English (United Kingdom)

https://curated-unify.zendy.io/wp-json/zendy-region/v1/featured_content/oa?rat=en

https://curated-unify.zendy.io/wp-json/zendy-region/v1/highlighted_journal/

Global: Zendy Plus annual

Presents the access of premium content as premium feature

Premium Content

Presents the keyphrase highlighting as premium feature

Keyphrase Highlighting

Presents the summarisation as premium feature

Summarisation

Insights

Presents the pdf analysis as premium feature

PDF Analysis

Presents the zaia usage as premium feature

ZAIA

Global: Zendy Plus monthly

Global: Zendy Tools annual

Global: Zendy Tools monthly

Global: Zendy Free Plan

We consider $N$ uniformly-accelerating Unruh-DeWitt detectors whose internaldegrees of freedom are coupled to a massless scalar field in $(1+1)$D Minkowskispace. We use the influence functional formalism to derive the Langevinequations governing the nonequilibrium dynamics of the internal degrees offreedom and show explicitly that the system relaxes in time and equilibrates.We also show that once the equilibrium condition is established a set offluctuation-dissipation relations (FDR) and correlation-propagation relations(CPR) emerges for the detectors, extending earlier results of [1] whichdiscovered these relations for the quantum field. Although similar in form tothe FDRs commonly known from linear response theory, which assumes anequilibrium condition a priori, their physical connotations are dissimilar fromthat of a nonequilibrium origin. We show explicitly that both sets of relationsare needed to guarantee the balance of energy flow in and out of the system indynamical equilibrium with the field. These results are helpful toinvestigations of quantum information and communications of detectors in spaceexperiments and inquiries of theoretical issues in black holes and cosmology.

Fluctuation-Dissipation and Correlation-Propagation Relations from the Nonequilibrium Dynamics of Detector-Quantum Field Systems