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Second-Order Coherence as an Indicator of Quantum Entanglement of Hawking Radiation in Moving-Mirror Models
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The second-order coherence of light is a widely recognized physical quantity used to assess the quantum characteristics of light, and its properties have been extensively investigated in the field of quantum optics. Recently, it has been proposed that second-order coherence can be utilized as an indicator of quantum entanglement. In this study, we evaluated the second-order coherence in the context of the moving-mirror model, which serves as an analog model for Hawking radiation from a black hole. We discuss the relation between entanglement and the second-order coherence of Hawking radiation paying attention to the noise effect due to the thermality of Hawking radiation, which reduces the quantum correlation in the entanglement-harvesting protocol with two-qubit detectors.
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Cited by 2 Pith papers
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Squeezed quantum states and partner modes in the moving mirror model of black hole evaporation
The moving mirror's radiation can be understood as squeezed Rindler/Milne (Hawking/partner) modes, and the squeezing explains why the spectrum deviates from and yet approximates a thermal distribution while adding cor...
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Energy Flux as an Entanglement Current in Moving-Mirror Radiation
In moving-mirror analog Hawking radiation, negative energy flux is correlated with entanglement growth between local detector modes and is interpreted as an information-return channel tied to partner-mode recovery.
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