Metastability of Bose and Fermi gases on the upper branch

André LeClair, Itzhak Roditi, and Joshua Squires
Phys. Rev. A 94, 063608 – Published 8 December 2016

Abstract

We study three-dimensional Bose and Fermi gases in the upper branch, a phase defined by the absence of bound states in the repulsive interaction regime, within an approximation that considers only two-body interactions. Employing a formalism based on the S matrix, we derive useful analytic expressions that hold on the upper branch in the weak coupling limit. We determine upper branch phase diagrams for both bosons and fermions with techniques valid for arbitrary positive scattering length.

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  • Received 20 April 2016

DOI:https://doi.org/10.1103/PhysRevA.94.063608

©2016 American Physical Society

Physics Subject Headings (PhySH)

Atomic, Molecular & Optical

Authors & Affiliations

André LeClair1, Itzhak Roditi2, and Joshua Squires1

  • 1Department of Physics, Cornell University, Ithaca, New York 14853, USA
  • 2Centro Brasileiro de Pesquisas Físicas, Rua Dr. Xavier Sigaud 150, 22290-180 Rio de Janeiro, Rio de Janeiro, Brazil

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Issue

Vol. 94, Iss. 6 — December 2016

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