期刊
PHYSICAL REVIEW A
卷 85, 期 6, 页码 -出版社
AMER PHYSICAL SOC
DOI: 10.1103/PhysRevA.85.065401
关键词
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资金
- National Basic Research Program of China (973 Program) [2011CB921604, 2011CB921602]
- NSFC [11104076, 11004057, 11034002, 10974057, 10874045]
- Specialized Research Fund for the Doctoral Program of Higher Education [20110076120004]
- Shanghai Municipal Education Commission
- Shanghai Education Development Foundation [10CG24]
We study the quantum nonequilibrium dynamics of ultracold three-level atoms trapped in an optical lattice, which are excited to their Rydberg states via a two-photon excitation with non-negligible spontaneous emission. Rich quantum phases, including the uniform phase, the antiferromagnetic phase, and the oscillatory phase are identified. We map out the phase diagram and find these phases can be controlled by adjusting the ratio of intensity of the pump light to the control light and that of two-photon detuning to the Rydberg interaction strength. When the two-photon detuning is blueshifted and the latter ratio is less than 1, bistability exists among the phases. Actually, this ratio controls the Rydberg-blockade and Rydberg-antiblockade effects, thus, the phase transition in this system can be considered as a possible approach to study both effects.
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