys. Rev. Lett. 121, 060401] Published Thu Aug 09, 2018

Description: Author(s): Siamak Dadras, Alexander Gresch, Caspar Groiseau, Sandro Wimberger, and Gil S. Summy By manipulating the momenta of ultracold atoms, researchers demonstrate a quantum walk—a potential ingredient for quantum search algorithms. [Phys. Rev. Lett. 121, 070402] Published Thu Aug 16, 2018

Description: Author(s): Dominik Rauch, Johannes Handsteiner, Armin Hochrainer, Jason Gallicchio, Andrew S. Friedman, Calvin Leung, Bo Liu, Lukas Bulla, Sebastian Ecker, Fabian Steinlechner, Rupert Ursin, Beili Hu, David Leon, Chris Benn, Adriano Ghedina, Massimo Cecconi, Alan H. Guth, David I. Kaiser, Thomas Scheidl, and Anton Zeilinger Two groups have ruled out local realism on cosmic scales, one using stars and also closing the detection loophole, the other using distant quasars. [Phys. Rev. Lett. 121, 080403] Published Mon Aug 20, 2018

Description: Author(s): Ming-Han Li, Cheng Wu, Yanbao Zhang, Wen-Zhao Liu, Bing Bai, Yang Liu, Weijun Zhang, Qi Zhao, Hao Li, Zhen Wang, Lixing You, W. J. Munro, Juan Yin, Jun Zhang, Cheng-Zhi Peng, Xiongfeng Ma, Qiang Zhang, Jingyun Fan, and Jian-Wei Pan Two groups have ruled out local realism on cosmic scales, one using stars and also closing the detection loophole, the other using distant quasars. [Phys. Rev. Lett. 121, 080404] Published Mon Aug 20, 2018

Description: Author(s): Xing Rong, Man Jiao, Jianpei Geng, Bo Zhang, Tianyu Xie, Fazhan Shi, Chang-Kui Duan, Yi-Fu Cai, and Jiangfeng Du A new laboratory bound on the axial-vector mediated interaction between electron spins at micrometer scale is established with single nitrogen-vacancy (NV) centers in diamond. A single crystal of p -terphenyl doped pentacene- d 14 under laser pumping provides the source of polarized electron spins. Bas... [Phys. Rev. Lett. 121, 080402] Published Wed Aug 22, 2018

Description: Author(s): Alexandru Macridin, Panagiotis Spentzouris, James Amundson, and Roni Harnik We present an algorithm that extends existing quantum algorithms for simulating fermion systems in quantum chemistry and condensed matter physics to include bosons in general and phonons in particular. We introduce a qubit representation for the low-energy subspace of phonons which allows an efficie... [Phys. Rev. Lett. 121, 110504] Published Wed Sep 12, 2018

Description: Author(s): Ondřej Černotík, Sahand Mahmoodian, and Klemens Hammerer Faithful conversion of quantum signals between microwave and optical frequency domains is crucial for building quantum networks based on superconducting circuits. Optoelectromechanical systems, in which microwave and optical cavity modes are coupled to a common mechanical oscillator, are a promising... [Phys. Rev. Lett. 121, 110506] Published Fri Sep 14, 2018

Description: Author(s): Viktor Holubec and Artem Ryabov According to the laws of thermodynamics, no heat engine can beat the efficiency of a Carnot cycle. This efficiency traditionally comes with vanishing power output and practical designs, optimized for power, generally achieve far less. Recently, various strategies to obtain Carnot’s efficiency at lar... [Phys. Rev. Lett. 121, 120601] Published Mon Sep 17, 2018

Description: Author(s): M. Holten, L. Bayha, A. C. Klein, P. A. Murthy, P. M. Preiss, and S. Jochim The frequency of the breathing mode of a two-dimensional Fermi gas with zero-range interactions in a harmonic confinement is fixed by the scale invariance of the Hamiltonian. Scale invariance is broken in the quantized theory by introducing the two-dimensional scattering length as a regulator. This ... [Phys. Rev. Lett. 121, 120401] Published Mon Sep 17, 2018

Description: Author(s): Da-Jiang Liu, Chi-Jen Wang, and James W. Evans We consider Schloegl models (or contact processes) where particles on a square grid annihilate at a rate p and are created at a rate of k n = n ( n − 1 ) / [ N ( N − 1 ) ] at empty sites with n particles in a neighborhood Ω N of size N . Simulation reveals a discontinuous transition between populated and vacuum states... [Phys. Rev. Lett. 121, 120603] Published Fri Sep 21, 2018

Description: Author(s): Katarzyna Macieszczak, Kay Brandner, and Juan P. Garrahan Thermodynamic uncertainty relations (TURs) are recently established relations between the relative uncertainty of time-integrated currents and entropy production in nonequilibrium systems. For small perturbations away from equilibrium, linear response (LR) theory provides the natural framework to st... [Phys. Rev. Lett. 121, 130601] Published Mon Sep 24, 2018

Description: Author(s): Fanglin Bao, Kezhang Shi, Guanjun Cao, Julian S. Evans, and Sailing He We propose a scheme for transporting nanoparticles immersed in a fluid, relying on quantum vacuum fluctuations. The mechanism lies in the inhomogeneity-induced lateral Casimir force between a nanoparticle and a gradient metasurface and the relaxation of the conventional Dzyaloshinskiǐ-Lifshitz-Pitae... [Phys. Rev. Lett. 121, 130401] Published Mon Sep 24, 2018

Description: Author(s): J. Runeson, M. Nava, and M. Parrinello We address the problem of the minus sign sampling for two-electron systems using the path integral approach. We show that this problem can be reexpressed as one of computing free energy differences and sampling the tails of statistical distributions. Using metadynamics, a realistic problem like that... [Phys. Rev. Lett. 121, 140602] Published Wed Oct 03, 2018

Description: Author(s): Ping Fang, Liyi Zhao, and Chushun Tian The emergence of nonequilibrium phenomena in individual complex wave systems has long been of fundamental interest. Its analytic studies remain notoriously difficult. Using the mathematical tool of the concentration of measure , we develop a theory for structures and fluctuations of waves in individu... [Phys. Rev. Lett. 121, 140603] Published Wed Oct 03, 2018

Description: Author(s): Hatem Barghathi, C. M. Herdman, and Adrian Del Maestro Operationally accessible entanglement in bipartite systems of indistinguishable particles could be reduced due to restrictions on the allowed local operations as a result of particle number conservation. In order to quantify this effect, Wiseman and Vaccaro [ Phys. Rev. Lett. 91 , 097902 (2003) ] intro... [Phys. Rev. Lett. 121, 150501] Published Fri Oct 12, 2018

Description: Author(s): Mihail Poplavskyi and Grégory Schehr We compute the persistence for the 2 D -diffusion equation with random initial condition, i.e., the probability p 0 ( t ) that the diffusion field, at a given point x in the plane, has not changed sign up to time t . For large t , we show that p 0 ( t ) ∼ t − θ ( 2 ) with θ ( 2 ) = 3 / 16 . Using the connection between the 2 D ... [Phys. Rev. Lett. 121, 150601] Published Fri Oct 12, 2018

Description: Author(s): Yaoyao Zhou, Juan Yu, Zhihui Yan, Xiaojun Jia, Jing Zhang, Changde Xie, and Kunchi Peng Secret sharing is a conventional technique for realizing secure communications in information networks, where a dealer distributes to n players a secret, which can only be decoded through the cooperation of k ( n / 2 〈 k ≤ n ) players. In recent years, quantum resources have been employed to enhance secu... [Phys. Rev. Lett. 121, 150502] Published Fri Oct 12, 2018

Description: Author(s): Daniel Martínez, Armin Tavakoli, Mauricio Casanova, Gustavo Cañas, Breno Marques, and Gustavo Lima Quantum resources can improve communication complexity problems (CCPs) beyond their classical constraints. One quantum approach is to share entanglement and create correlations violating a Bell inequality, which can then assist classical communication. A second approach is to resort solely to the pr... [Phys. Rev. Lett. 121, 150504] Published Fri Oct 12, 2018

Description: Author(s): Wei Sun, Chang-Rui Yi, Bao-Zong Wang, Wei-Wei Zhang, Barry C. Sanders, Xiao-Tian Xu, Zong-Yao Wang, Joerg Schmiedmayer, Youjin Deng, Xiong-Jun Liu, Shuai Chen, and Jian-Wei Pan Topological quantum states are characterized by nonlocal invariants. We present a new dynamical approach for ultracold-atom systems to uncover their band topology, and we provide solid evidence to demonstrate its experimental advantages. After quenching a two-dimensional (2D) Chern band, realized in... [Phys. Rev. Lett. 121, 250403] Published Tue Dec 18, 2018

Description: Author(s): Vedran Dunjko, Yimin Ge, and J. Ignacio Cirac A hybrid quantum-classical computing algorithm could solve a basic computer science problem faster than a classical computer. [Phys. Rev. Lett. 121, 250501] Published Tue Dec 18, 2018

Description: Author(s): Thomas Bilitewski, Subhro Bhattacharjee, and Roderich Moessner We study the chaotic dynamics in a classical many-body system of interacting spins on the kagome lattice. We characterize many-body chaos via the butterfly effect as captured by an appropriate out-of-time-ordered commutator. Due to the emergence of a spin-liquid phase, the chaotic dynamics extends a... [Phys. Rev. Lett. 121, 250602] Published Tue Dec 18, 2018

Description: Author(s): Leonardo Banchi, W. Steven Kolthammer, and M. S. Kim Determining an unknown quantum state from an ensemble of identical systems is a fundamental, yet experimentally demanding, task in quantum science. Here we study the number of measurement bases needed to fully characterize an arbitrary multimode state containing a definite number of photons, or an a... [Phys. Rev. Lett. 121, 250402] Published Tue Dec 18, 2018

Description: Author(s): Michał Parniak, Sebastian Borówka, Kajetan Boroszko, Wojciech Wasilewski, Konrad Banaszek, and Rafał Demkowicz-Dobrzański Multiparameter estimation theory offers a general framework to explore imaging techniques beyond the Rayleigh limit. While optimal measurements of single parameters characterizing a composite light source are now well understood, simultaneous determination of multiple parameters poses a much greater... [Phys. Rev. Lett. 121, 250503] Published Tue Dec 18, 2018

Description: Author(s): Dripto M. Debroy, Muyuan Li, Michael Newman, and Kenneth R. Brown Coherent errors are a dominant noise process in many quantum computing architectures. Unlike stochastic errors, these errors can combine constructively and grow into highly detrimental overrotations. To combat this, we introduce a simple technique for suppressing systematic coherent errors in low-de... [Phys. Rev. Lett. 121, 250502] Published Tue Dec 18, 2018

Description: Author(s): P.-K. Chen, L.-R. Liu, M.-J. Tsai, N.-C. Chiu, Y. Kawaguchi, S.-K. Yip, M.-S. Chang, and Y.-J. Lin We demonstrate synthetic azimuthal gauge potentials for Bose-Einstein condensates from engineering atom-light couplings. The gauge potential is created by adiabatically loading the condensate into the lowest energy Raman-dressed state, achieving a coreless vortex state. The azimuthal gauge potential... [Phys. Rev. Lett. 121, 250401] Published Tue Dec 18, 2018

Description: Author(s): Stefan Bäuml, Siddhartha Das, and Mark M. Wilde Bipartite quantum interactions have applications in a number of different areas of quantum physics, reaching from fundamental areas such as quantum thermodynamics and the theory of quantum measurements to other applications such as quantum computers, quantum key distribution, and other information p... [Phys. Rev. Lett. 121, 250504] Published Wed Dec 19, 2018

Description: Author(s): Zongping Gong and Masahito Ueda We unveil the stable ( d + 1 )-dimensional topological structures underlying the quench dynamics for all of the Altland-Zirnbauer classes in d = 1 dimension, and we propose to detect such dynamical topology from the time evolution of entanglement spectra. Focusing on systems in classes BDI and D, we find ... [Phys. Rev. Lett. 121, 250601] Published Wed Dec 19, 2018

Description: Author(s): Fangli Liu, James R. Garrison, Dong-Ling Deng, Zhe-Xuan Gong, and Alexey V. Gorshkov In the study of non-equilibrium dynamics of Abelian anyons, spatially asymmetric particle transport is found, providing a novel method to detect anyonic statistics. [Phys. Rev. Lett. 121, 250404] Published Thu Dec 20, 2018

Description: Author(s): Paul A. Knott, Tommaso Tufarelli, Marco Piani, and Gerardo Adesso Quantum Darwinism posits that information becomes objective whenever multiple observers indirectly probe a quantum system by each measuring a fraction of the environment. It was recently shown that objectivity of observables emerges generically from the mathematical structure of quantum mechanics, w... [Phys. Rev. Lett. 121, 160401] Published Wed Oct 17, 2018

Description: Author(s): Luca Mancino, Vasco Cavina, Antonella De Pasquale, Marco Sbroscia, Robert I. Booth, Emanuele Roccia, Ilaria Gianani, Vittorio Giovannetti, and Marco Barbieri Theoretical bounds on irreversible entropy production in a thermalizing quantum system are supported by experiments simulating the thermalization of a qubit using a quantum photonic architecture. [Phys. Rev. Lett. 121, 160602] Published Wed Oct 17, 2018

Description: Author(s): Xizhi Han (韩希之) and Sean A. Hartnoll We prove an upper bound on the diffusivity of a dissipative, local, and translation invariant quantum Markovian spin system: D ≤ D 0 + ( α v LR τ + β ξ ) v C . Here v LR is the Lieb-Robinson velocity, v C is a velocity defined by the current operator, τ is the decoherence time, ξ is the range of interactions, D 0 is a... [Phys. Rev. Lett. 121, 170601] Published Tue Oct 23, 2018

Description: Author(s): I. Roth, R. Kueng, S. Kimmel, Y.-K. Liu, D. Gross, J. Eisert, and M. Kliesch A resource efficient quantum process tomography scheme which is robust against errors is realized by combining features from randomized benchmarking and compressed sensing. [Phys. Rev. Lett. 121, 170502] Published Wed Oct 24, 2018

Description: Author(s): Alberto Boaron, Gianluca Boso, Davide Rusca, Cédric Vulliez, Claire Autebert, Misael Caloz, Matthieu Perrenoud, Gaëtan Gras, Félix Bussières, Ming-Jun Li, Daniel Nolan, Anthony Martin, and Hugo Zbinden An optical-fiber-based quantum cryptography scheme works over a record distance of 421 km and at much faster rates than previous long-distance demonstrations. [Phys. Rev. Lett. 121, 190502] Published Mon Nov 05, 2018

Description: Author(s): Anurag Anshu, Min-Hsiu Hsieh, and Rahul Jain A question that is commonly asked in all areas of physics is how a certain property of a physical system can be used to achieve useful tasks and how to quantify the amount of such a property in a meaningful way. We answer this question by showing that, in a general resource-theoretic framework that ... [Phys. Rev. Lett. 121, 190504] Published Fri Nov 09, 2018

Description: Author(s): Francesco Parisen Toldin and Fakher F. Assaad Recent numerical advances in the field of strongly correlated electron systems allow the calculation of the entanglement spectrum and entropies for interacting fermionic systems. An explicit determination of the entanglement (modular) Hamiltonian has proven to be a considerably more difficult proble... [Phys. Rev. Lett. 121, 200602] Published Wed Nov 14, 2018

Description: Author(s): Yuanyuan Chen, Sebastian Ecker, Sören Wengerowsky, Lukas Bulla, Siddarth Koduru Joshi, Fabian Steinlechner, and Rupert Ursin Sources of entanglement are an enabling resource in quantum technology, and pushing the limits of generation rate and quality of entanglement is a necessary prerequisite towards practical applications. Here, we present an ultrabright source of polarization-entangled photon pairs based on time-revers... [Phys. Rev. Lett. 121, 200502] Published Wed Nov 14, 2018

Description: Author(s): Marcus Huber, Ludovico Lami, Cécilia Lancien, and Alexander Müller-Hermes Genuine high-dimensional entanglement, i.e., the property of having a high Schmidt number, constitutes an instrumental resource in quantum communication, overcoming limitations of low-dimensional systems. States with a positive partial transpose (PPT) are generally considered weakly entangled, as th... [Phys. Rev. Lett. 121, 200503] Published Thu Nov 15, 2018

Description: Author(s): Zijun Shu, Yu Liu, Qingyun Cao, Pengcheng Yang, Shaoliang Zhang, Martin B. Plenio, Fedor Jelezko, and Jianming Cai We experimentally observe Floquet Raman transitions in the weakly driven solid-state spin system of a nitrogen-vacancy center in diamond. The periodically driven spin system simulates a two-band Wannier-Stark ladder model and allows us to observe coherent spin state transfer arising from a Raman tra... [Phys. Rev. Lett. 121, 210501] Published Mon Nov 19, 2018

Description: Author(s): Ignacio García-Mata, Marcos Saraceno, Rodolfo A. Jalabert, Augusto J. Roncaglia, and Diego A. Wisniacki Two properties are needed for a classical system to be chaotic: exponential stretching and mixing. Recently, out-of-time order correlators were proposed as a measure of chaos in a wide range of physical systems. While most of the attention has previously been devoted to the short time stretching asp... [Phys. Rev. Lett. 121, 210601] Published Tue Nov 20, 2018

Description: Author(s): Patrick P. Potts and Peter Samuelsson Fluctuation relations are powerful equalities that hold far from equilibrium. However, the standard approach to include measurement and feedback schemes may become inapplicable in certain situations, including continuous measurements, precise measurements of continuous variables, and feedback induce... [Phys. Rev. Lett. 121, 210603] Published Wed Nov 21, 2018

Description: Author(s): Yi-Zhi Xu, Chi Ho Yeung, Hai-Jun Zhou, and David Saad Lower temperature leads to a higher probability of visiting low-energy states. This intuitive belief underlies most physics-inspired strategies for addressing hard optimization problems. For instance, the popular simulated annealing (SA) dynamics is expected to approach a ground state if the tempera... [Phys. Rev. Lett. 121, 210602] Published Wed Nov 21, 2018

Description: Author(s): Mattia Walschaers, Supratik Sarkar, Valentina Parigi, and Nicolas Treps Graph states are the backbone of measurement-based continuous-variable quantum computation. However, experimental realizations of these states induce Gaussian measurement statistics for the field quadratures, which poses a barrier to obtain a genuine quantum advantage. In this Letter, we propose mod... [Phys. Rev. Lett. 121, 220501] Published Wed Nov 28, 2018

Description: Author(s): Wen-Hao Zhang, Geng Chen, Xing-Xiang Peng, Xiang-Jun Ye, Peng Yin, Ya Xiao, Zhi-Bo Hou, Ze-Di Cheng, Yu-Chun Wu, Jin-Shi Xu, Chuan-Feng Li, and Guang-Can Guo Self-testing is a method with which a classical user can certify the state and measurements of quantum systems in a device-independent way. In particular, self-testing of entangled states is of great importance in quantum information processing. An understandable example is that the maximal violatio... [Phys. Rev. Lett. 121, 240402] Published Thu Dec 13, 2018

Description: Author(s): A. E. Allahverdyan and D. Karakhanyan The problem of defining work done on an electromagnetic field (EMF) via moving charges does not have a ready solution, because the standard Hamiltonian of an EMF—whose time derivative should define the work according to the first law—is not gauge invariant. This limits applications of statistical me... [Phys. Rev. Lett. 121, 240602] Published Fri Dec 14, 2018

Description: Author(s): Nicolò Defenu, Tilman Enss, Michael Kastner, and Giovanna Morigi Slow quenches of the magnetic field across the paramagnetic-ferromagnetic phase transition of spin systems produce heat. In systems with short-range interactions the heat exhibits universal power-law scaling as a function of the quench rate, known as Kibble-Zurek scaling. In this work we analyze slo... [Phys. Rev. Lett. 121, 240403] Published Fri Dec 14, 2018

Description: Author(s): Dominik Lips, Artem Ryabov, and Philipp Maass We study the driven Brownian motion of hard rods in a one-dimensional cosine potential with a large amplitude compared to the thermal energy. In a closed system, we find surprising features of the steady-state current in dependence of the particle density. The form of the current-density relation ch... [Phys. Rev. Lett. 121, 160601] Published Tue Oct 16, 2018

Description: Author(s): M. Brunelli, L. Fusco, R. Landig, W. Wieczorek, J. Hoelscher-Obermaier, G. Landi, F. L. Semião, A. Ferraro, N. Kiesel, T. Donner, G. De Chiara, and M. Paternostro Physicists observe entropy production in two intermediate-scale quantum systems, indicating that the systems have undergone an irreversible process. [Phys. Rev. Lett. 121, 160604] Published Wed Oct 17, 2018

Description: Author(s): Giandomenico Palumbo and Nathan Goldman Monopoles are intriguing topological objects, which play a central role in gauge theories and topological states of matter. While conventional monopoles are found in odd-dimensional flat spaces, such as the Dirac monopole in three dimensions and the non-Abelian Yang monopole in five dimensions, more... [Phys. Rev. Lett. 121, 170401] Published Wed Oct 24, 2018

Description: Author(s): Olalla A. Castro-Alvaredo, Cecilia De Fazio, Benjamin Doyon, and István M. Szécsényi We investigate the quantum entanglement content of quasiparticle excitations in extended many-body systems. We show that such excitations give an additive contribution to the bipartite von Neumann and Rényi entanglement entropies that takes a simple, universal form. It is largely independent of the ... [Phys. Rev. Lett. 121, 170602] Published Fri Oct 26, 2018

Description: Author(s): J. Zopes, K. Herb, K. S. Cujia, and C. L. Degen Distance measurements via the dipolar interaction are fundamental to the application of nuclear magnetic resonance (NMR) to molecular structure determination, but they provide information on only the absolute distance r and polar angle θ between spins. In this Letter, we present a protocol to also r... [Phys. Rev. Lett. 121, 170801] Published Fri Oct 26, 2018

Description: Author(s): A. Cavaillès, H. Le Jeannic, J. Raskop, G. Guccione, D. Markham, E. Diamanti, M. D. Shaw, V. B. Verma, S. W. Nam, and J. Laurat Einstein-Podolsky-Rosen steering is known to be a key resource for one-sided device-independent quantum information protocols. Here we demonstrate steering using hybrid entanglement between continuous- and discrete-variable optical qubits. To this end, we report on suitable steering inequalities and... [Phys. Rev. Lett. 121, 170403] Published Fri Oct 26, 2018

Description: Author(s): Joseph Bowles, Ivan Šupić, Daniel Cavalcanti, and Antonio Acín We present a method to certify the entanglement of all entangled quantum states in a device-independent way. This is achieved by placing the state in a quantum network and constructing a correlation inequality based on an entanglement witness for the state. Our method is device independent, in the s... [Phys. Rev. Lett. 121, 180503] Published Mon Oct 29, 2018

Description: Author(s): Rukuan Wu and Zhaoxin Liang Beliaev damping provides a fundamental mechanism for dissipation of quasiparticles. Previous research has shown that the two-component internal degrees of freedom has no nontrivial effect on Beliaev damping. Here we provide the first example where the spinor nature of Bose gases can manifest itself ... [Phys. Rev. Lett. 121, 180401] Published Tue Oct 30, 2018

Description: Author(s): Yotam Shapira, Ravid Shaniv, Tom Manovitz, Nitzan Akerman, and Roee Ozeri High-fidelity two-qubit entangling gates play an important role in many quantum information processing tasks and are a necessary building block for constructing a universal quantum computer. Such high-fidelity gates have been demonstrated on trapped-ion qubits; however, control errors and noise in g... [Phys. Rev. Lett. 121, 180502] Published Thu Nov 01, 2018

Description: Author(s): Stefanie J. Beale, Joel J. Wallman, Mauricio Gutiérrez, Kenneth R. Brown, and Raymond Laflamme Typical studies of quantum error correction assume probabilistic Pauli noise, largely because it is relatively easy to analyze and simulate. Consequently, the effective logical noise due to physically realistic coherent errors is relatively unknown. Here, we prove that encoding a system in a stabili... [Phys. Rev. Lett. 121, 190501] Published Mon Nov 05, 2018

Description: Author(s): Fuxiang Li, Vladimir Y. Chernyak, and Nikolai A. Sinitsyn We solve a model that has basic features that are desired for quantum annealing computations: entanglement in the ground state, controllable annealing speed, ground state energy separated by a gap during the whole evolution, and a programmable computational problem that is encoded by parameters of t... [Phys. Rev. Lett. 121, 190601] Published Tue Nov 06, 2018

Description: Author(s): Adolfo del Campo When a quantum phase transition is crossed in finite time, critical slowing down leads to the breakdown of adiabatic dynamics and the formation of topological defects. The average density of defects scales with the quench rate following a universal power law predicted by the Kibble-Zurek mechanism. ... [Phys. Rev. Lett. 121, 200601] Published Wed Nov 14, 2018

Description: Author(s): Max Schemmer and Isabelle Bouchoule We report the demonstration of cooling by three-body losses in a Bose gas. We use a harmonically confined one-dimensional (1D) Bose gas in the quasicondensate regime and, as the atom number decreases under the effect of three-body losses, the temperature T drops up to a factor of 4. The ratio k B T / ( m ... [Phys. Rev. Lett. 121, 200401] Published Fri Nov 16, 2018

Description: Author(s): Hepeng Yao, David Clément, Anna Minguzzi, Patrizia Vignolo, and Laurent Sanchez-Palencia The universal Tan relations connect a variety of microscopic features of many-body quantum systems with two-body contact interactions to a single quantity, called the contact. The latter has become pivotal in the description of quantum gases. We provide a complete characterization of the Tan contact... [Phys. Rev. Lett. 121, 220402] Published Tue Nov 27, 2018

Description: Author(s): Kok Chuan Tan and Hyunseok Jeong We show that the symmetric portion of correlated coherence is always a valid quantifier of entanglement, and that this property is independent of the particular choice of coherence measure. This leads to an infinitely large class of coherence based entanglement monotones, which is always computable ... [Phys. Rev. Lett. 121, 220401] Published Tue Nov 27, 2018

Description: Author(s): Hiroyuki Endo, Chisa Hotta, and Akira Shimizu We propose a self-validating scheme to calculate the unbiased responses of quantum many-body systems to external fields of arbitrary strength at any temperature. By switching on a specified field to a thermal pure quantum state of an isolated system, and tracking its time evolution, one can observe ... [Phys. Rev. Lett. 121, 220601] Published Wed Nov 28, 2018

Description: Author(s): Christoph Georges, Jayson G. Cosme, Ludwig Mathey, and Andreas Hemmerich We demonstrate a light-induced formation of coherence in a cold atomic gas system that utilizes the suppression of a competing density wave (DW) order. The condensed atoms are placed in an optical cavity and pumped by an external optical standing wave, which induces a long-range interaction mediated... [Phys. Rev. Lett. 121, 220405] Published Thu Nov 29, 2018

Description: Author(s): Martin Šiler, Luca Ornigotti, Oto Brzobohatý, Petr Jákl, Artem Ryabov, Viktor Holubec, Pavel Zemánek, and Radim Filip Stochastic motion of particles in a highly unstable potential generates a number of diverging trajectories leading to undefined statistical moments of the particle position. This makes experiments challenging and breaks down a standard statistical analysis of unstable mechanical processes and their ... [Phys. Rev. Lett. 121, 230601] Published Mon Dec 03, 2018

Description: Author(s): Shane Mansfield and Elham Kashefi We introduce a notion of contextuality for transformations in sequential contexts, distinct from the Bell-Kochen-Specker and Spekkens notions of contextuality. Within a transformation-based model for quantum computation we show that strong sequential-transformation contextuality is necessary and suf... [Phys. Rev. Lett. 121, 230401] Published Mon Dec 03, 2018

Description: Author(s): Adrián A. Budini For classical Markovian stochastic systems, past and future events become statistically independent when conditioned to a given state at the present time. Memory non-Markovian effects break this condition, inducing a nonvanishing conditional past-future correlation. Here, this classical memory indic... [Phys. Rev. Lett. 121, 240401] Published Tue Dec 11, 2018

Description: Author(s): Vojtěch Havlíček and Sergii Strelchuk Permutational quantum computing (PQC) [ Quantum Inf. Comput. , 10 , 470–497 (2010)] is a natural quantum computational model conjectured to capture nonclassical aspects of quantum computation. An argument backing this conjecture was the observation that there was no efficient classical algorithm for es... [Phys. Rev. Lett. 121, 060505] Published Wed Aug 08, 2018

Description: Author(s): Geng Chen, Lijian Zhang, Wen-Hao Zhang, Xing-Xiang Peng, Liang Xu, Zhao-Di Liu, Xiao-Ye Xu, Jian-Shun Tang, Yong-Nan Sun, De-Yong He, Jin-Shi Xu, Zong-Quan Zhou, Chuan-Feng Li, and Guang-Can Guo It has been suggested that both quantum superpositions and nonlinear interactions are important resources for quantum metrology. However, to date the different roles that these two resources play in the precision enhancement are not well understood. Here, we experimentally demonstrate a Heisenberg-s... [Phys. Rev. Lett. 121, 060506] Published Wed Aug 08, 2018

Description: Author(s): Giacomo Guarnieri, Michal Kolář, and Radim Filip We identify sufficient conditions on the structure of the interaction Hamiltonian between a two-level quantum system and a thermal bath that, without any external drive or coherent measurement, guarantee the generation of steady-state coherences (SSC). The SSC obtained this way, remarkably, turn out... [Phys. Rev. Lett. 121, 070401] Published Wed Aug 15, 2018

Description: Author(s): Robert J. Lewis-Swan, Matthew A. Norcia, Julia R. K. Cline, James K. Thompson, and Ana Maria Rey Cavity QED is a promising avenue for the deterministic generation of entangled and spin-squeezed states for quantum metrology. One archetypal scheme generates squeezing via collective one-axis twisting interactions. However, we show that in implementations using optical transitions in long-lived ato... [Phys. Rev. Lett. 121, 070403] Published Thu Aug 16, 2018