Temperature and coupling dependence of the universal contact intensity for an ultracold Fermi gas

Journal Article · Sun Aug 15 00:00:00 EDT 2010 · Physical Review. A

DOI:https://doi.org/10.1103/PHYSREVA.82.021605· OSTI ID:21456937

Palestini, F; Perali, A; Pieri, P; Strinati, G C ^[1]

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1. Dipartimento di Fisica, Universita di Camerino, I-62032 Camerino (Italy)

Physical properties of an ultracold Fermi gas in the temperature-coupling phase diagram can be characterized by the contact intensity C, which enters the pair-correlation function at short distances and describes how the two-body problem merges into its surrounding. We show that the local order established by pairing fluctuations about the critical temperature T{sub c} of the superfluid transition considerably enhances the contact C in a temperature range where pseudogap phenomena are maximal. Our ab initio results for C in a trap compare well with recently available experimental data over a wide coupling range. An analysis is also provided for the effects of trap averaging on C.

• OSTI ID: 21456937
• Journal Information: Physical Review. A, Vol. 82, Issue 2; Other Information: DOI: 10.1103/PhysRevA.82.021605; (c) 2010 The American Physical Society; ISSN 1050-2947
• Country of Publication: United States
• Language: English

Related Subjects

75 CONDENSED MATTER PHYSICS
SUPERCONDUCTIVITY AND SUPERFLUIDITY
COMPARATIVE EVALUATIONS
CORRELATION FUNCTIONS
COUPLING
CRITICAL TEMPERATURE
DISTANCE
FERMI GAS
FLUCTUATIONS
PAIRING INTERACTIONS
PHASE DIAGRAMS
SUPERFLUIDITY
TEMPERATURE DEPENDENCE
TRAPS
TWO-BODY PROBLEM
DIAGRAMS
EVALUATION
FUNCTIONS
INFORMATION
INTERACTIONS
MANY-BODY PROBLEM
PHYSICAL PROPERTIES
THERMODYNAMIC PROPERTIES
TRANSITION TEMPERATURE
VARIATIONS