Two- and three-body contacts in the unitary Bose gas

Author(s)
Fletcher, Richard J; Lopes, Raphael; Man, Jay; Navon, Nir; Smith, Robert P; ... Show more
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Abstract
Copyright © 2017, American Association for the Advancement of Science. In many-body systems governed by pairwise contact interactions, a wide range of observables is linked by a single parameter, the two-body contact, which quantifies two-particle correlations. This profound insight has transformed our understanding of strongly interacting Fermi gases. Using Ramsey interferometry, we studied coherent evolution of the resonantly interacting Bose gas, and we show here that it cannot be explained by only pairwise correlations. Our experiments reveal the crucial role of three-body correlations arising from Efimov physics and provide a direct measurement of the associated three-body contact.
Date issued
2017
URI
https://hdl.handle.net/1721.1/133901
Department
Massachusetts Institute of Technology. Department of Physics; MIT-Harvard Center for Ultracold Atoms; Massachusetts Institute of Technology. Research Laboratory of Electronics
Journal
Science
Publisher
American Association for the Advancement of Science (AAAS)
Citation
Fletcher, Richard J., et al. "Quantum Gases Two- and Three-Body Contacts in the Unitary Bose Gas." Science 355 6323 (2017): 377-+.
Version: Author's final manuscript
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