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Accelerated paths and Unruh effect II: finite time detector response in (Anti) de Sitter spacetime and Huygen's Principle

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arxiv 2301.08717 v2 pith:3I5R6ENR submitted 2023-01-20 hep-th gr-qc

Shahnewaz Ahmed , Mir Mehedi Faruk , Muktadir Rahman This is my paper · ORCID
classification hep-thgr-qc
keywords detectorresponsebackgrounddimensionalfinitehuygenmasslessprinciple
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abstract

We study the finite time response of an Unruh-DeWitt particle detector described by a qubit (two-level system) moving with uniform constant acceleration in maximally symmetric spacetimes. The $D$ dimensional massless fermionic response function in de Sitter (dS) background is found to be identical to that of a detector linearly coupled to a massless scalar field in $2D$ dimensional dS background. Furthermore, we visit the status of Huygen's principle in the Unruh radiation observed by the detector.

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  1. Quasinormal Modes and the Switchback Effect in Schwarzschild-de Sitter

    hep-th 2025-01 conditional novelty 6.0 of 10

    The paper derives eikonal quasinormal mode frequencies and shock-wave switchback delays in Schwarzschild-de Sitter for arbitrary mass, using static-sphere observers and reflecting boundary conditions.

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