Tunable multistability and nonuniform phases in a dimerized two-dimensional Rydberg lattice

doi:10.1088/1674-1056/ab5d06

中国物理B ›› 2020, Vol. 29 ›› Issue (1): 13204-013204.doi: 10.1088/1674-1056/ab5d06

• SPECIAL TOPIC—Recent advances in thermoelectric materials and devices • 上一篇下一篇

Tunable multistability and nonuniform phases in a dimerized two-dimensional Rydberg lattice

Han-Xiao Zhang(张焓笑), Chu-Hui Fan(范楚辉), Cui-Li Cui(崔淬砺), Jin-Hui Wu(吴金辉)

1 Center for Quantum Sciences, Northeast Normal University, Changchun 130117, China;
2 College of Physics, Jilin University, Changchun 130012, China

收稿日期:2019-10-31 修回日期:2019-11-22 出版日期:2020-01-05 发布日期:2020-01-05
通讯作者: Cui-Li Cui, Jin-Hui Wu E-mail:cuicuili@jlu.edu.cn;jhwu@nenu.edu.cn
基金资助:
Project supported by the National Natural Science Foundation of China (Grant Nos. 11534002 and 11674049).

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

Received:2019-10-31 Revised:2019-11-22 Online:2020-01-05 Published:2020-01-05
Contact: Cui-Li Cui, Jin-Hui Wu E-mail:cuicuili@jlu.edu.cn;jhwu@nenu.edu.cn
Supported by:
Project supported by the National Natural Science Foundation of China (Grant Nos. 11534002 and 11674049).

摘要/Abstract

摘要： 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.

关键词: Rydberg atoms, dimerized system, fixed point, nonuniform phase

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.

Key words: Rydberg atoms, dimerized system, fixed point, nonuniform phase

中图分类号: (Rydberg states)

32.80.Ee

05.70.Fh (Phase transitions: general studies) 42.50.Nn (Quantum optical phenomena in absorbing, amplifying, dispersive and conducting media; cooperative phenomena in quantum optical systems)

张焓笑, 范楚辉, 崔淬砺, 吴金辉. Tunable multistability and nonuniform phases in a dimerized two-dimensional Rydberg lattice[J]. 中国物理B, 2020, 29(1): 13204-013204.

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[J]. Chin. Phys. B, 2020, 29(1): 13204-013204.

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Tunable multistability and nonuniform phases in a dimerized two-dimensional Rydberg lattice

Tunable multistability and nonuniform phases in a dimerized two-dimensional Rydberg lattice

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