Null Values and Quantum State Discrimination

Authors

Oded Zilberberg, Weizmann Institute of Science
Alessandro Romito, Freie Universität Berlin
David J. Starling, University of Rochester
Gregory A. Howland, University of Rochester
Curtis J. Broadbent, University of Rochester
John C. Howell, Chapman UniversityFollow
Yuval Gefen, Weizmann Institute of Science

Document Type

Article

Publication Date

4-25-2013

Abstract

We present a measurement protocol for discriminating between two different quantum states of a qubit with high fidelity. The protocol, called null value, is comprised of a projective measurement performed on the system with a small probability (also known as partial collapse), followed by a tuned postselection. We report on an optical experimental implementation of the scheme. We show that our protocol leads to an amplified signal-to-noise ratio (as compared with a straightforward strong measurement) when discerning between the two quantum states.

Comments

This article was originally published in Physical Review Letters, volume 110, issue 17, in 2013. https://doi.org/10.1103/PhysRevLett.110.170405

Recommended Citation

O. Zilberberg, A. Romito, D. J. Starling, G. A. Howland, and C. J. Broadbent, Null Values and Quantum State Discrimination, Phys. Rev. Lett. 110(17), 170405.

Peer Reviewed

1

Copyright

American Physical Society