Time crystallinity in open quantum systems
| Autor: | M. Moreno-Cardoner, Anna Sanpera, Andreu Riera-Campeny |
|---|---|
| Jazyk: | angličtina |
| Rok vydání: | 2019 |
| Předmět: |
Physics
Floquet theory Quantum Physics Physics and Astronomy (miscellaneous) FOS: Physical sciences Propagator Quantum phases Dissipation 01 natural sciences Open system (systems theory) Atomic and Molecular Physics and Optics Symmetry (physics) lcsh:QC1-999 010305 fluids & plasmas Coupling (physics) Classical mechanics 0103 physical sciences Quantum Physics (quant-ph) 010306 general physics Quantum lcsh:Physics |
| Zdroj: | Quantum, Vol 4, p 270 (2020) |
| Popis: | 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. |
| Databáze: | OpenAIRE |
| Externí odkaz: |
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