Dissipation Induced Structural Instability and Chiral Dynamics in a Quantum Gas
Abstract
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. We discovered a non-stationary 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 map it to a positional instability.
Cite
@article{arxiv.1901.05974,
title = {Dissipation Induced Structural Instability and Chiral Dynamics in a Quantum Gas},
author = {Nishant Dogra and Manuele Landini and Katrin Kroeger and Lorenz Hruby and Tobias Donner and Tilman Esslinger},
journal= {arXiv preprint arXiv:1901.05974},
year = {2020}
}
Comments
13 pages including supplementary information