Dynamical phase transitions and instabilities in open atomic many-body systems

Diehl, Sebastian and Tomadin, Andrea and Micheli, Andrea and Fazio, Rosario and Zoller, Peter (2010) Dynamical phase transitions and instabilities in open atomic many-body systems. Physical review letters, 105 (1). ISSN 0031-9007

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Abstract

We discuss an open driven-dissipative many-body system, in which the competition of unitary Hamiltonian and dissipative Liouvillian dynamics leads to a nonequilibrium phase transition. It shares features of a quantum phase transition in that it is interaction driven, and of a classical phase transition, in that the ordered phase is continuously connected to a thermal state. We characterize the phase diagram and the critical behavior at the phase transition approached as a function of time. We find a novel fluctuation induced dynamical instability, which occurs at long wavelength as a consequence of a subtle dissipative renormalization effect on the speed of sound.

Item Type: Journal Article
Journal or Publication Title: Physical review letters
Uncontrolled Keywords: /dk/atira/pure/subjectarea/asjc/3100
Subjects:
Departments: Faculty of Science and Technology > Physics
ID Code: 129032
Deposited By: ep_importer_pure
Deposited On: 22 Nov 2018 16:40
Refereed?: Yes
Published?: Published
Last Modified: 11 Feb 2020 04:47
URI: https://eprints.lancs.ac.uk/id/eprint/129032

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