The sensitivity of a repeated measurement-based purification scheme to additional undesired couplings is analyzed, focusing on the very simple and archetypical system consisting of two two-level systems interacting with a repeatedly measured one. Several regimes are considered and in the strong coupling limit (i.e., when the coupling constant of the undesired interaction is very large) the occurrence of a quantum Zeno effect is proven to dramatically jeopardize the efficiency of the purification process.
Militello, B., Napoli, A. (2018). Sensitivity of measurement-based purification processes to inner interactions. PHYSICA SCRIPTA, 93(2), 025101-1-025101-9 [10.1088/1402-4896/aa9c38].
Sensitivity of measurement-based purification processes to inner interactions
Militello, Benedetto
;Napoli, Anna
2018-01-01
Abstract
The sensitivity of a repeated measurement-based purification scheme to additional undesired couplings is analyzed, focusing on the very simple and archetypical system consisting of two two-level systems interacting with a repeatedly measured one. Several regimes are considered and in the strong coupling limit (i.e., when the coupling constant of the undesired interaction is very large) the occurrence of a quantum Zeno effect is proven to dramatically jeopardize the efficiency of the purification process.
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PurifVsZeno-v3.pdf
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Militello-2018-Sensitivity-of-measurement-based-pu.pdf
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