Correlations in non-Hermitian systems and diagram techniques for the steady state
I construct a diagrammatic technique for non-Hermitian fermionic systems which allows addressing correlation effects in the steady state by systematic expansion. Applying this method to exceptional points or rings, I find that nodal objects in non-Hermitian systems are generically displaced in momen...
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| Format: | Article |
| Language: | English |
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American Physical Society
2020-01-01
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| Series: | Physical Review Research |
| Online Access: | http://doi.org/10.1103/PhysRevResearch.2.013078 |