Distillation by repeated measurements: continuous spectrum case

Details Distillation by repeated measurements: continuous spectrum case Distillation by repeated measurements: continuous spectrum case

2010-10-25

arxiv.org/abs/1010.5080v1

Physical Review A (Rapid Communication) 82, 060101(R) (2010)

Physics

Quantum Physics

4 pages, 2 figures

Scientific paper

10.1103/PhysRevA.82.060101

Repeated measurements on a part of a bipartite system strongly affect the other part not measured, whose dynamics is regulated by an effective contracted evolution operator. When the spectrum of this operator is discrete, the latter system is driven into a pure state irrespective of the initial state, provided the spectrum satisfies certain conditions. We here show 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.

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