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Interaction-induced decoherence of atomic BLOCH oscillations
Andreas Buchleitner1, Andrey R Kolovsky
1Max-Planck-Institut für Physik komplexer Systeme, D-01187 Dresden, Germany.
Physical Review Letters
|February 3, 2004
Summary
Quantum chaos in the Bose-Hubbard model leads to irreversible decay in cold atom Bloch oscillations. This finding provides a Hamiltonian model for interaction-induced decoherence in optical lattices.
Area of Science:
- Quantum physics
- Atomic physics
- Condensed matter physics
Background:
- The Bose-Hubbard model describes interacting cold atoms in optical lattices.
- Bloch oscillations are fundamental quantum phenomena in such systems.
- Understanding decoherence is crucial for quantum technologies.
Purpose of the Study:
- To investigate the impact of a static field on the Bose-Hubbard model's energy spectrum.
- To explore the connection between spectral statistics and the dynamics of cold atoms.
- To establish a theoretical model for interaction-induced decoherence.
Main Methods:
- Analysis of the energy spectrum of the Bose-Hubbard model with a static field.
- Identification of Wigner-Dyson level statistics.
- Theoretical modeling of cold, interacting atoms in an optical lattice.
Main Results:
- The amended Bose-Hubbard model exhibits Wigner-Dyson level statistics.
- This spectral signature indicates quantum chaos.
- Quantum chaos induces irreversible decay of Bloch oscillations.
Conclusions:
- Wigner-Dyson statistics in this model are a signature of quantum chaos.
- Quantum chaos drives interaction-induced decoherence in cold atom systems.
- The study provides a Hamiltonian model for decoherence in optical lattices.