Slow quench dynamics of periodically driven quantum gases

Journal Article · Fri Jul 15 00:00:00 EDT 2011 · Physical Review. A

DOI:https://doi.org/10.1103/PHYSREVA.84.013615· OSTI ID:22058748

Poletti, Dario ^[1]; Kollath, Corinna ^[1]

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1. Departement de Physique Theorique, Universite de Geneve, 24, quai E. Ansermet CH-1211 Geneve 4 (Switzerland)

We study the evolution of bosons in a periodically driven optical lattice during a slow change of the driving amplitude. Both the regime of high-frequency and low-frequency driving are investigated. In the low-frequency regime, resonant absorption of energy is observed. In the high-frequency regime, the dynamics is compared to a system with an effective Hamiltonian in which the atoms are ''dressed'' by the driving field. This ''dressing'' can dramatically change the amplitude and sign of the effective tunneling. A particular focus of this study is the investigation of the time scales necessary for the evolving quantum state to follow almost adiabatically to the ground state of the effective many-body system.

• OSTI ID: 22058748
• Journal Information: Physical Review. A, Vol. 84, Issue 1; Other Information: (c) 2011 American Institute of Physics; Country of input: International Atomic Energy Agency (IAEA); ISSN 1050-2947
• Country of Publication: United States
• Language: English

Related Subjects

71 CLASSICAL AND QUANTUM MECHANICS
GENERAL PHYSICS
BOSONS
GROUND STATES
HAMILTONIANS
MANY-BODY PROBLEM
QUANTUM STATES
QUENCHING
RESONANCE ABSORPTION
TUNNEL EFFECT