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High Energy Physics - Theory, hep-th
Abstract:
We present an analysis of the Unruh effect from the perspective of the
general boundary formulation of the quantum field theory of a massive scalar
field in Minkowski and Rindler spacetimes. We underline the difficulty in
identifying the Minkowski vacuum state with a superposition of multiparticle
states defined in the double Rindler wedge. However, in contrast to this
"global" version of the Unruh effect we show that a "local" version of it
arises when comparing expectation values of observables quantized with the
Feynman quantization prescription that have compact support restricted to one
of the Rindler wedges. We find that even this notion of local Unruh effect does
not exist when the same observables are quantized according to the
Berezin-Toeplitz quantization scheme.
