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Matter wave interference of dilute Bose gases in the critical regime |
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| Institution: | 1.Wilczek Quantum Center, Zhejiang University of Technology, Hangzhou 310023, China;2.Department of Applied Physics, Zhejiang University of Technology, Hangzhou 310023, China;3.International Center for Quantum Materials, School of Physics, Peking University, Beijing 100871, China;4.Collaborative Innovation Center of Quantum Matter, Beijing 100871, China |
| Abstract: | Ultra-cold atomic gases provide a new chance to study the universal critical behavior of phase transition. We study theoretically the matter wave interference for ultra-cold Bose gases in the critical regime. We demonstrate that the interference in the momentum distribution can be used to extract the correlation in the Bose gas. A simple relation between the interference visibility and the correlation length is found and used to interpret the pioneering experiment about the critical behavior of dilute Bose gases Science 315 1556(2007)]. Our theory paves the way to experimentally study various types of ultra-cold atomic gases with the means of matter wave interference. |
| Keywords: | phase transition critical correlation matter wave interference ultra-cold atomic gases |
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