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arXiv · 1804.05912

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.

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J. P. D'Incao, J. Wang, V. E. Colussi. 2018-05-22. Efimov Physics in Quenched Unitary Bose Gases. https://doi.org/10.1103/physrevlett.121.023401

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