Two-body and three-body contacts for three Bosons in the unitary regime: analytic expressions and limiting forms

Victor Colussi (Corresponding author)

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Abstract

The two- and three-body contacts are central to a set of univeral relations between microscopic few-body physics within an ultracold Bose gas and its thermodynamical properties. They may also be defined in trapped few-particle systems, which is the subject of this work. In this work, we focus on the unitary three-body problem in a trap, where interactions are as strong as allowed by quantum mechanics. We derive analytic results for the two- and three-body contacts in this regime and compare them with existing limiting expressions and previous numerical studies.
Original languageEnglish
Article number19
Number of pages14
JournalAtoms
Volume7
Issue number1
DOIs
Publication statusPublished - 5 Feb 2019

Keywords

  • Efimov effect
  • Non-perturbative methods
  • Strongly correlated systems
  • Tan contact
  • Ultracold gases

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