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On the Real Spectra of Calogero Model with Complex Coupling

Pijush K. Ghosh, Kumar S. Gupta

hep-tharXiv:hep-th/0310276

Abstract

We study the eigenvalue problem of the rational Calogero model with the coupling of the inverse-square interaction as a complex number. We show that although this model is manifestly non-invariant under the combined parity and time-reversal symmetry PT, the eigenstates corresponding to the zero value of the generalized angular momentum have real energies.

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