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Fisher Information of a Black Hole Spacetime

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arxiv 2207.12226 v2 pith:JCW5KSSQ submitted 2022-07-25 gr-qc hep-thquant-ph

classification gr-qchep-thquant-ph
keywords blackfisherholeinformationdetectorquantumrelativisticanti-de
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Relativistic quantum metrology is the study of optimal measurement procedures within systems that have both quantum and relativistic components. Here we use Unruh-DeWitt detectors coupled to a massless scalar field as probes of thermal parameters in different spacetimes via a relativistic quantum metrology analysis. We consider both (2+1)-dimensional anti-de Sitter and BTZ black hole spacetimes. We compute the Fisher information to identify characteristics of the black hole spacetime and to compare it to a uniformly accelerating detector in anti-de Sitter space. We find the dependence of the Fisher information on temperature, detector energy gap, black hole mass, interaction time, and the initial state of the detector. We identify strategies that maximize the Fisher information and therefore the precision of estimation.

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Cited by 1 Pith paper

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

  1. Delay-Independent Stability of Nonlinear Delay Differential Equations via Isospectral Reduction

    math.DS 2025-08 unverdicted novelty 5.0 of 10

    Claims a delay-independent global exponential stability criterion for a broad class of nonlinear nonautonomous delay differential equations using isospectral reduction of an associated sequence of matrices.

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