Graph-theoretical approach to the eigenvalue spectrum of perturbed higher-order exceptional points
Exceptional points are special degeneracy points in parameter space that can arise in (effective) non-Hermitian Hamiltonians describing open quantum and wave systems. At an nth-order exceptional point, n eigenvalues and the corresponding eigenvectors simultaneously coalesce. These coalescing eigenva...
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| Main Authors: | , , , |
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| Format: | Article |
| Language: | English |
| Published: |
American Physical Society
2025-05-01
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| Series: | Physical Review Research |
| Online Access: | http://doi.org/10.1103/PhysRevResearch.7.023132 |
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