报告题目: |
Mapping the phase diagram of spinor condensates via adiabatic quantum phase transitions |
报告人: |
Yingmei Liu |
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Department of Physics, Oklahoma State University
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报告时间: |
2014-06-18 15:15 |
报告地点: |
Conference Hall 322, Science Building, Tsinghua University |
主办单位: |
高等研究院 |
简介: |
(2:45~3:15pm, Tea, Coffee, and Cookie)
We experimentally study two quantum phase transitions in a sodium spinor condensate
immersed in a microwave dressing field. In contrast to magnetic fields, microwave
dressing fields can induce both negative and positive values of the quadratic Zeeman
energy. We demonstrate that many previously unexplored regions in the phase diagram
of spinor condensates can be investigated by adiabatically tuning a microwave field
across one of the two quantum phase transitions. This method overcomes two major
experimental challenges associated with some widely used methods, and is applicable
to other atomic species. Agreements between our data and the mean-field theory for
spinor Bose gases are also discussed. |
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