Dnymics of Bose-Einstein condensates in optical lattices

该项目涉及冷玻色气体，其中弱耦合的条件，有效的单粒子描述不再有效。这适用于深光学晶格中的稀释气体以及弱晶格或准均匀情况，其中有效散射长度与平均粒子间距相同。我们的目标是绘制出这些气体可能的相位及其实验特征。我们特别想确定超流体和绝缘晶体构型在一维、二维或三维气体中的定量边界。

The project deals with cold Bose gases, in which the conditions for a weak coupling, effective single-particel description are no longer valid. This applies to dilute gases in deep optical lattices as well as to weak lattice or quasihomogeneous situations, where the effective scattering length is of the same order than the average interparticle spacing. It is our aim, to map out the possible phases of such gases and their experimental signatures. In particular we want to determine the quantitative boundaries between superfluid and insulating, crystalline configurations in one-, two- or three-dimensional gases.