Journal
PHYSICAL REVIEW LETTERS
Volume 121, Issue 3, Pages -Publisher
AMER PHYSICAL SOC
DOI: 10.1103/PhysRevLett.121.035301
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Funding
- Progetti Interni-Scuola Normale Superiore
- European Union through the project QUIC [641122]
- NRF (National Research Foundation) Singapore Ministry of Education [CPR-QSYNC 692]
- EPSRC program TOPNES [EP/I031014/1]
- ERC [758329]
- EPSRC [EP/I031014/1] Funding Source: UKRI
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In this work we introduce boundary time crystals. Here continuous time-translation symmetry breaking occurs only in a macroscopic fraction of a many-body quantum system. After introducing their definition and properties, we analyze in detail a solvable model where an accurate scaling analysis can be performed. The existence of the boundary time crystals is intimately connected to the emergence of a time-periodic steady state in the thermodynamic limit of a many-body open quantum system. We also discuss connections to quantum synchronization.
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