New insights into uniformly accelerated detector in a quantum field

Shih Yuin Lin, B. L. Hu

Research output: Contribution to journalArticlepeer-review

4 Citations (Scopus)


We obtained an exact solution for a uniformly accelerated Unruh-DeWitt detector interacting with a massless scalar field in (3 + 1) dimensions which enables us to study the entire evolution of the total system, from the initial transient to late-time steady state. We find that the conventional transition probability of the detector from its initial ground state to excited states, as derived from time-dependent perturbation theory over an infinitely long duration of interaction, is valid only in the transient stage and is invalid for cases with proper acceleration smaller than the damping constant. We also found that, unlike in (1 + 1)D results, the (3 + 1)D uniformly accelerated Unruh- DeWitt detector in a steady state does emit a positive radiated power of quantum nature at late-times, but it is not connected to the thermal radiance experienced by the detector in the Unruh effect proper.

Original languageEnglish
Pages (from-to)480-490
Number of pages11
JournalFoundations of Physics
Issue number4-5
Publication statusPublished - 2007 May

All Science Journal Classification (ASJC) codes

  • Physics and Astronomy(all)

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