Quantum Energy Inequalities and local covariance I: Globally hyperbolic spacetimes

Details Quantum Energy Inequalities and local covariance I: Globally hyperbolic spacetimes Quantum Energy Inequalities and local covariance I: Globally hyperbolic spacetimes

2006-02-16

arxiv.org/abs/math-ph/0602042v1

J.Math.Phys.47:082303,2006

Physics

Mathematical Physics

34 pages, 5 postscript pictures, 4 pstricks pictures. RevTex4

Scientific paper

We begin a systematic study of Quantum Energy Inequalities (QEIs) in relation to local covariance. We define notions of locally covariant QEIs of both 'absolute' and 'difference' types and show that existing QEIs satisfy these conditions. Local covariance permits us to place constraints on the renormalised stress-energy tensor in one spacetime using QEIs derived in another, in subregions where the two spacetimes are isometric. This is of particular utility where one of the two spacetimes exhibits a high degree of symmetry and the QEIs are available in simple closed form. Various general applications are presented, including a priori constraints (depending only on geometric quantities) on the ground-state energy density in a static spacetime containing locally Minkowskian regions. In addition, we present a number of concrete calculations in both two and four dimensions which demonstrate the consistency of our bounds with various known ground- and thermal state energy densities. Examples considered include the Rindler and Misner spacetimes, and spacetimes with toroidal spatial sections. In this paper we confine the discussion to globally hyperbolic spacetimes; subsequent papers will also discuss spacetimes with boundary and other related issues.

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