A study on the coexistence of BEC and BCS states
C. D. Hu
TL;DR
This paper investigates the coexistence of BEC and BCS states, emphasizing the importance of dynamic effects and proposing an equation of motion approach to analyze their relationship.
Contribution
It introduces an equation of motion method accounting for dynamic effects in the BEC-BCS crossover, revealing coexistence rather than a simple crossover.
Findings
BCS states and Bose-Einstein condensation always coexist
Dynamic effects of <b(t)> are significant in the crossover analysis
Proposed method calculates Green's functions considering dynamic effects
Abstract
We pointed out in this work that in dealing with the BEC-BCS crossover problem, the dynamic effect of <b(t)>is not negligible. Accordingly, an equation of motion approach was devised to calculate the Greens functions. Based on our result, we concluded that instead of crossover, BCS states and Bose-Einstein condensation always coexist.
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Taxonomy
TopicsQuantum and Classical Electrodynamics · Cold Atom Physics and Bose-Einstein Condensates · Quantum Mechanics and Non-Hermitian Physics