Tunable multistability and nonuniform phases in a dimerized two-dimensional Rydberg lattice
| Autor: | Cui-Li Cui, Jin-Hui Wu, Han-Xiao Zhang, Chu-Hui Fan |
|---|---|
| Rok vydání: | 2020 |
| Předmět: |
Physics
Bistability General Physics and Astronomy 02 engineering and technology Fixed point 021001 nanoscience & nanotechnology 01 natural sciences Square lattice Molecular physics Quantitative Biology::Cell Behavior symbols.namesake 0103 physical sciences Rydberg atom Rydberg formula symbols Physics::Atomic Physics 010306 general physics 0210 nano-technology Multistability Excitation Phase diagram |
| Zdroj: | Chinese Physics B. 29:013204 |
| ISSN: | 1674-1056 |
| DOI: | 10.1088/1674-1056/ab5d06 |
| Popis: | 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. |
| Databáze: | OpenAIRE |
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