Entanglement amplification via local weak measurements

Yukihiro Ota, Sahel Ashhab, Franco Nori

Research output: Contribution to journalArticle

21 Citations (Scopus)

Abstract

We propose a measurement-based method to produce a maximally-entangled state from a partially-entangled pure state. Our goal can be thought of as entanglement distillation from a single copy of a partially-entangled state. The present approach involves local two-outcome weak measurements. We show that the application of these local weak measurements leads to a probabilistic amplification of entanglement. In addition, we examine how the probability to find the maximally-entangled state is related to the entanglement of the input state. We also study the application of our method to a mixed initial state. We show that the protocol is successful if the separable part of the mixed initial state fulfils certain conditions.

Original languageEnglish
Article number415303
JournalJournal of Physics A: Mathematical and Theoretical
Volume45
Issue number41
DOIs
Publication statusPublished - 19 Oct 2012
Externally publishedYes

Fingerprint

Entangled State
Entanglement
Amplification
Distillation
Pure State
distillation

ASJC Scopus subject areas

  • Mathematical Physics
  • Physics and Astronomy(all)
  • Statistical and Nonlinear Physics
  • Modelling and Simulation
  • Statistics and Probability

Cite this

Entanglement amplification via local weak measurements. / Ota, Yukihiro; Ashhab, Sahel; Nori, Franco.

In: Journal of Physics A: Mathematical and Theoretical, Vol. 45, No. 41, 415303, 19.10.2012.

Research output: Contribution to journalArticle

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