What is a Cooper pair ?
Gerardo E. Ortiz, J. Dukelsky
Abstract
Open-access reader
Gerardo E. Ortiz, J. Dukelsky
Abstract
Open-access reader
Recently, the nature of Cooper pairs in the BCS-BEC crossover has regained attention due to the observation of a large fraction of preformed fermion pairs on the BCS side of the Feshbach resonance in ultracold atomic Fermi gases. While several theoretical explanations were proposed, the interpretations are still controversial. The root of the controversy is understanding what represents a Cooper pair in a correlated Fermi system. This paper discusses these issues at the most elementary level.
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Recently, the nature of Cooper pairs in the BCS-BEC crossover has regained attention due to the observation of a large fraction of preformed fermion pairs on the BCS side of the Feshbach resonance in ultracold atomic Fermi gases. While several theoretical explanations were proposed, the interpretations are still controversial. The root of the controversy is understanding what represents a Cooper pair in a correlated Fermi system. This paper discusses these issues at the most elementary level.
Key concepts: Cooper pair, Feshbach resonance, Crossover, Physics, Fermion, Fermi Gamma-ray Space Telescope, Condensed matter physics, Quantum mechanics