Bose-Einstein condensates in an atom-optomechanical system with effective global nonuniform interaction
| Autor: | Xiang-Fa Zhou, Han Pu, Jia-Ming Cheng, Guang-Can Guo, Zheng-Wei Zhou |
|---|---|
| Rok vydání: | 2021 |
| Předmět: |
Condensed Matter::Quantum Gases
Physics Quantum Physics Phase transition Optical lattice FOS: Physical sciences Physics::Optics Quantum phases 01 natural sciences Symmetry (physics) 010305 fluids & plasmas law.invention Quantum Gases (cond-mat.quant-gas) law Optical cavity 0103 physical sciences Atom Atomic physics Quantum Physics (quant-ph) Condensed Matter - Quantum Gases 010306 general physics Translational symmetry Bose–Einstein condensate |
| Zdroj: | Physical Review A. 103 |
| ISSN: | 2469-9934 2469-9926 |
| DOI: | 10.1103/physreva.103.023328 |
| Popis: | We consider a hybrid atom-optomechanical system consisting of a mechanical membrane inside an optical cavity and an atomic Bose-Einstein condensate outside the cavity. The condensate is confined in an optical lattice potential formed by a traveling laser beam reflected off one cavity mirror. We derive the cavity-mediated effective atom-atom interaction potential, and find that it is non-uniform, site-dependent, and does not decay as the interatomic distance increases. We show that the presence of this effective interaction breaks the Z$_2$ symmetry of the system and gives rise to new quantum phases and phase transitions. When the long-range interaction dominates, the condensate breaks the translation symmetry and turns into a novel self-organized lattice-like state with increasing particle densities for sites farther away from the cavity. We present the phase diagram of the system, and investigate the stabilities of different phases by calculating their respective excitation spectra. The system can serve as a platform to explore various self-organized phenomena induced by the long-range interactions. 15 pages, 7 figures |
| Databáze: | OpenAIRE |
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