TY - JOUR
T1 - New insights into uniformly accelerated detector in a quantum field
AU - Lin, Shih Yuin
AU - Hu, B. L.
N1 - Funding Information:
This work is supported in part by the NSC Taiwan under grant NSC93-2112-M-001-014 and by the US NSF under grant PHY-0601550 and PHY-0426696.
PY - 2007/5
Y1 - 2007/5
N2 - 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.
AB - 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.
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U2 - 10.1007/s10701-007-9120-1
DO - 10.1007/s10701-007-9120-1
M3 - Article
AN - SCOPUS:34249036777
VL - 37
SP - 480
EP - 490
JO - Foundations of Physics
JF - Foundations of Physics
SN - 0015-9018
IS - 4-5
ER -