A measurement scheme for purity based on two two-body gates
Quantum Physics
2012-10-02 v3
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 square root of SWAP gates and only hinges 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 is needed.
Cite
@article{arxiv.1201.2736,
title = {A measurement scheme for purity based on two two-body gates},
author = {Hiromichi Nakazato and Toru Tanaka and Kazuya Yuasa and Giuseppe Florio and Saverio Pascazio},
journal= {arXiv preprint arXiv:1201.2736},
year = {2012}
}
Comments
7pages, 1figure