Engineering many-body quantum dynamics by disorder
arXiv:0710.1853 · doi:10.1103/PhysRevA.77.041606
Abstract
Going beyond the currently investigated regimes in experiments on quantum transport of ultracold atoms in disordered potentials, we predict a crossover between regular and quantum-chaotic dynamics when varying the strength of disorder. Our spectral approach is based on the Bose-Hubbard model describing interacting atoms in deep random potentials. The predicted crossover from localized to diffusive dynamics depends on the simultaneous presence of interactions and disorder, and can be verified in the laboratory by monitoring the evolution of typical experimental initial states.
4 pages, 4 figures (improved version), to be published in PRA
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- Spectral analysis of two-dimensional Bose-Hubbard models
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- Detection of avoided crossings by fidelity
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- Simulating and detecting artificial magnetic fields in trapped atoms
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- Emergent Thermalization Thresholds in Unitary Dynamics of Inhomogeneously Disordered Quantum Systems