Probing the Bose-Glass--Superfluid Transition using Quantum Quenches of Disorder
Quantum Gases
2016-07-20 v1 Disordered Systems and Neural Networks
Abstract
We probe the transition between superfluid and Bose glass phases using quantum quenches of disorder in an ultracold atomic lattice gas that realizes the disordered Bose-Hubbard model. Measurements of excitations generated by the quench exhibit threshold behavior in the disorder strength indicative of a phase transition. Ab-initio quantum Monte Carlo simulations confirm that the appearance of excitations coincides with the equilibrium superfluid--Bose-glass phase boundary at different lattice potential depths. By varying the quench time, we demonstrate the disappearance of an adiabatic timescale compared with microscopic parameters in the BG regime.
Keywords
Cite
@article{arxiv.1502.02333,
title = {Probing the Bose-Glass--Superfluid Transition using Quantum Quenches of Disorder},
author = {C. Meldgin and U. Ray and P. Russ and D. Ceperley and B. DeMarco},
journal= {arXiv preprint arXiv:1502.02333},
year = {2016}
}
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