Twin Hamiltonians, three types of the Dyson maps, and the probabilistic interpretation problem in quasi-Hermitian quantum mechanics
Authors
Aritra Ghosh
Adam Miranowicz
Miloslav Znojil
Abstract
In quasi-Hermitian quantum mechanics (QHQM) of unitary systems, an optimal, calculation-friendly form of Hamiltonian is generally non-Hermitian, $H \neq H^\dagger$. This makes its physical interpretation ambiguous. Without altering $H$, this ambiguity is resolved by specifying a nontrivial inner-product metric $Θ$ in Hilbert space. Here, we focus on an alternative strategy: transforming $H$ into a Hermitian form via the Dyson map $Ω: H \to \mathfrak{h}$. This construction of the Hermitian isospectral twin $\mathfrak{h}$ of $H$ does not only restore the conventional correspondence principle between quantum and classical physics, but it also provides a framework for the exhaustive classification of all admissible probabilistic interpretations of quantum systems in QHQM framework.
