An interaction free evolving state of a closed bipartite system composed of two interacting subsystems is a generally mixed state evolving as if the interaction were a c-number. In this paper we find the characteristic equation of states possessing similar properties for a bipartite systems governed by a linear dynamical equation whose generator is sum of a free term and an interaction term. In particular in the case of a small system coupled to its environment, we deduce the characteristic equation of decoherence free states namely mixed states evolving as if the interaction term were effectively inactive. Several examples illustrate the applicability of our theory in different physical contexts.

Chruściński, D., Napoli, A., Guccione, M., Nalezyty, P., Messina, A. (2015). Interaction free and decoherence free states. PHYSICA SCRIPTA, 90(7) [10.1088/0031-8949/90/7/074040].

Interaction free and decoherence free states

NAPOLI, Anna
;
GUCCIONE, Marina;MESSINA, Antonino
2015-01-01

Abstract

An interaction free evolving state of a closed bipartite system composed of two interacting subsystems is a generally mixed state evolving as if the interaction were a c-number. In this paper we find the characteristic equation of states possessing similar properties for a bipartite systems governed by a linear dynamical equation whose generator is sum of a free term and an interaction term. In particular in the case of a small system coupled to its environment, we deduce the characteristic equation of decoherence free states namely mixed states evolving as if the interaction term were effectively inactive. Several examples illustrate the applicability of our theory in different physical contexts.
2015
Chruściński, D., Napoli, A., Guccione, M., Nalezyty, P., Messina, A. (2015). Interaction free and decoherence free states. PHYSICA SCRIPTA, 90(7) [10.1088/0031-8949/90/7/074040].
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Utilizza questo identificativo per citare o creare un link a questo documento: https://hdl.handle.net/10447/157178
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