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Non-stationary non-Hermitian "wrong-sign'' quantum oscillators and their meaningful physical interpretation by Znojil, Miloslav is a scholarly article available to read on EtoBox.

What is Non-stationary non-Hermitian "wrong-sign'' quantum oscillators and their meaningful physical interpretation about?

Quantum mechanics of closed, unitary quantum systems can be formulated in non-Hermitian interaction picture (NIP) in which both the states and the observables vary with time. Then, in general, not only the Schr\"{o}dinger-equation generators $G(t)$ but also the Heisenberg-equation generators $\Sigma(t)$ are phenomenologically irrelevant, with spectra which are, in general, complex. Only the sum $H(t)=G(t)+\Sigma(t)$ retains the standard physical meaning of instantaneous energy. For illustration, the ``wrong-sign'' quartic oscillators are recalled and reconsidered.

Author

Znojil, Miloslav

Published

2023

Language

EN