Sergi, AlessandroGiaquinta, Paolo V.2017-04-042017-04-042016-12-16Sergi, A. and Giaquinta, P.V. 2016. Linear Quantum Entropy and Non-Hermitian Hamiltonians. Entropy. Vol 18(451): 1-11.1099-4300http://hdl.handle.net/10321/2427We consider the description of open quantum systems with probability sinks (or sources) in terms of general non-Hermitian Hamiltonians. Within such a framework, we study novel possible definitions of the quantum linear entropy as an indicator of the flow of information during the dynamics. Such linear entropy functionals are necessary in the case of a partially Wigner-transformed non-Hermitian Hamiltonian (which is typically useful within a mixed quantum-classical representation). Both the case of a system represented by a pure non-Hermitian Hamiltonian as well as that of the case of non-Hermitian dynamics in a classical bath are explicitly considered11 p.ennon-Hermitian quantum mechanicsQuantum entropyQuantum-classical theoryArticle10.3390/e18120451