A return to observability near exceptional points in a schematic PT-symmetric model
| dc.creator | Znojil, Miloslav | |
| dc.date | 2007-01-30 | |
| dc.date.accessioned | 2026-07-07T07:52:24Z | |
| dc.date.available | 2026-07-07T07:52:24Z | |
| dc.description | Many indefinite-metric (often called pseudo-Hermitian or PT-symmetric) quantum models H prove "physical" (i.e., Hermitian with respect to an innovated, ad hoc scalar product) inside a characteristic domain of parameters D. This means that the energies get complex (= unobservable) beyond the boundary (= Kato's "exceptional points", EPs). In a solvable example we detect an enlargement of D caused by the emergence of a new degree of freedom. We conjecture that such a beneficial mechanism of a return to the real spectrum near EPs may be generic and largely model-independent. | |
| dc.description | 14 pp., 1 fig | |
| dc.identifier | https://arxiv.org/abs/quant-ph/0701232 | |
| dc.identifier | http://arxiv.org/abs/quant-ph/0701232 | |
| dc.identifier | Phys. Lett. B 647 (2007) 225 - 230 | |
| dc.identifier | doi:10.1016/j.physletb.2007.01.046 | |
| dc.identifier.uri | http://salesiana.dossiersoluciones.com/handle/123456789/125864 | |
| dc.subject | Quantum Physics | |
| dc.title | A return to observability near exceptional points in a schematic PT-symmetric model | |
| dc.type | text |