Physics – Condensed Matter – Quantum Gases
Scientific paper
2011-06-13
Phys. Rev. A 84, 033605 (2011)
Physics
Condensed Matter
Quantum Gases
9 pages, 5 figures
Scientific paper
10.1103/PhysRevA.84.033605
We study the dynamics of strongly repulsive Bose gas in tilted or driven bichromatic optical lattices. Using the Bose-Fermi mapping and exact numerical method, we calculate the reduced single-particle density matrices, and study the dynamics of density profile, momentum distribution and condensate fraction. We show the oscillating and breathing mode of dynamics, and depletion of condensate for short time dynamics. For long time dynamics, we clearly show the reconstruction of system at integer multiples of Bloch-Zener time. We also show how to achieve clear Bloch oscillation and Landau-Zener tunnelling for many-particle systems.
Cai Xiaoming
Chen Shu
Wang Yupeng
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