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  • 1
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    Quantum control of spin correlations in ultracold lattice gases (2013)
    American Physical Society (APS)
    Details
    Publication Date: 2013-02-09
    Description: Author(s): P. Hauke, R. J. Sewell, M. W. Mitchell, and M. Lewenstein We describe a technique for the preparation of quantum spin correlations in a lattice gas of ultracold atoms using an atom-light interaction of the kind routinely employed in quantum spin polarization spectroscopy. Our method is based on entropic cooling via quantum nondemolition measurement and fee... [Phys. Rev. A 87, 021601] Published Fri Feb 08, 2013
    Keywords: Matter waves and collective properties of cold atoms and molecules
    Print ISSN: 1050-2947
    Electronic ISSN: 1094-1622
    Topics: Physics
    Published by American Physical Society (APS)
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  • 2
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    Efficient Quantification of Non-Gaussian Spin Distributions (2012)
    American Physical Society (APS)
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    Publication Date: 2012-05-05
    Description: Author(s): B. Dubost, M. Koschorreck, M. Napolitano, N. Behbood, R. J. Sewell, and M. W. Mitchell We study theoretically and experimentally the quantification of non-Gaussian distributions via nondestructive measurements. Using the theory of cumulants, their unbiased estimators, and the uncertainties of these estimators, we describe a quantification which is simultaneously efficient, unbiased by... [Phys. Rev. Lett. 108, 183602] Published Fri May 04, 2012
    Keywords: Atomic, Molecular, and Optical Physics
    Print ISSN: 0031-9007
    Electronic ISSN: 1079-7114
    Topics: Physics
    Published by American Physical Society (APS)
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  • 3
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    Volcanic-plutonic connections in a tilted nested caldera complex in Hong Kong (2012)
    Wiley
    Details
    Publication Date: 2012-01-12
    Description: Exceptional exposures of four, precisely dated, Middle Jurassic to Early Cretaceous, silicic volcanic centers and their plutonic equivalents in Hong Kong have provided an excellent opportunity to examine close connections in time and space between magma chambers and their overlying calderas. Here, we describe a ∼14 km crustal section through a collapsed caldera in southeastern Hong Kong where the intracaldera fill suggests that the magmatic discharge was of supereruption scale. The main subvolcanic components that link a magma chamber with surface are revealed by well-established field relationships, supplemented by high precision geochronology, whole-rock geochemistry, and geophysical data. Exposures and outcrop patterns reveal kilometer-scale caldera subsidence and evidence of the simultaneous evacuation of hundreds of cubic kilometers of high-silica rhyolite magma through dike-like conduits from a shallow subcrustal reservoir. The resultant volcanotectonic depression, within which is preserved a single cooling unit of massively columnar-jointed densely welded tuff (High Island tuff), is interpreted to form part of a larger tilted Early Cretaceous nested caldera complex. The High Island eruption signaled the end of a 24 Myr-period of voluminous, pulsed Middle Jurassic to Early Cretaceous silicic magmatism in the Hong Kong region characterized by four discrete ignimbrite ‘flare-ups’.
    Electronic ISSN: 1525-2027
    Topics: Chemistry and Pharmacology , Geosciences , Physics
    Published by Wiley on behalf of American Geophysical Union (AGU).
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  • 4
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    Generation of Macroscopic Singlet States in a Cold Atomic Ensemble (2014)
    American Physical Society (APS)
    Details
    Publication Date: 2014-08-26
    Description: Author(s): N. Behbood, F. Martin Ciurana, G. Colangelo, M. Napolitano, Géza Tóth, R. J. Sewell, and M. W. Mitchell A spin entangled system of more than a million laser cooled atoms has been created using spin measurements along three orthogonal axes – the first measurement-induced spin squeezing to a singlet state. [Phys. Rev. Lett. 113, 093601] Published Mon Aug 25, 2014
    Keywords: Atomic, Molecular, and Optical Physics
    Print ISSN: 0031-9007
    Electronic ISSN: 1079-7114
    Topics: Physics
    Published by American Physical Society (APS)
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  • 5
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    Summer monsoon–induced upwelling dominated coastal sea surface temperature variations in the northern South China Sea over the last two millennia (2019)
    Sage
    Details
    Publication Date: 2019
    Description: The Holocene, Ahead of Print. 〈br/〉
    Print ISSN: 0959-6836
    Electronic ISSN: 1477-0911
    Topics: Geography , Geosciences
    Published by Sage
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  • 6
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    NINJA connects the co-repressor TOPLESS to jasmonate signalling (2010)
    Nature Publishing Group (NPG)
    Details
    Publication Date: 2010-04-03
    Description: Jasmonoyl-isoleucine (JA-Ile) is a plant hormone that regulates a broad array of plant defence and developmental processes. JA-Ile-responsive gene expression is regulated by the transcriptional activator MYC2 that interacts physically with the jasmonate ZIM-domain (JAZ) repressor proteins. On perception of JA-Ile, JAZ proteins are degraded and JA-Ile-dependent gene expression is activated. The molecular mechanisms by which JAZ proteins repress gene expression remain unknown. Here we show that the Arabidopsis JAZ proteins recruit the Groucho/Tup1-type co-repressor TOPLESS (TPL) and TPL-related proteins (TPRs) through a previously uncharacterized adaptor protein, designated Novel Interactor of JAZ (NINJA). NINJA acts as a transcriptional repressor whose activity is mediated by a functional TPL-binding EAR repression motif. Accordingly, both NINJA and TPL proteins function as negative regulators of jasmonate responses. Our results point to TPL proteins as general co-repressors that affect multiple signalling pathways through the interaction with specific adaptor proteins. This new insight reveals how stress-related and growth-related signalling cascades use common molecular mechanisms to regulate gene expression in plants.〈br /〉〈br /〉〈a href="https://www.ncbi.nlm.nih.gov/pmc/articles/PMC2849182/" target="_blank"〉〈img src="https://static.pubmed.gov/portal/portal3rc.fcgi/4089621/img/3977009" border="0"〉〈/a〉   〈a href="https://www.ncbi.nlm.nih.gov/pmc/articles/PMC2849182/" target="_blank"〉This paper as free author manuscript - peer-reviewed and accepted for publication〈/a〉〈br /〉〈br /〉〈span class="detail_caption"〉Notes: 〈/span〉Pauwels, Laurens -- Barbero, Gemma Fernandez -- Geerinck, Jan -- Tilleman, Sofie -- Grunewald, Wim -- Perez, Amparo Cuellar -- Chico, Jose Manuel -- Bossche, Robin Vanden -- Sewell, Jared -- Gil, Eduardo -- Garcia-Casado, Gloria -- Witters, Erwin -- Inze, Dirk -- Long, Jeff A -- De Jaeger, Geert -- Solano, Roberto -- Goossens, Alain -- R01 GM072764/GM/NIGMS NIH HHS/ -- R01 GM072764-06/GM/NIGMS NIH HHS/ -- England -- Nature. 2010 Apr 1;464(7289):788-91. doi: 10.1038/nature08854.〈br /〉〈span class="detail_caption"〉Author address: 〈/span〉Department of Plant Systems Biology, Flanders Institute for Biotechnology (VIB), Technologiepark 927, B-9052 Gent, Belgium.〈br /〉〈span class="detail_caption"〉Record origin:〈/span〉 〈a href="http://www.ncbi.nlm.nih.gov/pubmed/20360743" target="_blank"〉PubMed〈/a〉
    Keywords: Arabidopsis/cytology/*drug effects/*metabolism ; Arabidopsis Proteins/genetics/*metabolism ; Cyclopentanes/antagonists & inhibitors/*pharmacology ; Gene Expression Profiling ; Gene Expression Regulation, Plant ; Models, Biological ; Oxylipins/antagonists & inhibitors/*pharmacology ; Plants, Genetically Modified ; Protein Binding ; Repressor Proteins/genetics/*metabolism ; Signal Transduction/*drug effects ; Two-Hybrid System Techniques
    Print ISSN: 0028-0836
    Electronic ISSN: 1476-4687
    Topics: Biology , Chemistry and Pharmacology , Medicine , Natural Sciences in General , Physics
    Published by Nature Publishing Group (NPG)
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  • 7
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    Summer monsoon–induced upwelling dominated coastal sea surface temperature variations in the northern South China Sea over the last two millennia (2019)
    Sage
    Details
    Publication Date: 2019
    Description: The Holocene, Ahead of Print. 〈br/〉
    Print ISSN: 0959-6836
    Electronic ISSN: 1477-0911
    Topics: Geography , Geosciences
    Published by Sage
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  • 8
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    Interaction-based quantum metrology showing scaling beyond the Heisenberg limit (2011)
    Nature Publishing Group (NPG)
    Details
    Publication Date: 2011-03-25
    Description: Quantum metrology aims to use entanglement and other quantum resources to improve precision measurement. An interferometer using N independent particles to measure a parameter chi can achieve at best the standard quantum limit of sensitivity, deltachi proportional, variant N(-1/2). However, using N entangled particles and exotic states, such an interferometer can in principle achieve the Heisenberg limit, deltachi proportional, variant N(-1). Recent theoretical work has argued that interactions among particles may be a valuable resource for quantum metrology, allowing scaling beyond the Heisenberg limit. Specifically, a k-particle interaction will produce sensitivity deltachi proportional, variant N(-k) with appropriate entangled states and deltachi proportional, variant N(-(k-1/2)) even without entanglement. Here we demonstrate 'super-Heisenberg' scaling of deltachi proportional, variant N(-3/2) in a nonlinear, non-destructive measurement of the magnetization of an atomic ensemble. We use fast optical nonlinearities to generate a pairwise photon-photon interaction (corresponding to k = 2) while preserving quantum-noise-limited performance. We observe super-Heisenberg scaling over two orders of magnitude in N, limited at large numbers by higher-order nonlinear effects, in good agreement with theory. For a measurement of limited duration, super-Heisenberg scaling allows the nonlinear measurement to overtake in sensitivity a comparable linear measurement with the same number of photons. In other situations, however, higher-order nonlinearities prevent this crossover from occurring, reflecting the subtle relationship between scaling and sensitivity in nonlinear systems. Our work shows that interparticle interactions can improve sensitivity in a quantum-limited measurement, and experimentally demonstrates a new resource for quantum metrology.〈br /〉〈span class="detail_caption"〉Notes: 〈/span〉Napolitano, M -- Koschorreck, M -- Dubost, B -- Behbood, N -- Sewell, R J -- Mitchell, M W -- England -- Nature. 2011 Mar 24;471(7339):486-9. doi: 10.1038/nature09778.〈br /〉〈span class="detail_caption"〉Author address: 〈/span〉ICFO-Institut de Ciencies Fotoniques, Mediterranean Technology Park, 08860 Castelldefels, Barcelona, Spain. mario.napolitano@icfo.es〈br /〉〈span class="detail_caption"〉Record origin:〈/span〉 〈a href="http://www.ncbi.nlm.nih.gov/pubmed/21430776" target="_blank"〉PubMed〈/a〉
    Print ISSN: 0028-0836
    Electronic ISSN: 1476-4687
    Topics: Biology , Chemistry and Pharmacology , Medicine , Natural Sciences in General , Physics
    Published by Nature Publishing Group (NPG)
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  • 9
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    Plant development. Genetic control of distal stem cell fate within root and embryonic meristems (2015)
    American Association for the Advancement of Science (AAAS)
    Details
    Publication Date: 2015-01-24
    Description: The root meristem consists of populations of distal and proximal stem cells and an organizing center known as the quiescent center. During embryogenesis, initiation of the root meristem occurs when an asymmetric cell division of the hypophysis forms the distal stem cells and quiescent center. We have identified NO TRANSMITTING TRACT (NTT) and two closely related paralogs as being required for the initiation of the root meristem. All three genes are expressed in the hypophysis, and their expression is dependent on the auxin-signaling pathway. Expression of these genes is necessary for distal stem cell fate within the root meristem, whereas misexpression is sufficient to transform other stem cell populations to a distal stem cell fate in both the embryo and mature roots.〈br /〉〈span class="detail_caption"〉Notes: 〈/span〉Crawford, Brian C W -- Sewell, Jared -- Golembeski, Greg -- Roshan, Carmel -- Long, Jeff A -- Yanofsky, Martin F -- 5 R01 GM072764/GM/NIGMS NIH HHS/ -- R01 GM072764/GM/NIGMS NIH HHS/ -- New York, N.Y. -- Science. 2015 Feb 6;347(6222):655-9. doi: 10.1126/science.aaa0196. Epub 2015 Jan 22.〈br /〉〈span class="detail_caption"〉Author address: 〈/span〉Division of Biological Sciences, University of California San Diego, La Jolla, CA 92093, USA. ; Department of Molecular, Cell and Developmental Biology, University of California Los Angeles, Los Angeles, CA 90095, USA. ; Department of Molecular, Cell and Developmental Biology, University of California Los Angeles, Los Angeles, CA 90095, USA. marty@ucsd.edu jeffalong@ucla.edu. ; Division of Biological Sciences, University of California San Diego, La Jolla, CA 92093, USA. marty@ucsd.edu jeffalong@ucla.edu.〈br /〉〈span class="detail_caption"〉Record origin:〈/span〉 〈a href="http://www.ncbi.nlm.nih.gov/pubmed/25612610" target="_blank"〉PubMed〈/a〉
    Keywords: Arabidopsis/embryology/genetics ; Arabidopsis Proteins/genetics/*physiology ; *Gene Expression Regulation, Developmental ; *Gene Expression Regulation, Plant ; Indoleacetic Acids/pharmacology ; Meristem/cytology/*embryology ; Mutation ; Plant Development/*genetics ; Stem Cells/cytology/drug effects/*physiology ; Transcription Factors/genetics/*physiology
    Print ISSN: 0036-8075
    Electronic ISSN: 1095-9203
    Topics: Biology , Chemistry and Pharmacology , Computer Science , Medicine , Natural Sciences in General , Physics
    Published by American Association for the Advancement of Science (AAAS)
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  • 10
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    Entanglement-Enhanced Phase Estimation without Prior Phase Information (2017)
    American Physical Society (APS)
    Details
    Publication Date: 2017-06-10
    Description: Author(s): G. Colangelo, F. Martin Ciurana, G. Puentes, M. W. Mitchell, and R. J. Sewell We study the generation of planar quantum squeezed (PQS) states by quantum nondemolition (QND) measurement of an ensemble of Rb 87 atoms with a Poisson distributed atom number. Precise calibration of the QND measurement allows us to infer the conditional covariance matrix describing the F y and F z com… [Phys. Rev. Lett. 118, 233603] Published Fri Jun 09, 2017
    Keywords: Atomic, Molecular, and Optical Physics
    Print ISSN: 0031-9007
    Electronic ISSN: 1079-7114
    Topics: Physics
    Published by American Physical Society (APS)
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