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Probing Vacuum Field Fluctuations and Source Radiation Separately in Space and Time

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arxiv 2305.06387 v2 pith:GUSCXKBE submitted 2023-05-10 quant-ph

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keywords radiationfluctuationssourcevacuumallowscasimircausalityconnection
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Source radiation (radiation reaction) and vacuum-field fluctuations can be seen as two inseparable contributions to processes such as spontaneous emission, the Lamb shift, or the Casimir force. Here, we propose how they can be individually probed and their space-time structure revealed in electro-optic sampling experiments. This allows to experimentally study causality at the single photon level and to reveal space- and time-like correlations in the quantum vacuum. A connection to the time-domain fluctuation-dissipation theorem is also made.

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Reviewed papers in the Pith corpus that reference this work. Sorted by Pith novelty score. Full citation record

  1. Towards an experimental implementation of entanglement harvesting in superconducting circuits: effect of detector gap variation on entanglement harvesting

    quant-ph 2025-05 conditional novelty 6.0 of 10

    For a circuit-motivated variable-gap, derivative-coupling detector, gap variation suppresses spacelike entanglement harvesting, while causally connected detectors still harvest genuine field entanglement.

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