Phase diagram of Rydberg atoms in a nonequilibrium optical lattice
Phase diagram of Rydberg atoms in a nonequilibrium optical lattice
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非平衡光学晶格中里德伯原子的相图
DOI：
10.1103/physreva.85.065401
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发表时间：
2012-06
影响因子：
2.9
通讯作者：
Weiping Zhang
中科院分区：
文献类型：
--
作者：
Jing Qian;Guangjiong Dong;Lu Zhou;Weiping Zhang
研究了囚禁在光晶格中的超冷三能级原子的量子非平衡动力学，原子通过双光子激发到达Rydberg态，并伴随着不可忽略的自发辐射.丰富的量子相，包括均匀相，反铁磁相，和振荡相被确定。我们绘制了相图，发现这些相位可以通过调节泵浦光与控制光的强度之比以及双光子失谐量与里德伯相互作用强度之比来控制。当双光子失谐量发生蓝移且蓝移比小于1时，相位间存在双稳态。实际上，该比率控制了Rydberg阻断和Rydberg反阻断效应，因此，该系统中的相变可以被认为是研究这两种效应的可能途径。
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.
DOI：
10.1007/978-94-011-0019-9_28
发表时间：
1995
期刊：
--
影响因子：
--
作者：
B. Muzykantskii;D. Khmelnitskii
通讯作者：
B. Muzykantskii;D. Khmelnitskii