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arXiv · 1812.03875

Observation of atom-number fluctuations in optical lattices via quantum collapse and revival dynamics

Tianwei Zhou·Kaixiang Yang·Zijie Zhu·Xudong Yu·Shifeng Yang·Wei Xiong·Xiaoji Zhou·Xuzong Chen·Chen Li·Jörg Schmiedmayer·Xuguang Yue·Yueyang Zhai
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Abstract

Using the quantum collapse and revival phenomenon of a Bose--Einstein condensate in three-dimensional optical lattices, the atom number statistics on each lattice site are experimentally investigated. We observe an interaction driven time evolution of on-site number fluctuations in a constant lattice potential with the collapse and revival time ratio as the figure of merit. Through a shortcut loading procedure, we prepare a three-dimensional array of coherent states with Poissonian number fluctuations. The following dynamics clearly show the interaction effect on the evolution of the number fluctuations from Poissonian to sub-Poissonian. Our method can be used to create squeezed states which are important in precision measurement.

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Tianwei Zhou, Kaixiang Yang, Zijie Zhu, Xudong Yu, Shifeng Yang, Wei Xiong, Xiaoji Zhou, Xuzong Chen, Chen Li, Jörg Schmiedmayer, Xuguang Yue, Yueyang Zhai. 2018-12-10. Observation of atom-number fluctuations in optical lattices via quantum collapse and revival dynamics. https://doi.org/10.1103/physreva.99.013602

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