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Identification of observables in quantum toboggans

Miloslav Znojil

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Schrödinger equations for 'quantum toboggans' with real energies are given the generalized eigenvalue-problem form Hψ = EWψ, where HH† and WW† ≠ I. The consistent probabilistic interpretation of these models is provided. The new double-series formula for the necessary ad hoc metric Θ = Θ(H, W) is derived which defines the acceptable inner products in the physical Hilbert space of states. The formula degenerates to the usual single series in the non-tobogganic trivial-weight limit WI.


PACS

03.65.Ge Solutions of wave equations: bound states

03.65.Fd Algebraic methods

02.10.Ud Linear algebra

MSC

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

15A18 Eigenvalues, singular values, and eigenvectors

81Rxx Groups and algebras in quantum theory

Subjects

Mathematical physics

Quantum information and quantum mechanics

Dates

Issue 21 (30 May 2008)

Received 4 March 2008, in final form 15 April 2008

Published 8 May 2008



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