A return to observability near exceptional points in a schematic PT-symmetric model

Result code in IS VaVaI
<a href="https://www.isvavai.cz/riv?ss=detail&h=RIV%2F61389005%3A_____%2F07%3A00083903" target="_blank" >RIV/61389005:_____/07:00083903 - isvavai.cz</a>
Result on the web
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DOI - Digital Object Identifier
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Result language
angličtina
Original language name
A return to observability near exceptional points in a schematic PT-symmetric model
Original language 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 partial derivative D) (= Kato's "exceptional points", EPs). In a solvable example we detect an enlargement of E) 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. (c) 2007 Elsevier B.V. All rights reserved.
Czech name
Návrat k pozorovatenosti v okolí vyjímečných bodů ve schematickém PT symetrickém modelu
Czech description
Body komplexifikace energií (nesoucí Katoovo jméno) mají tu vlastnost, že uvolnění nového stupně volnosti vede k jejich odsunutí. Mechanismus tohoto typu je ilustrován kvantitativněna jednoduchém modelu.

Type
J<sub>x</sub> - Unclassified - Peer-reviewed scientific article (Jimp, Jsc and Jost)
CEP classification
BE - Theoretical physics
OECD FORD branch
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Project
Result was created during the realization of more than one project. More information in the Projects tab.
Continuities
Z - Vyzkumny zamer (s odkazem do CEZ)

Publication year
2007
Confidentiality
S - Úplné a pravdivé údaje o projektu nepodléhají ochraně podle zvláštních právních předpisů

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