INVESTIGADORES
ALVAREZ Ezequiel
artículos
Título:
Vacuum polarization around stars: nonlocal approximation
Autor/es:
ALEJANDRO SATZ, FRANCISCO D. MAZZITELLI, EZEQUIEL ALVAREZ
Revista:
PHYSICAL REVIEW D - PARTICLE AND FILDS
Editorial:
American Physical Sociey
Referencias:
Lugar: Oak Ridge; Año: 2005 vol. 71 p. 640010 - 640010
ISSN:
0556-2821
Resumen:
 We compute the vacuum polarization associated with quantum massless fields around stars with spherical symmetry. The nonlocal contribution to the vacuum polarization is dominant in the weak field limit, and induces quantum corrections to the exterior metric that depend on the inner structure of the star. It also violates the null energy conditions. We argue that similar results also hold in the low energy limit of quantum gravity. Previous calculations of the vacuum polarization in spherically symmetric spacetimes, based on local approximations, are not adequate for newtonian stars.
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