Two- and three-body contacts in the unitary Bose gas
American Association for the Advancement of Science
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Fletcher, R., Lopes, R., Man, J., Navon, N., Smith, R., Zwierlein, M., & Hadzibabic, Z. (2017). Two- and three-body contacts in the unitary Bose gas. Science, 355 (6323), 377-380. https://doi.org/10.1126/science.aai8195
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.
Is supplemented by: https://doi.org/10.17863/CAM.7184
This work was supported by EPSRC [Grant No. EP/N011759/1], ERC (QBox), ARO and AFOSR. N.N. ac- knowledges support from Trinity College, Cambridge, R.P.S. from the Royal Society and R.L. from the E.U. Marie-Curie program [Grant No. MSCA-IF-2015 704832].
ECH2020 EUROPEAN RESEARCH COUNCIL (ERC) (682285)
European Office of Aerospace Research and Development (EOARD) (W911NF-15-1-0444)
European Commission Horizon 2020 (H2020) Marie Sk?odowska-Curie actions (704832)
Royal Society (uf110236)
Royal Society (RG120365)
External DOI: https://doi.org/10.1126/science.aai8195
This record's URL: https://www.repository.cam.ac.uk/handle/1810/263088