Renormalization group approach to the normal phase of 2D Fermi gases

Abstract

We present results on the effect of short-range, attractive interactions on the properties of balanced 2D Fermi gases in the non-superfluid (normal) phase. Our approach combines the renormalization group (RG) with perturbation theory, yielding observables such as the equation of state and compressibility. We find good agreement with recent experiments that measured the equation of state in trapped gases in the balanced regime, showing that these results are consistent with logarithmic corrections in the equation of state.

arXiv comment7 pages, 4 figures

References in corpus (26)

• Many-Body Physics with Ultracold Gases
• Theory of ultracold Fermi gases
• Bose-Einstein condensation of atoms in a uniform potential
• Revealing the Superfluid Lambda Transition in the Universal Thermodynamics of a Unitary Fermi Gas
• Homogeneous Atomic Fermi Gases
• Quantum critical scaling in graphene
• Observation of a pairing pseudogap in a two-dimensional Fermi gas
• Evolution of Fermion Pairing from Three to Two Dimensions
• Observation of the Berezinskii-Kosterlitz-Thouless Phase Transition in an Ultracold Fermi Gas
• Observation of pair condensation in the quasi-2D BEC-BCS crossover
• Two-Dimensional Homogeneous Fermi Gases
• Production of a Fermi gas of atoms in an optical lattice
• Scale invariance and viscosity of a two-dimensional Fermi gas
• Polarons in the radio-frequency spectrum of a quasi-two-dimensional Fermi gas
• Superfluid transition in quasi2D Fermi gases
• Ground-state pressure of quasi-2D Fermi and Bose gases
• Equation of State of Ultracold Fermions in the 2D BEC-BCS Crossover Region
• Thermodynamics of an attractive 2D Fermi gas
• Strongly interacting two-dimensional Fermi gases
• Universal equation of state and pseudogap in the two-dimensional Fermi gas
• Pressure, compressibility, and contact of the two-dimensional attractive Fermi gas
• Anomalous breaking of scale invariance in a two-dimensional Fermi gas
• Quantum anomaly and 2D-3D crossover in strongly interacting Fermi gases
• Phase separation and pair condensation in a spin-imbalanced 2D Fermi gas
• Fermi Gases in the Two-Dimensional to Quasi-Two-Dimensional Crossover
• BCS-BEC crossover in a quasi-two-dimensional Fermi gas