# Quantum energy inequalities and local covariance II: categorical formulation

@article{Fewster2007QuantumEI, title={Quantum energy inequalities and local covariance II: categorical formulation}, author={Christopher J. Fewster}, journal={General Relativity and Gravitation}, year={2007}, volume={39}, pages={1855-1890} }

We formulate quantum energy inequalities (QEIs) in the framework of locally covariant quantum field theory developed by Brunetti, Fredenhagen and Verch, which is based on notions taken from category theory. This leads to a new viewpoint on the QEIs, and also to the identification of a new structural property of locally covariant quantum field theory, which we call local physical equivalence. Covariant formulations of the numerical range and spectrum of locally covariant fields are given and… CONTINUE READING

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