Repeated measurements on one part of a bipartite system strongly affect the other part that is not measured, the dynamics of which is regulated by an effective contracted evolution operator. When the spectrum of this operator is discrete, the nonmeasured system is driven into a pure state, irrespective of the initial state, provided that the spectrum satisfies certain conditions. We show here that, even in the case of continuous spectrum, an effective distillation can occur under rather general conditions. We confirm it by applying our formalism to a simple model.

Bellomo, B., Compagno, G., Nakazato, H., Yuasa K (2010). Distillation by repeated measurements: Continuous spectrum case. PHYSICAL REVIEW A, 82, 060101-1-060101-4 [10.1103/PhysRevA.82.060101].

Distillation by repeated measurements: Continuous spectrum case

BELLOMO, Bruno;COMPAGNO, Giuseppe;
2010-01-01

Abstract

Repeated measurements on one part of a bipartite system strongly affect the other part that is not measured, the dynamics of which is regulated by an effective contracted evolution operator. When the spectrum of this operator is discrete, the nonmeasured system is driven into a pure state, irrespective of the initial state, provided that the spectrum satisfies certain conditions. We show here that, even in the case of continuous spectrum, an effective distillation can occur under rather general conditions. We confirm it by applying our formalism to a simple model.
2010
Settore FIS/02 - Fisica Teorica, Modelli E Metodi Matematici
Bellomo, B., Compagno, G., Nakazato, H., Yuasa K (2010). Distillation by repeated measurements: Continuous spectrum case. PHYSICAL REVIEW A, 82, 060101-1-060101-4 [10.1103/PhysRevA.82.060101].
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Utilizza questo identificativo per citare o creare un link a questo documento: https://hdl.handle.net/10447/57873
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