We show that two interacting physical systems may admit entangled pure or nonseparable mixed states evolving in time as if the mutual interaction Hamiltonian were absent. In this paper we define these interaction-free evolving (IFE) states and characterize their existence for a generic binary system described by a time-independent Hamiltonian. A comparison between IFE subspace and the decoherence-free subspace is reported. The set of all pure IFE states is explicitly constructed for a nonhomogeneous spin-star-system model
Napoli, A., Guccione, M., Messina, A., Chruscinski, D. (2014). Interaction-free evolving states of a bipartite system. PHYSICAL REVIEW A, 89, 062104-1-062104-6 [10.1103/PhysRevA.89.062104].
Interaction-free evolving states of a bipartite system
NAPOLI, Anna;GUCCIONE, Marina;MESSINA, Antonino;
2014-01-01
Abstract
We show that two interacting physical systems may admit entangled pure or nonseparable mixed states evolving in time as if the mutual interaction Hamiltonian were absent. In this paper we define these interaction-free evolving (IFE) states and characterize their existence for a generic binary system described by a time-independent Hamiltonian. A comparison between IFE subspace and the decoherence-free subspace is reported. The set of all pure IFE states is explicitly constructed for a nonhomogeneous spin-star-system model
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