Efimov physics in quenched unitary bose gases

J.P. D'Incao, J. Wang, V.E. Colussi

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Abstract

We study the impact of three-body physics in quenched unitary Bose gases, focusing on the role of the Efimov effect. Using a local density model, we solve the three-body problem and determine three-body decay rates at unitary, finding density-dependent, log-periodic Efimov oscillations, violating the expected continuous scale-invariance in the system. We find that the breakdown of continuous scale-invariance, due to Efimov physics, manifests also in the earliest stages of evolution after the interaction quench to unitarity, where we find the growth of a substantial population of Efimov states for densities in which the interparticle distance is comparable to the size of an Efimov state. This agrees with the early-time dynamical growth of three-body correlations at unitarity [Colussi {\em et al}., Phys. Rev. Lett. 120, 100401 (2018)]. By varying the sweep rate away from unitarity, we also find a departure from the usual Landau-Zener analysis for state transfer when the system is allowed to evolve at unitarity and develop correlations.
Original languageEnglish
Number of pages12
JournalarXiv.org, e-Print Archive, Physics
Issue number1804.05912v3
Publication statusPublished - 16 Apr 2018

Bibliographical note

5 pages, 4 figures (supplementary material: 5 pages, 4 figures)

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