Results 41 to 50 of about 8,731 (217)
Condensed Matter, 2021 Superfluidity has been predicted and now observed in a number of different electron-hole double-layer semiconductor heterostructures. In some of the heterostructures, such as GaAs and Ge-Si electron-hole double quantum wells, there is a strong mismatch ...
Sara Conti +3 more
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BCS-BEC crossover of atomic Fermi superfluid in a spherical bubble trap [PDF]
Physical Review A, 2021 We present a theory of a two-component atomic Fermi gas with tunable attractive contact interactions on a spherical shell going through the BCS Bose Einstein condensation (BEC) crossover, inspired by the realizations of spherical bubble traps for ...
Yan He, Hao Guo, C. Chien
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BCS-BEC crossover with unequal-mass fermions [PDF]
Physical Review A, 2010 We investigate the crossover from BCS pairing to molecular BEC in an atomic gas with two fermion species with masses $m_\up \ne m_\dn$ tuned through a Feshbach resonance. We present results for the T=0 equation of state as a function of the scattering length including the effects of Gaussian fluctuations about the mean field ground state.
Diener, Roberto B., Randeria, Mohit
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Rabi Coupled Fermions in the BCS–BEC Crossover
Condensed Matter, 2022 We investigate the three-dimensional BCS–BEC crossover in the presence of a Rabi coupling, which strongly affects several properties of the system, such as the chemical potential, the pairing gap and the superfluid density.
Luca Dell’Anna +2 more
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Universal correlations along the BEC-BCS crossover
New Journal of Physics, 2023 Universality of the long-distance behavior across the Bardeen–Cooper–Schrieffer (BEC)-Bose–Einstein condensate (BCS) smooth transition for two-body density correlation functions and the Cooper-pair probability density is demonstrated in a balanced ...
J C Obeso-Jureidini +4 more
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Hidden Pseudogap and Excitation Spectra in a Strongly Coupled Two-Band Superfluid/Superconductor
Condensed Matter, 2021 We investigate single-particle excitation properties in the normal state of a two-band superconductor or superfluid throughout the Bardeen–Cooper–Schrieffer (BCS) to Bose–Einstein-condensation (BEC) crossover, within the many-body T-matrix approximation ...
Hiroyuki Tajima +2 more
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Resonant pair-exchange scattering and BCS-BEC crossover in a system composed of dispersive and heavy incipient bands: A Feshbach analogy [PDF]
Physical Review Research, 2021 We theoretically show that a two-band system with very different masses harbors a resonant pair scattering that leads to novel pairing properties, as highlighted by the Bardeen-Cooper-Schrieffer (BCS) to Bose-Einstein condensation (BEC) crossover.
Kazunari Ochi +3 more
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BCS–BEC CROSSOVER IN RELATIVISTIC FERMI SYSTEMS [PDF]
International Journal of Modern Physics A, 2013 We review the BCS–BEC crossover in relativistic Fermi systems, including the QCD matter at finite density. In the first part, we study the BCS–BEC crossover in a relativistic four-fermion interaction model and show how the relativistic effect affects the BCS–BEC crossover.
He, Lianyi, Mao, Shijun, Zhuang, Pengfei
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Flow equations for the BCS-BEC crossover [PDF]
Physical Review A, 2007 The functional renormalisation group is used for the BCS-BEC crossover in gases of ultracold fermionic atoms. In a simple truncation, we see how universality and an effective theory with composite bosonic di-atom states emerge. We obtain a unified picture of the whole phase diagram. The flow reflects different effective physics at different scales.
Diehl, S. +3 more
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Critical Temperature in the BCS-BEC Crossover with Spin-Orbit Coupling
Condensed Matter, 2021 We review the study of the superfluid phase transition in a system of fermions whose interaction can be tuned continuously along the crossover from Bardeen–Cooper–Schrieffer (BCS) superconducting phase to a Bose–Einstein condensate (BEC), also in the ...
Luca Dell’Anna, Stefano Grava
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