Qubit Heating Near a Hotspot
| Autor: | Richard Holman, C.P. Burgess, Greg Kaplanek |
|---|---|
| Rok vydání: | 2021 |
| Předmět: |
High Energy Physics - Theory
Physics Length scale Nuclear and High Energy Physics Toy model Black Holes Degrees of freedom (statistics) FOS: Physical sciences Effective Field Theories QC770-798 Massless particle Black hole Coupling (physics) General Relativity and Quantum Cosmology Computer Science::Emerging Technologies High Energy Physics - Theory (hep-th) Qubit Nuclear and particle physics. Atomic energy. Radioactivity Renormalization Group Renormalization Regularization and Renormalons Statistical physics Quantum field theory |
| Zdroj: | Journal of High Energy Physics, Vol 2021, Iss 8, Pp 1-36 (2021) Journal of High Energy Physics |
| DOI: | 10.48550/arxiv.2106.10803 |
| Popis: | Effective theories describing black hole exteriors contain many open-system features due to the large number of gapless degrees of freedom that lie beyond reach across the horizon. A simple solvable Caldeira-Leggett type model of a quantum field interacting within a small area with many unmeasured thermal degrees of freedom was recently proposed in arXiv:2106.09854 to provide a toy model of this kind of dynamics against which more complete black hole calculations might be compared. We here compute the response of a simple Unruh-DeWitt detector (or qubit) interacting with a massless quantum field $\phi$ coupled to such a hotspot. Our treatment differs from traditional treatments of Unruh-DeWitt detectors by using Open-EFT tools to reliably calculate the qubit's late-time behaviour. We use these tools to determine the efficiency with which the qubit thermalizes as a function of its proximity to the hotspot. We identify a Markovian regime in which thermalization does occur, though only for qubits closer to the hotspot than a characteristic distance scale set by the $\phi$-hotspot coupling. We compute the thermalization time, and find that it varies inversely with the $\phi$-qubit coupling strength in the standard way. Comment: 16 pages + appendices, 1 figure v2) now published in JHEP, typos fixed |
| Databáze: | OpenAIRE |
| Externí odkaz: |
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