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Tunable multistability and nonuniform phases in a dimerized two-dimensional Rydberg lattice |
| Han-Xiao Zhang(张焓笑)1, Chu-Hui Fan(范楚辉)1, Cui-Li Cui(崔淬砺)2, Jin-Hui Wu(吴金辉)1 |
1 Center for Quantum Sciences, Northeast Normal University, Changchun 130117, China;
2 College of Physics, Jilin University, Changchun 130012, China |
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Abstract We study the multistability of fixed points for a dimerized system of Rydberg atoms driven by two laser fields and trapped in a two-dimensional (2D) square lattice. For identical driving fields, the fixed points of this system exhibit stable uniform, unstable uniform, stable nonuniform, or oscillating nonuniform phases in the presence of a bistable region. For different driving fields, however, all (stable, unstable, or oscillating) phases become nonuniform instead, which then results in two islets isolated from the mainland of Rydberg excitation. We also show that a tristable region may stretch out from the (nonuniform) bistable region near the islets, indicating that a richer phase diagram can be attained by tuning the Rabi frequencies and/or detunings of the driving fields. Last but not least, the fixed points can adiabatically evolve from the islets to the mainland but can not inversely evolve from the mainland to the islets.
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Received: 31 October 2019
Revised: 22 November 2019
Accepted manuscript online:
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PACS:
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32.80.Ee
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(Rydberg states)
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05.70.Fh
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(Phase transitions: general studies)
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42.50.Nn
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(Quantum optical phenomena in absorbing, amplifying, dispersive and conducting media; cooperative phenomena in quantum optical systems)
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| Fund: Project supported by the National Natural Science Foundation of China (Grant Nos. 11534002 and 11674049). |
Corresponding Authors:
Cui-Li Cui, Jin-Hui Wu
E-mail: cuicuili@jlu.edu.cn;jhwu@nenu.edu.cn
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Cite this article:
Han-Xiao Zhang(张焓笑), Chu-Hui Fan(范楚辉), Cui-Li Cui(崔淬砺), Jin-Hui Wu(吴金辉) Tunable multistability and nonuniform phases in a dimerized two-dimensional Rydberg lattice 2020 Chin. Phys. B 29 013204
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