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Pseudo-Hermiticity versus PT-symmetry. II: A complete characterization of non-Hermitian Hamiltonians with a real spectrum

Journal of Mathematical Physics (2002) 43(5) 2814-2816
DOI: 10.1063/1.1461427
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Abstract

We give a necessary and sufficient condition for the reality of the spectrum of a non-Hermitian Hamiltonian admitting a complete set of biorthonormal eigenvectors. © 2002 American Institute of Physics.

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Mostafazadeh, A. (2002). Pseudo-Hermiticity versus PT-symmetry. II: A complete characterization of non-Hermitian Hamiltonians with a real spectrum. Journal of Mathematical Physics, 43(5), 2814–2816. https://doi.org/10.1063/1.1461427

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