Null values and quantum state discrìmination

Oded Zilberberg, Alessandro Romito, David J. Starling, Gregory A. Howland, Curtis J. Broadbent, John C. Howell, Yuval Gefen

Research output: Contribution to journalArticlepeer-review

15 Scopus citations

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.

Original languageEnglish (US)
Article number170405
JournalPhysical review letters
Volume110
Issue number17
DOIs
StatePublished - Apr 25 2013

All Science Journal Classification (ASJC) codes

  • Physics and Astronomy(all)

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