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Infinite series of time-dependent Dyson maps

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We propose and explore a scheme that leads to an infinite series of timedependent Dyson maps which associate different Hermitian Hamiltonians to a uniquely specified time-dependent non-Hermitian Hamiltonian. We identify… Click to show full abstract

We propose and explore a scheme that leads to an infinite series of timedependent Dyson maps which associate different Hermitian Hamiltonians to a uniquely specified time-dependent non-Hermitian Hamiltonian. We identify the underlying symmetries responsible for this feature respected by various Lewis-Riesenfeld invariants. The latter are used to facilitate the explicit construction of the Dyson maps and metric operators. As a concrete example for which the scheme is worked out in detail we present a two-dimensional system of oscillators that are coupled to each other in a non-Hermitian PT -symmetrical fashion.

Keywords: infinite series; dyson; time dependent; dyson maps

Journal Title: Journal of Physics A: Mathematical and Theoretical
Year Published: 2021

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