Engineering many-body quantum dynamics by disorder

Year: 2008

Authors: Buonsante P., Wimberger S.

Autors Affiliation: CNISM – Dipartimento di Fisica, Politecnico di Torino, Corso Duca degli Abruzzi 24, 10129 Torino, Italy; Institut für Theoretische Physik, Universität Heidelberg, Philosophenweg 19, 69120 Heidelberg, Germany

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.

Journal/Review: PHYSICAL REVIEW A

Volume: 77 (4)      Pages from: 041606  to: 041606

More Information: Rapid Communication
KeyWords: Transport; bosons; lattice; quantum; disorder
DOI: 10.1103/PhysRevA.77.041606

Citations: 10
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