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

2024-11-0920020022-248810.1063/1.14614272-s2.0-0035981827https://hdl.handle.net/20.500.14288/2391We give a necessary and sufficient condition for the reality of the spectrum of a non-Hermitian Hamiltonian admitting a complete set of biorthonormal eigenvectors.pdfMathematical physicsPseudo-Hermiticity versus PT-symmetry. II. A complete characterization of non-Hermitian Hamiltonians with a real spectrumJournal Article1089-7658https://doi.org/10.1063/1.1461427175145100042Q3NOIR00574