Measurement scheme for purity based on two two-body gates

H. Nakazato; T. Tanaka; K. Yuasa; G. Florio; S. Pascazio

doi:10.1103/PhysRevA.85.042316

Measurement scheme for purity based on two two-body gates

H. Nakazato^*, T. Tanaka, K. Yuasa, G. Florio, S. Pascazio

^*Corresponding author for this work

School of Advanced Science and Engineering

Research output: Contribution to journal › Article › peer-review

17 Citations (Scopus)

Abstract

A scheme for measuring the purity of a quantum system with a finite number of levels is presented. The method makes use of two √swap gates and hinges only on measurements performed on a reference system, prepared in a certain pure state and coupled with the target system. Neither tomographic methods, with the complete reconstruction of the state, nor interferometric setups are needed.

Original language	English
Article number	042316
Journal	Physical Review A - Atomic, Molecular, and Optical Physics
Volume	85
Issue number	4
DOIs	https://doi.org/10.1103/PhysRevA.85.042316
Publication status	Published - 2012 Apr 16

ASJC Scopus subject areas

Atomic and Molecular Physics, and Optics

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10.1103/PhysRevA.85.042316

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title = "Measurement scheme for purity based on two two-body gates",

abstract = "A scheme for measuring the purity of a quantum system with a finite number of levels is presented. The method makes use of two √swap gates and hinges only on measurements performed on a reference system, prepared in a certain pure state and coupled with the target system. Neither tomographic methods, with the complete reconstruction of the state, nor interferometric setups are needed.",

author = "H. Nakazato and T. Tanaka and K. Yuasa and G. Florio and S. Pascazio",

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AU - Nakazato, H.

AU - Tanaka, T.

AU - Yuasa, K.

AU - Florio, G.

AU - Pascazio, S.

PY - 2012/4/16

Y1 - 2012/4/16

N2 - A scheme for measuring the purity of a quantum system with a finite number of levels is presented. The method makes use of two √swap gates and hinges only on measurements performed on a reference system, prepared in a certain pure state and coupled with the target system. Neither tomographic methods, with the complete reconstruction of the state, nor interferometric setups are needed.

AB - A scheme for measuring the purity of a quantum system with a finite number of levels is presented. The method makes use of two √swap gates and hinges only on measurements performed on a reference system, prepared in a certain pure state and coupled with the target system. Neither tomographic methods, with the complete reconstruction of the state, nor interferometric setups are needed.

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Measurement scheme for purity based on two two-body gates

Abstract

ASJC Scopus subject areas

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