Pseudo-hermitian interaction between an oscillator and a spin half particle in the external magnetic field

Abstract

We consider a spin half particle in the external magnetic field which couples to a harmonic oscillator through some pseudo-hermitian interaction. We find that the energy eigenvalues for this system are real even though the interaction is not PT invariant.

Latex, no figs, 8 pages. (To appear in Mod. Phys. Lett. A)

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