Protection of parity-time symmetry in topological many-body systems: Non-Hermitian toric code and fracton models
In the study of PT-symmetric quantum systems with non-Hermitian perturbations, one of the most important questions is whether eigenvalues stay real or whether PT symmetry is spontaneously broken when eigenvalues meet. A particularly interesting set of eigenstates is provided by the degenerate ground...
| Published in: | Physical Review Research |
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| Main Authors: | , |
| Format: | Article |
| Language: | English |
| Published: |
American Physical Society
2020-07-01
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| Online Access: | http://doi.org/10.1103/PhysRevResearch.2.033022 |