Spontaneous symmetry breaking induced by quantum monitoring
arXiv:1808.08343 · doi:10.1103/PhysRevLett.123.090403
Abstract
Spontaneous symmetry breaking (SSB) is responsible for structure formation in scenarios ranging from condensed matter to cosmology. SSB is broadly understood in terms of perturbations to the Hamiltonian governing the dynamics or to the state of the system. We study SSB due to quantum monitoring of a system via continuous quantum measurements. The acquisition of information during the measurement process induces a measurement back-action that seeds SSB. In this setting, by monitoring different observables, an observer can tailor the topology of the vacuum manifold, the pattern of symmetry breaking and the nature of the resulting domains and topological defects.
Accepted to PRL. Includes new simulations illustrating monitored symmetry breaking on a slow quench
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- Feedback Induced Magnetic Phases in Binary Bose-Einstein Condensates
- Thermalization processes induced by quantum monitoring in multi-level systems
- Experimental observation of spontaneous symmetry breaking in a quantum phase transition
- A tensor network approach to sensing quantum light-matter interactions
- Energy fluctuation relations and repeated quantum measurements
- Observation of partial and infinite-temperature thermalization induced by repeated measurements on a quantum hardware
- Engineering Hierarchical Symmetries
- Measurement resolution enhanced coherence for lattice fermions