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Entanglement structure of quantum fields through local probes

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arxiv 2301.08775 v2 pith:7FSJ6HXJ submitted 2023-01-20 quant-ph gr-qchep-th

Bruno de S. L. Torres , Kelly Wurtz , José Polo-Gómez , Eduardo Martín-Martínez This is my paper · ORCID
classification quant-phgr-qchep-th
keywords entanglementquantumfieldframeworkspacetimestructuretheoryused
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We present a framework to study the entanglement structure of a quantum field theory inspired by the formalism of particle detectors in relativistic quantum information. This framework can in principle be used to faithfully capture entanglement in a QFT between arbitrary-shaped regions of spacetime without encountering UV divergences, bypassing many of the issues typically present in other approaches. Our results also establish the limits of the efficiency of entanglement harvesting, and may also be used to motivate an operational definition of entanglement between spacetime subregions in field theory.

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    Gravitational dressing in JT gravity lets an infalling Unruh-DeWitt detector detect the horizon location and temperature locally, violating the equivalence principle without a firewall.

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