The Physics of Negative Energy Densities

Details The Physics of Negative Energy Densities The Physics of Negative Energy Densities

1998-11-09

arxiv.org/abs/hep-th/9811081v1

Physics

High Energy Physics

High Energy Physics - Theory

10 pages, latex, uses sprocl, talk given at the Quantum Fields in External Potentials Workshop, Leipzig, 1998

Scientific paper

I review some recent results showing that the physics of negative energy densities, as predicted by relativistic quantum field theories, is more complicated than has generally been appreciated. On the one hand, in external potentials where there is a time--dependence, however slight, the Hamiltonians are unbounded below. On the other, there are limitations of quantum measurement in detecting or utilizing these negative energies.

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