期刊
SCIENCE
卷 366, 期 6472, 页码 1496-+出版社
AMER ASSOC ADVANCEMENT SCIENCE
DOI: 10.1126/science.aaw4465
关键词
-
资金
- SNF [182650, 175329]
- EU Horizon 2020 [ERC Advanced Grant TransQ] [742579]
- SBFI (QUIC) [15.0019]
- SNF [NCCR QSIT]
Dissipative and unitary processes define the evolution of a many-body system. Their interplay gives rise to dynamical phase transitions and can lead to instabilities. In this study, we observe a nonstationary state of chiral nature in a synthetic many-body system with independently controllable unitary and dissipative couplings. Our experiment is based on a spinor Bose gas interacting with an optical resonator. Orthogonal quadratures of the resonator field coherently couple the Bose-Einstein condensate to two different atomic spatial modes, whereas the dispersive effect of the resonator losses mediates a dissipative coupling between these modes. In a regime of dominant dissipative coupling, we observe the chiral evolution and relate it to a positional instability.
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