Yinyin Qian, Ming Gong, Chuanwei Zhang
Ultra-cold atoms in optical lattices provide an ideal platform for exploring
many-body physics of a large system arising from the coupling among a series of
small identical systems whose few-body dynamics are exactly solvable. Using
Landau-Zener (LZ) transition of bosonic atoms in double well optical lattices
as an experimentally realizable model, we investigate such few to many body
route by exploring the relation and difference between the small few-body (in
one double well) and the large many-body (in double well lattice)
non-equilibrium dynamics of cold atoms in optical lattices. We find the
many-body coupling between double wells greatly enhances the LZ transition
probability, while keeping the main features of the few-body dynamics. Various
experimental signatures of the many-body LZ transition, including atom density,
momentum distribution, and density-density correlation, are obtained.
View original:
http://arxiv.org/abs/1110.1653
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