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Generating nonclassical correlations without fully aligning measurements

Contributors

Wallman, Joel J.; Liang, Yeong Cherng; Bartlett, Stephen D.

Published in

Physical review, A, Atomic, molecular, and optical physics, vol. 83, no. 2

Publication date

2011

Abstract

We investigate the scenario where spatially separated parties perform measurements in randomly chosen bases on an N-partite Greenberger-Horne-Zeilinger state. We show that without any alignment of the measurements, the observers will obtain correlations that violate a Bell inequality with a probability that rapidly approaches 1 as N increases and that this probability is robust against noise. We also prove that restricting these randomly chosen measurements to a plane perpendicular to a common direction will always generate correlations that violate some Bell inequality. Specifically, if each observer chooses their two measurements to be locally orthogonal, then the N observers will violate one of two Bell inequalities by an amount that increases exponentially with N. These results are also robust against noise and perturbations of each observer's reference direction from the common direction.

UNIGE affiliation entities

Citation (ISO format)

WALLMAN, Joel J., LIANG, Yeong Cherng, BARTLETT, Stephen D. Generating nonclassical correlations without fully aligning measurements. In: Physical review, A, Atomic, molecular, and optical physics, 2011, vol. 83, n° 2. doi: 10.1103/PhysRevA.83.022110

Main files (1)

Article (Published version)

Identifiers

Journal ISSN

1050-2947
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475downloads

Technical informations

Creation

13/05/2014 12:56:00

First validation

13/05/2014 12:56:00

Update

14/03/2023 22:56:20

Status update

14/03/2023 22:56:20

Last indexation

30/10/2024 23:09:17
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