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Simulation of two-boson bound states using arrays of driven-dissipative coupled linear optical resonators (2018)

Maxim A. Gorlach, Marco Di Liberto, Alessio Recati, Iacopo Carusotto, Alexander N. Poddubny, and Chiara Menotti

American Physical Society (APS)

In: Physical Review A

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Publication Date: 2018-12-21

Description: Author(s): Maxim A. Gorlach, Marco Di Liberto, Alessio Recati, Iacopo Carusotto, Alexander N. Poddubny, and Chiara Menotti We present a strategy based on two-dimensional arrays of coupled linear optical resonators to investigate the two-body physics of interacting bosons in one-dimensional lattices. In particular, we want to address the bound pairs in topologically nontrivial Su-Schrieffer-Heeger arrays. Taking advantag... [Phys. Rev. A 98, 063625] Published Thu Dec 20, 2018

Keywords: Matter waves and collective properties of cold atoms and molecules

Print ISSN: 1050-2947

Electronic ISSN: 1094-1622

Topics: Physics

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Production of a degenerate Fermi-Fermi mixture of dysprosium and potassium atoms (2018)

Cornelis Ravensbergen, Vincent Corre, Elisa Soave, Marian Kreyer, Emil Kirilov, and Rudolf Grimm

American Physical Society (APS)

In: Physical Review A

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Publication Date: 2018-12-21

Description: Author(s): Cornelis Ravensbergen, Vincent Corre, Elisa Soave, Marian Kreyer, Emil Kirilov, and Rudolf Grimm We report on the realization of a mixture of fermionic Dy 161 and fermionic K 40 where both species are deep in the quantum-degenerate regime. Both components are spin polarized in their absolute ground states, and the low temperatures are achieved by means of evaporative cooling of the dipolar dyspro... [Phys. Rev. A 98, 063624] Published Thu Dec 20, 2018

Keywords: Matter waves and collective properties of cold atoms and molecules

Print ISSN: 1050-2947

Electronic ISSN: 1094-1622

Topics: Physics

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Dipolar-coupled moment correlations in clusters of magnetic nanoparticles (2018)

P. Bender, E. Wetterskog, D. Honecker, J. Fock, C. Frandsen, C. Moerland, L. K. Bogart, O. Posth, W. Szczerba, H. Gavilán, R. Costo, M. T. Fernández-Díaz, D. González-Alonso, L. Fernández Barquín, and C. Johansson

American Physical Society (APS)

In: Physical Review B

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Publication Date: 2018-12-21

Description: Author(s): P. Bender, E. Wetterskog, D. Honecker, J. Fock, C. Frandsen, C. Moerland, L. K. Bogart, O. Posth, W. Szczerba, H. Gavilán, R. Costo, M. T. Fernández-Díaz, D. González-Alonso, L. Fernández Barquín, and C. Johansson Here, we resolve the nature of the moment coupling between 10-nm dimercaptosuccinic acid–coated magnetic nanoparticles. The individual iron oxide cores were composed of 〉 95 % maghemite and agglomerated to clusters. At room temperature the ensemble behaved as a superparamagnet according to Mössbaue... [Phys. Rev. B 98, 224420] Published Thu Dec 20, 2018

Keywords: Magnetism

Print ISSN: 1098-0121

Electronic ISSN: 1095-3795

Topics: Physics

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Thermodynamics and spin mapping of quantum excitations in a Heisenberg spin heptamer (2018)

A. Roxburgh and J. T. Haraldsen

American Physical Society (APS)

In: Physical Review B

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Publication Date: 2018-12-21

Description: Author(s): A. Roxburgh and J. T. Haraldsen In this study, we examine the thermodynamics and spin dynamics of spin-1/2 and spin-3/2 heptamers. Through an exact diagonalization of the isotropic Heisenberg Hamiltonian, we find the closed-form, analytical representations for thermodynamic properties, spin excitations, and neutron-scattering stru... [Phys. Rev. B 98, 214434] Published Thu Dec 20, 2018

Keywords: Magnetism

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Composite quasiparticles in strongly correlated dipolar Fermi liquids (2018)

Iran Seydi, Saeed H. Abedinpour, Reza Asgari, and B. Tanatar

American Physical Society (APS)

In: Physical Review A

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Publication Date: 2018-12-20

Description: Author(s): Iran Seydi, Saeed H. Abedinpour, Reza Asgari, and B. Tanatar Strong particle-plasmon interaction in electronic systems can lead to composite hole-plasmon excitations. We investigate the emergence of similar composite quasiparticles in ultracold dipolar Fermi liquids originating from the long-range dipole-dipole interaction. We use the G 0 W technique with an ef... [Phys. Rev. A 98, 063623] Published Wed Dec 19, 2018

Keywords: Matter waves and collective properties of cold atoms and molecules

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Electronic ISSN: 1094-1622

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Blocked populations in ring-shaped optical lattices (2018)

M. Nigro, P. Capuzzi, and D. M. Jezek

American Physical Society (APS)

In: Physical Review A

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Publication Date: 2018-12-20

Description: Author(s): M. Nigro, P. Capuzzi, and D. M. Jezek We study a special dynamical regime of a Bose-Einstein condensate in a ring-shaped lattice where the populations in each site remain constant during the time evolution. The states in this regime are characterized by equal occupation numbers in alternate wells and nontrivial phases, while the phase d... [Phys. Rev. A 98, 063622] Published Wed Dec 19, 2018

Keywords: Matter waves and collective properties of cold atoms and molecules

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Creating, probing, and manipulating fractionally charged excitations of fractional Chern insulators in optical lattices (2018)

Mantas Račiūnas, F. Nur Ünal, Egidijus Anisimovas, and André Eckardt

American Physical Society (APS)

In: Physical Review A

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Publication Date: 2018-12-20

Description: Author(s): Mantas Račiūnas, F. Nur Ünal, Egidijus Anisimovas, and André Eckardt We propose a set of schemes to create and probe fractionally charged excitations of a fractional Chern insulator state in an optical lattice. This includes the creation of localized quasiparticles and quasiholes using both static local defects and the dynamical local insertion of synthetic flux quan... [Phys. Rev. A 98, 063621] Published Wed Dec 19, 2018

Keywords: Matter waves and collective properties of cold atoms and molecules

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Properties and application of SO(3) Majorana representation of spin: Equivalence with Jordan-Wigner transformation and exact ${Z}_{2}$ gauge theories for spin models (2018)

Jianlong Fu

American Physical Society (APS)

In: Physical Review B

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Publication Date: 2018-12-20

Description: Author(s): Jianlong Fu We explore the properties of the SO(3) Majorana representation of spin. Based on its nonlocal nature, it is shown that there is an equivalence between the SO(3) Majorana representation and the Jordan-Wigner transformation in one and two dimensions. From the relation between the SO(3) Majorana repres... [Phys. Rev. B 98, 214432] Published Wed Dec 19, 2018

Keywords: Magnetism

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Helical magnetism in Sr-doped $\mathrm{CaM}{\mathrm{n}}_{7}{\mathrm{O}}_{12}$ films (2018)

Amanda Huon, Anuradha M. Vibhakar, Alexander J. Grutter, Julie A. Borchers, Steven Disseler, Yaohua Liu, Wei Tian, Fabio Orlandi, Pascal Manuel, Dmitry D. Khalyavin, Yogesh Sharma, Andreas Herklotz, Ho Nyung Lee, Michael R. Fitzsimmons, Roger D. Johnson, and Steven J. May

American Physical Society (APS)

In: Physical Review B

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Publication Date: 2018-12-20

Description: Author(s): Amanda Huon, Anuradha M. Vibhakar, Alexander J. Grutter, Julie A. Borchers, Steven Disseler, Yaohua Liu, Wei Tian, Fabio Orlandi, Pascal Manuel, Dmitry D. Khalyavin, Yogesh Sharma, Andreas Herklotz, Ho Nyung Lee, Michael R. Fitzsimmons, Roger D. Johnson, and Steven J. May Noncollinear magnetism can play an important role in multiferroic materials but is relatively understudied in oxide heterostructures compared to their bulk counterparts. Using variable temperature magnetometry and neutron diffraction, we demonstrate the presence of helical magnetic ordering in CaM n 7 ... [Phys. Rev. B 98, 224419] Published Wed Dec 19, 2018

Keywords: Magnetism

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Neutron scattering investigation of rhenium orbital ordering in the $3d−5d$ double perovskite ${\mathrm{Ca}}_{2}{\mathrm{FeReO}}_{6}$ (2018)

Bo Yuan, J. P. Clancy, J. A. Sears, A. I. Kolesnikov, M. B. Stone, Z. Yamani, Choongjae Won, Namjung Hur, B. C. Jeon, T. W. Noh, Arun Paramekanti, and Young-June Kim

American Physical Society (APS)

In: Physical Review B

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Publication Date: 2018-12-20

Description: Author(s): Bo Yuan, J. P. Clancy, J. A. Sears, A. I. Kolesnikov, M. B. Stone, Z. Yamani, Choongjae Won, Namjung Hur, B. C. Jeon, T. W. Noh, Arun Paramekanti, and Young-June Kim We have carried out inelastic neutron scattering experiments to study magnetic excitations in the ordered double perovskite Ca 2 FeReO 6 . We have found a well-defined magnon mode with a bandwidth of ∼ 50 meV below the ferrimagnetic ordering temperature ( T c ∼ 520 K), similar to the previously studied Ba 2 Fe... [Phys. Rev. B 98, 214433] Published Wed Dec 19, 2018

Keywords: Magnetism

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