A Consistent Histories approach to the Unruh effect

Details A Consistent Histories approach to the Unruh effect A Consistent Histories approach to the Unruh effect

2000-05-16

arxiv.org/abs/gr-qc/0005063v1

Int.J.Theor.Phys. 40 (2001) 1411-1426

Astronomy and Astrophysics

Astrophysics

General Relativity and Quantum Cosmology

18 pages LaTeX

Scientific paper

Using the HPO approach to consistent histories we re-derive Unruh's result that an observer constantly accelerating through the Minkowski vacuum appears to be immersed in a thermal bath. We show that propositions about any symmetry of the system always form a consistent set and that the probabilities associated with such propositions are decided by their value in the initial state. We use this fact to postulate a condition on the decoherence functional in the HPO set-up. Finally we show that the Unruh effect arises from the fact that the initial density matrix corresponding to the inertial vacuum can be written as a thermal density matrix in the Fock basis associated with the accelerating observer.

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