Criteria of quantum correlation in the measurement of continuous variables in optics

2004/07/27 by Nicolas Treps, Treps, Nicolas, Claude Fabre +1 · 3 citations
Engineering · Physics and Astronomy · #FOS: Physical sciences #Photonic and Optical Devices #Quantum Physics (quant-ph) #quant-ph

paper · pdf · doi:10.48550/arxiv.quant-ph/0407214

Submitted to the special issue of Laser Physics in honour of Prof. Herbert Walther

openalex publication_date 2004/07/27 · arxiv created 2004/11/09 · arxiv updated 2009/12/01 · openalex created_date 2025/10/10 · openalex updated_date 2026/07/28

Abstract

The purpose of this short tutorial paper is to review various criteria that have been used to characterize the quantum character of correlations in optical systems, such as "gemellity", QND correlation, intrication, EPR correlation and Bell correlation, to discuss and compare them. This discussion, restricted to the case of measurements of continuous optical variables, includes also an extension of known criteria for "twin beams" to the case of imbalanced correlations.

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