Astronomy and Astrophysics – Astrophysics – General Relativity and Quantum Cosmology
Scientific paper
2004-01-28
J.Phys.Conf.Ser.68:012027,2007
Astronomy and Astrophysics
Astrophysics
General Relativity and Quantum Cosmology
One reference corrected
Scientific paper
10.1088/1742-6596/68/1/012027
Unruh effect states that the vacuum of a quantum field theory on Minkovski space-time looks like a thermal state for an eternal uniformly accelerated observer. Adaptation to the non eternal case causes a serious problem: if the thermalization of the vacuum depends on the lifetime of the observer, then in principle the latest is able to deduce its lifetime from the measurement of the temperature. This short note aims at underlining that time-energy uncertainty relation allows to adapt Unruh effect to non-eternal observers without breaking causality. In particular we show that our adaptation - the diamonds's temperature- of Bisognano-Wichman approach to Unruh effect is causally acceptable. This note is self-contained but it is fully meaningful as a complement to gr-qc/0212074 as well as a comment on gr-qc/0306022.
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