相干原子de Broglie波相互作用

The experimental realization of the Bose-Einstein condensation(BEC) of atomic gases has opened the door to research field of the interaction of coherent matter waves. The coherence of atomic matter wave and its evolution in the atomic guidance was investigated in our project, and the Van Citter-Zernike theorem for atoms was derived which is the basis of description of atomic coherence propagation. BEC is the better system for studying coherent matter waves. In the project we studied the collective excitation of ring BEC in W-type potential trap with rotation symmetry. It was also shown that the ground state of a 2-D rotating BEC system is a fragmented condensate state. After intrinsic spontaneous symmetry breaking the fragmented state decay to a single state and vortices are formed. This result is not obtained from mean-field-approximation theory. In the project we also studied adiabatic population transfer in BEC and influences of interaction between atoms in BEC on the window of electromagnetically induced transparency.

原子气体BE.C和.原子激射器的实验实现.，拉开了相干原子物质波（德布罗意波〕的研究序幕。本项目立项讨论相干原子.物质波相互作用。我们将研究原子相干性的.理论描述，.相稍?物质波与相干光波的相互作.用，相干原子物质波之间的相互作用.，探索其中可能存在的受激过程。本项目的研究将丰富量子和统计.物理学，并将为相干物质波的技术应用奠ɑ?.