Unveiling the Hanbury Brown and Twiss effect through Renyi entropy correlations

Abstract

Adopting a quantum information perspective, we analyse the correlations in the thermal light beams used to demonstrate the Hanbury Brown and Twiss effect. We find that the total correlations measured by the Renyi mutual information match the normalised intensity correlations in the regime of low source intensity. Genuine quantum correlations in the form of discord are relevant in such regime but get washed out with increasing source intensity. This provides a new angle on the issue about the nature--quantum versus classical--of the effect.

8 pages, 2 figures. To appear in Physica Scripta, Proceedings of CEWQO-2012

References in corpus (9)

• Introducing Quantum Discord
• Classical, quantum and total correlations
• Correlated imaging, quantum and classical
• Gaussian quantum discord
• Measuring Gaussian quantum information and correlations using the Renyi entropy of order 2
• Purity of Gaussian states: measurement schemes and time-evolution in noisy channels
• Non-classicality criteria from phase-space representations and information-theoretical constraints are maximally inequivalent
• Nature of light correlations in ghost imaging
• Hanbury Brown-Twiss effect and thermal light ghost imaging

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