Results 191 to 200 of about 8,731 (217)
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2014
We have discussed bosonic and fermionic superfluids. The underlying mechanisms were, on the one hand, Bose-Einstein condensation (BEC) and, on the other hand, Cooper pairing according to Bardeen-Cooper-Schrieffer (BCS) theory. We have also mentioned that fermionic superfluidity is also a form of BEC because a Cooper pair can, in some sense, be ...
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We have discussed bosonic and fermionic superfluids. The underlying mechanisms were, on the one hand, Bose-Einstein condensation (BEC) and, on the other hand, Cooper pairing according to Bardeen-Cooper-Schrieffer (BCS) theory. We have also mentioned that fermionic superfluidity is also a form of BEC because a Cooper pair can, in some sense, be ...
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Finite-size effects in the two-dimensional BCS-BEC crossover
Physical review BWe study the finite-size effects on the BCS-BEC crossover in two dimensions, occurring in confined fermionic superfluids. We analyze several thermodynamic properties, such as the chemical potential, the energy gap and the superfluid density, taking into ...
M. Lanaro +3 more
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PAIRING CORRELATIONS IN UNSTABLE NUCLEI AND BCS-BEC CROSSOVER
International Journal of Modern Physics E, 2009We propose new types of density dependent contact pairing interaction which reproduce the pairing gaps in symmetric and neutron matters obtained by a microscopic treatment of the realistic nucleon-nucleon interaction. The BCS-BEC crossover of neutrons pairs in symmetric and asymmetric nuclear matters is studied by using these contact interactions.
Sagawa, H., Margueron, J., Hagino, K.
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Quantum fluctuations in the time-dependent BCS–BEC crossover
Philosophical Transactions of the Royal Society A: Mathematical, Physical and Engineering Sciences, 2008We describe the time-dependent formation of a molecular Bose–Einstein condensate from a BCS state of fermionic atoms as a result of slow sweeping through a Feshbach resonance. We apply a path integral approach for the molecules, and use two-body adiabatic approximations to solve the atomic evolution in the presence of the classical molecular fields ...
B M, Breid, J R, Anglin
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BCS-BEC crossover in Haldane model
2016We theoretically investigate BCS-BEC crossover in spinful Haldane model. We find there are two topologically distinct superfluidity phases which are characterized by chern number C=0 and 2, respectively. At half filling, the region of existing of the topological phase is extremely small.
Zhang, S, Xu, Z, Zhang, Y
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Two-dimensional attractive Hubbard model and the BCS-BEC crossover
Physical review B, 2022Rodrigo A. Fontenele +3 more
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Josephson Oscillation and Self-Trapping in a Fermi Superfluid Gas across the BCS-BEC Crossover
Journal of Low Temperature Physics, 2022J. Tokimoto, S. Tsuchiya, T. Nikuni
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Two-channel models of the BCS/BEC crossover
Proceedings of the International School of Physics “Enrico Fermi”1. Introduction; 2. Bose-Einstein condensation and superfluidity; 3. Description of a superfluid in a dilute atomic gas; 4. Breakdown of the mean-field picture—resonance superfluids; 5. Single-channel vs. two-channel approaches; 6. Poles of the molecular propagator; 7. The equivalent single-channel theory; 8.
Holland M., Wachter J.
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Gate-controlled BCS-BEC crossover in a two-dimensional superconductor
Science, 2021Yuji Nakagawa +2 more
exaly
Gas di fermi intrappolati: Crossover BCS-BEC
2006La ricerca nell'ambito del crossover BCS-BEC è attualmente molto attiva e coinvolge numerosi gruppi sia sperimentali che teorici. Non sarà quindi naturalmente possibile in questo articolo rappresentare tale ricerca in maniera esauriente e tantomeno definotiva.
STRINATI CALVANESE, Giancarlo +1 more
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