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Solvability and {\cal PT} -symmetry in a double-well model with point interactions

Miloslav Znojil and Vít Jakubský

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The concept of point interactions offers one of the most suitable guides towards a quantitative analysis of properties of certain specific non-Hermitian (so-called {\cal PT} -symmetric) quantum-mechanical systems. This is illustrated with a double-well model, the easy solvability of which is shown to lead to a clear picture of the mechanisms of the unavoided level crossing and of the spontaneous {\cal PT} -symmetry breaking at a certain strong-non-Hermiticity boundary. Below this limit the model is shown to be suitable for an explicit illustration of technicalities related to the standard probabilistic physical interpretation of bound states in {\cal PT} -symmetric quantum mechanics.


PACS

03.65.Ge Solutions of wave equations: bound states

03.65.Fd Algebraic methods

03.65.Ca Formalism

02.50.Cw Probability theory

MSC

81Q05 Closed and approximate solutions to the Schrödinger, Dirac, Klein-Gordon and other quantum-mechanical equations

81R15 Operator algebra methods (See also 46Lxx, 81T05)

81R40 Symmetry breaking

60Bxx Probability theory on algebraic and topological structures

Subjects

Computational physics

Quantum information and quantum mechanics

Dates

Issue 22 (3 June 2005)

Received 23 November 2004

Published 18 May 2005



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