Results 21 to 30 of about 8,731 (217)
Relativistic BCS-BEC Crossover at Quark Level [PDF]
EPJ Web of Conferences, 2010 The non-relativistic G0G formalism of BCS-BEC crossover at finite temperature is extended to relativistic fermion systems. The theory recovers the BCS mean field approximation at zero temperature and the non-relativistic results in a proper limit.
Zhuang P., Mao S., He L.
doaj +2 more sources
SNS junctions along the BCS-BEC crossover [PDF]
Physical Review BWe present a theory of SNS junctions, a normal metal sandwiched between two superconductors, along the crossover from the BCS to the BEC regime. We calculate the Josephson current as a function of the chemical potential relative to the band edge in the ...
Gautam Rai +4 more
semanticscholar +3 more sources
BCS-BEC Crossover and Pairing Fluctuations in a Two Band Superfluid/Superconductor: A T Matrix Approach [PDF]
Condensed Matter, 2020 We investigate pairing fluctuation effects in a two band fermionic system, where a shallow band in the Bardeen−Cooper−Schrieffer−Bose−Einstein condensation (BCS-BEC) crossover regime is coupled with a weakly interacting deep band.
Hiroyuki Tajima +2 more
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Exactly Solvable BCS-BEC crossover Hamiltonians [PDF]
, 2013 We demonstrate a novel approach that allows the determination of very general classes of exactly solvable Hamiltonians via Bethe ansatz methods. This approach combines aspects of both the co-ordinate Bethe ansatz and algebraic Bethe ansatz.
Birrell, Andrew +2 more
core +2 more sources
Goldstone and Higgs Hydrodynamics in the BCS–BEC Crossover [PDF]
Condensed Matter, 2017 We discuss the derivation of a low-energy effective field theory of phase (Goldstone) and amplitude (Higgs) modes of the pairing field from a microscopic theory of attractive fermions.
Luca Salasnich
doaj +4 more sources
Critical Josephson current in BCS-BEC–crossover superfluids [PDF]
Physical Review A, 2019 We develop a microscopic model to describe the Josephson dynamics between two superfluid reservoirs of ultracold fermionic atoms which accounts for the dependence of the critical current on both the barrier height and the interaction strength along the ...
M. Zaccanti, W. Zwerger
semanticscholar +6 more sources
Thermoelectric signature of quantum critical phase in a doped spin-liquid candidate [PDF]
Nature Communications, 2023 Quantum spin liquid is a nontrivial magnetic state of longstanding interest, in which spins are strongly correlated and entangled but do not order; further intriguing is its doped version, which possibly hosts strange metal and unconventional ...
K. Wakamatsu +5 more
doaj +2 more sources
Magnetic field tuning of an excitonic insulator between the weak and strong coupling regimes in quantum limit graphite [PDF]
Scientific Reports, 2017 The excitonic insulator phase has long been predicted to form in proximity to a band gap opening in the underlying band structure. The character of the pairing is conjectured to crossover from weak (BCS-like) to strong coupling (BEC-like) as the ...
Z. Zhu +6 more
doaj +2 more sources
BEC-BCS crossover in a cold and magnetized two color NJL model [PDF]
Physical Review D, 2016 The BEC-BCS crossover for a NJL model with diquark interactions is studied in the presence of an external magnetic field. Particular attention is paid to different regularization schemes used in the literature.
Allen, P. G. +5 more
core +4 more sources
BCS-BEC Crossover in a Two-Dimensional Fermi Gas [PDF]
Physical Review Letters, 2011 4 pages, 4 ...
G. Bertaina, S. Giorgini
openaire +8 more sources