Short-distance and short-time structure of a unitary Fermi gas

Abstract

We consider the operator product expansions for unitarity fermions. We compute the dynamic structure factor S(q,w) at large frequency and wavenumber away from the one-particle peak. The overall normalization of S(q,w) is determined by Tan's contact parameter, and the dependence on q and w is obtained in closed analytic form. We also find energy deposited into the system by small, rapid variations of the inverse scattering length.

11 pages, 8 figures

References in corpus (4)

• Exact Relations for a Strongly-interacting Fermi Gas from the Operator Product Expansion
• Spectral Functions and rf Response of Ultracold Fermionic Atoms
• Universal Short-Distance Structure of the Single-Particle Spectral Function of Dilute Fermi Gases
• Enhanced paraconductivity-like fluctuations in the radio frequency spectra of ultracold Fermi atoms

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