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Natalia Bebiano

Publications and source records attributed to Natalia Bebiano.

2 recordsLinked to original sources

Spectral analysis of a selected non self-adjoint Hamiltonian in an infinite dimensional Hilbert space

The so-called equation of motion method is useful to obtain the explicit form of the eigenvectors and eigenvalues of certain non self-adjoint bosonic Hamiltonians with real eigenvalues. These operators can be diagonalized when they are expressed in terms of pseudo-bosons, which do not behave as ordinary bosons under the adjoint transformation, but obey the Weil-Heisenberg commutation relations.

quant-ph↗

Direct and inverse spectral problems for a class of non-selfadjoint band matrices

The spectral properties of a class of band matrices are investigated. The reconstruction of matrices of this special class from given spectral data is also studied. Necessary and sufficient conditions for that reconstruction are found. The obtained results extend some results on the direct and inverse spectral problems for periodic Jacobi matrices and for some non-self-adjoint tridiagonal matrices.

math.SP↗