Dynamical revival of phase coherence in a many-boson system

Abstract

We study the quantum dynamics of cold Bose atoms in a double well. It is shown that self-trapping, as well as population oscillations are common phenomena associated to nonlinear interactions. For larger $U/t$, multi-particle tunneling is damped and the quantum dynamics is dominated by the single-particle tunneling. The many-body system can be effectively described in a truncated Fock space. It exhibits coherence-decoherence oscillations in the temporal evolution. We predict a novel phenomenon of dynamical revival and collapse of matter wave fields in optical lattices in regimes near the superfluid-Mott insulator phase boundary.

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References in corpus (6)

• Quantum phase transition from a superfluid to a Mott insulator in a gas of ultracold atoms
• Repulsively bound atom pairs in an optical lattice
• Fragmentation of Bose-Einstein Condensates
• Few-boson dynamics in double wells: From single-atom to correlated-pair tunneling
• Coherent control of a self-trapped Bose-Einstein condensate
• Tunneling-induced damping of phase coherence revivals in deep optical lattices

Cited by in corpus (1)

• Disorder effects on the quantum coherence of a many-boson system