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Weak and strong quantum vacuum: Properties of the different vacua

Mario A. Castagnino

Luis Chimento

  • Instituto de Astronomia y Fisica del Espacio Casilla de Correos 67, Sucursal 28, 1428 Buenos Aires, Argentina and Instituto de Fisica Rosario, Av. Pellegrini 250, 2000 Rosario, Argentina

  • Departamento de Fisica, Facultad de Ciencias Exactas y Naturales, Universidad Nacional de Buenos Aires, Ciudad Universitaria, Pabellón I, Buenos Aires, Argentina

Phys. Rev. D 34, 3676 – Published 15 December, 1986

DOI: https://doi.org/10.1103/PhysRevD.34.3676

Abstract

The ideas, definitions, and results of Castagnino and of Castagnino and Mazzitelli are improved and developed in a more general geometry. Also, a more satisfactory definition of the weak vacuum (defined by the coincidence of a local and a global property up to the lowest order) is introduced which yields a renormalization vacuum expectation value of the energy-momentum tensor. It is proved that a strong vacuum (defined by the same coincidence up to all orders) exists only in two particular cases: if there exists a Killing vector field or in the conformal massless case.

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