Temperature and coupling dependence of the universal contact intensity for an ultracold Fermi gas
arXiv:1005.1158 · doi:10.1103/PhysRevA.82.021605
Abstract
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 Tc 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.
5 pages, 5 figures
References in corpus (11)
- Observation of pseudogap behavior in a strongly interacting Fermi gas
- Exact Relations for a Strongly-interacting Fermi Gas from the Operator Product Expansion
- Verification of universal relations in a strongly interacting Fermi gas
- Number of closed-channel molecules in the BEC-BCS crossover
- Universal Properties of the Ultra-Cold Fermi Gas
- BCS-BEC crossover at finite temperature in the broken-symmetry phase
- Radio-Frequency Transitions on Weakly-Bound Ultracold Molecules
- Enhanced paraconductivity-like fluctuations in the radio frequency spectra of ultracold Fermi atoms
- Short-range correlations and entropy in ultracold atomic Fermi gases
- Competition between final-state and pairing-gap effects in the radio-frequency spectra of ultracold Fermi atoms
- Popov approximation for composite bosons in the BCS-BEC crossover
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- Momentum Distribution and Contact of the Unitary Fermi gas
- Universal contact of strongly interacting fermions at finite temperatures
- Contact and sum-rules in a near-uniform Fermi gas at unitarity
- Quantum critical transport in the unitary Fermi gas
- Temperature dependence of the pair coherence and healing lengths for a fermionic superfluid throughout the BCS-BEC crossover
- Critical behaviours of contact near phase transitions
- Universality of the unitary Fermi gas: A few-body perspective
- Condensed phase of Bose-Fermi mixtures with a pairing interaction
- Expansion of harmonically trapped interacting particles and time dependence of the contact
- Tan contact and universal high momentum behavior of the fermion propagator in the BCS-BEC crossover
- The fourth- and fifth-order virial coefficients from weak-coupling to unitarity
- BCS-BEC Crossover and Pairing Fluctuations in a Two Band Superfluid/Superconductor: A T Matrix Approach
- Three-body contact for fermions. I. General relations
- Universal Relations for Fermions with Large Scattering Length