Dynamics and Thermodynamics of the Low-Temperature Strongly Interacting Bose Gas

Nir Navon, Swann Piatecki, Kenneth Günter, Benno Rem, Trong Canh Nguyen, Frédéric Chevy, Werner Krauth, and Christophe Salomon
Phys. Rev. Lett. 107, 135301 – Published 19 September 2011
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Abstract

We measure the zero-temperature equation of state of a homogeneous Bose gas of Li7 atoms by analyzing the in situ density distributions of trapped samples. For increasing repulsive interactions our data show a clear departure from mean-field theory and provide a quantitative test of the many-body corrections first predicted in 1957 by Lee, Huang, and Yang [Phys. Rev. 106, 1135 (1957).]. We further probe the dynamic response of the Bose gas to a varying interaction strength and compare it to simple theoretical models. We deduce a lower bound for the value of the universal constant ξ>0.44(8) that would characterize the universal Bose gas at the unitary limit.

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  • Received 15 March 2011

DOI:https://doi.org/10.1103/PhysRevLett.107.135301

© 2011 American Physical Society

Authors & Affiliations

Nir Navon1,*, Swann Piatecki2,†, Kenneth Günter1, Benno Rem1, Trong Canh Nguyen1, Frédéric Chevy1, Werner Krauth2, and Christophe Salomon1

  • 1Laboratoire Kastler Brossel, CNRS, UPMC, École Normale Supérieure, 24 rue Lhomond, 75005 Paris, France
  • 2Laboratoire de Physique Statistique, École Normale Supérieure, UPMC, Université Paris Diderot, CNRS, 24 rue Lhomond, 75005 Paris, France

  • *navon@ens.fr
  • swann.piatecki@ens.fr

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Issue

Vol. 107, Iss. 13 — 23 September 2011

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