References
SHOWING 1-4 OF 4 REFERENCES
Quantum time crystals.
- PhysicsPhysical review letters
- 2012
Some subtleties and apparent difficulties associated with the notion of spontaneous breaking of time-translation symmetry in quantum mechanics are identified and resolved. A model exhibiting that…
Classical time crystals.
- PhysicsPhysical review letters
- 2012
This work considers the possibility that classical dynamical systems display motion in their lowest-energy state, forming a time analogue of crystalline spatial order, and exhibits models of that kind, including a model with traveling density waves.
Space-time crystals of trapped ions.
- Physics, Materials SciencePhysical review letters
- 2012
The proposed space-time crystals of trapped ions provide a new dimension for exploring many-body physics and emerging properties of matter and are robust for direct experimental observation.
Impossibility of spontaneously rotating time crystals: a no-go theorem.
- PhysicsPhysical review letters
- 2013
A "no-go theorem" is proved, rigorously ruling out the possibility of spontaneous ground-state rotation for a broad class of systems.