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Purification and redistribution of entanglement via single local filtering

K. O. Yashodamma

Department of Physics, Kuvempu University, Shankaraghatta, Karnataka, 577 451, India

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P. J. Geetha

Department of Physics, Kuvempu University, Shankaraghatta, Karnataka, 577 451, India

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, and

Sudha

Department of Physics, Kuvempu University, Shankaraghatta, Karnataka, 577 451, India

Inspire Institute Inc., Alexandria, Virginia 22303, USA

Corresponding author.

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https://doi.org/10.1142/S021974991450004XCited by:5 (Source: Crossref)

Abstract

The effect of filtering operation with respect to purification and concentration of entanglement in quantum states are discussed in this paper. It is shown, through examples, that the local action of the filtering operator on a part of the composite quantum state allows for purification of the remaining part of the state. The redistribution of entanglement in the subsystems of a noise affected state is shown to be due to the action of local filtering on the non-decohering part of the system. The varying effects of the filtering parameter, on the entanglement transfer between the subsystems, depending on the choice of the initial quantum state is illustrated.

Keywords:

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