Ground-State Properties of Unitary Bosons: From Clusters to Matter

J. Carlson, S. Gandolfi, U. van Kolck, and S. A. Vitiello
Phys. Rev. Lett. 119, 223002 – Published 29 November 2017
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Abstract

The properties of cold Bose gases at unitarity have been extensively investigated in the last few years both theoretically and experimentally. In this Letter we use a family of interactions tuned to two-body unitarity and very weak three-body binding to demonstrate the universal properties of both clusters and matter. We determine the universal properties of finite clusters up to 60 particles and, for the first time, explicitly demonstrate the saturation of energy and density with particle number and compare with bulk properties. At saturation in the bulk we determine the energy, density, two- and three-body contacts, and the condensate fraction. We find that uniform matter is more bound than three-body clusters by nearly 2 orders of magnitude, the two-body contact is very large in absolute terms, and yet the condensate fraction is also very large, greater than 90%. Equilibrium properties of these systems may be experimentally accessible through rapid quenching of weakly interacting boson superfluids.

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  • Received 26 July 2017

DOI:https://doi.org/10.1103/PhysRevLett.119.223002

© 2017 American Physical Society

Physics Subject Headings (PhySH)

Atomic, Molecular & OpticalCondensed Matter, Materials & Applied Physics

Authors & Affiliations

J. Carlson1,*, S. Gandolfi1,†, U. van Kolck2,3,‡, and S. A. Vitiello4,§

  • 1Theoretical Division, Los Alamos National Laboratory, Los Alamos, New Mexico 87545, USA
  • 2Institut de Physique Nucléaire, CNRS/IN2P3, Université Paris-Sud, Université Paris-Saclay, 91406 Orsay, France
  • 3Department of Physics, University of Arizona, Tucson, Arizona 85721, USA
  • 4Instituto de Física Gleb Wataghin, Universidade Estadual de Campinas, 13083-859 Campinas SP, Brazil

  • *carlson@lanl.gov
  • stefano@lanl.gov
  • vankolck@ipno.in2p3.fr
  • §vitiello@ifi.unicamp.br

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Issue

Vol. 119, Iss. 22 — 1 December 2017

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