期刊
NEW JOURNAL OF PHYSICS
卷 20, 期 -, 页码 -出版社
IOP PUBLISHING LTD
DOI: 10.1088/1367-2630/aabc3a
关键词
many body systems; time dependent Schrodinger equation; Bose-Einstein condensates; light-matter interaction; multi-component systems; MCTDHB
资金
- Austrian Science Foundation (FWF) [F65, F40, F41, P 31140-N32]
- Wiener Wissenschafts-und TechnologieFonds (WWTF) [MA16-066]
- FAPESP
- Wolfgang-Pauli-Institut
- HLRS
- HPC
- Swiss National Science Foundation
We consider laser-pumped one-dimensional two-component bosons in a parabolic trap embedded in a high-finesse optical cavity. Above a threshold pump power, the photons that populate the cavity modify the effective atom trap and mediate a coupling between the two components of the Bose-Einstein condensate. We calculate the ground state of the laser-pumped system and find different stages of self-organization depending on the power of the laser. The modified potential and the laser-mediated coupling between the atomic components give rise to rich many-body physics: an increase of the pump power triggers a self-organization of the atoms while an even larger pump power causes correlations between the self-organized atoms-the BEC becomes fragmented and the reduced density matrix acquires multiple macroscopic eigenvalues. In this fragmented superradiant state, the atoms can no longer be described as two-level systems and the mapping of the system to the Dicke model breaks down.
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