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math-ph2025
Density matrices and entropy operator for non-Hermitian quantum mechanics
Fabio Bagarello, Francesco Gargano, Lidia Saluto
In this paper we consider density matrices operator related to non-Hermitian Hamiltonians. In particular, we analyse two natural extensions of what is usually called a density matr…
math-ph2014★ 22 cited
Model pseudofermionic systems: connections with exceptional points
F. Bagarello, F. Gargano
We discuss the role of pseudo-fermions in the analysis of some two-dimensional models, recently introduced in connection with non self-adjoint hamiltonians. Among other aspects, we…