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Time crystallinity in open quantum systems
- Source :
- Quantum, Vol 4, p 270 (2020)
- Publication Year :
- 2020
- Publisher :
- Verein zur Förderung des Open Access Publizierens in den Quantenwissenschaften, 2020.
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Abstract
- Time crystals are genuinely non-equilibrium quantum phases of matter that break time-translational symmetry. While in non-equilibrium closed systems time crystals have been experimentally realized, it remains an open question whether or not such a phase survives when systems are coupled to an environment. Although dissipation caused by the coupling to a bath may stabilize time crystals in some regimes, the introduction of incoherent noise may also destroy the time crystalline order. Therefore, the mechanisms that stabilize a time crystal in open and closed systems are not necessarily the same. Here, we propose a way to identify an open system time crystal based on a single object: the Floquet propagator. Armed with such a description we show time-crystalline behavior in an explicitly short-range interacting open system and demonstrate the crucial role of the nature of the decay processes.
Details
- Language :
- English
- ISSN :
- 2521327X
- Volume :
- 4
- Database :
- Directory of Open Access Journals
- Journal :
- Quantum
- Publication Type :
- Academic Journal
- Accession number :
- edsdoj.b97c008321cd4dc583d90ba1e919b928
- Document Type :
- article
- Full Text :
- https://doi.org/10.22331/q-2020-05-25-270