Contact and Momentum Distribution of the Unitary Fermi Gas

R. Rossi, T. Ohgoe, E. Kozik, N. Prokof’ev, B. Svistunov, K. Van Houcke, and F. Werner
Phys. Rev. Lett. 121, 130406 – Published 27 September 2018
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Abstract

A key quantity in strongly interacting resonant Fermi gases is the contact C, which characterizes numerous properties such as the momentum distribution at large momenta or the pair correlation function at short distances. The temperature dependence of C was measured at unitarity, where existing theoretical predictions differ substantially even at the qualitative level. We report accurate data for the contact and the momentum distribution of the unitary gas in the normal phase, obtained by bold diagrammatic Monte Carlo and Borel resummation. Our results agree with experimental data within error bars and provide crucial benchmarks for the development of advanced theoretical treatments and precision measurements.

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  • Received 8 June 2018

DOI:https://doi.org/10.1103/PhysRevLett.121.130406

© 2018 American Physical Society

Physics Subject Headings (PhySH)

  1. Research Areas
  1. Physical Systems
Atomic, Molecular & Optical

Authors & Affiliations

R. Rossi1,*, T. Ohgoe2, E. Kozik3, N. Prokof’ev4,5, B. Svistunov4,5,6, K. Van Houcke1, and F. Werner7

  • 1Laboratoire de Physique Statistique, Ecole Normale Supérieure, Université PSL, Sorbonne Université, Université Paris Diderot, CNRS, 75005 Paris, France
  • 2Department of Applied Physics, University of Tokyo, 7-3-1 Hongo, Bunkyo-ku, Tokyo 113-8656, Japan
  • 3Physics Department, King’s College, London WC2R 2LS, United Kingdom
  • 4Department of Physics, University of Massachusetts, Amherst, Massachusetts 01003, USA
  • 5National Research Center “Kurchatov Institute”, 123182 Moscow, Russia
  • 6Wilczek Quantum Center, School of Physics and Astronomy and T. D. Lee Institute, Shanghai Jiao Tong University, Shanghai 200240, China
  • 7Laboratoire Kastler Brossel, Ecole Normale Supérieure, Université PSL, CNRS, Sorbonne Université, Collège de France, 75005 Paris, France

  • *Present address: Center for Computational Quantum Physics, The Flatiron Institute, New York, USA.

See Also

Resummation of Diagrammatic Series with Zero Convergence Radius for Strongly Correlated Fermions

R. Rossi, T. Ohgoe, K. Van Houcke, and F. Werner
Phys. Rev. Lett. 121, 130405 (2018)

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Issue

Vol. 121, Iss. 13 — 28 September 2018

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