Abstract
We argue that the only meaningful geometrical measure of the energy—momentum of states of matter described by a free quantum field theory in a general curved space—time is that provided by a normal ordered energy-momentum operator. We contrast the finite expectation values of this operator with the conventional renormalized expectation values and further argue that the use of renormalization theory is inappropriate in this context.
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Schedule a callMore From: Proceedings of the Royal Society of London. A. Mathematical and Physical Sciences
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