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Abstract:

Hamiltonian diagonalization, as a tool to define the vacuum state of a massless field, is studied in two-dimensional space-time. The Hamiltonian definition depends on the time notion, i.e., on the manner in which space-time is foliated to separate space and time. According to which foliation is chosen, conformal or nonconformal vacua are obtained, and all these vacua result to be renormalizable. The formalism is applied to the eternal black-hole geometry, where the foliation attached to Unruhs vacuum definition is found, and the quantization in geodesic reference systems is studied. In four dimensions it is shown that the Unruh vacuum can also be introduced as the state diagonalizing the Hamiltonian, when Unruhs time goes to minus infinity. © 1991 The American Physical Society.

Registro:

Documento: Artículo
Título:Conformal and nonconformal vacua for massless fields: Unruh vacuum and geodesic vacua in Schwarzschild geometry
Autor:Castagnino, M.; Ferraro, R.
Filiación:Instituto de Astronomía y Física Del Espacio, Casilla de Correo 67-Sucursal 28, 1428 Buenos Aires, Argentina
Departamento de Física, Facultad de Ciencias Exactas y Naturales, Pab. i, 428 Buenos Aires, Argentina
Instituto de Física Rosario, Consejo Nacional de Investigaciones Científicas y Técnicas, Av. Pellegrini 250, 2000 Rosario, Argentina
Año:1991
Volumen:43
Número:8
Página de inicio:2610
Página de fin:2616
DOI: http://dx.doi.org/10.1103/PhysRevD.43.2610
Título revista:Physical Review D
ISSN:05562821
Registro:https://bibliotecadigital.exactas.uba.ar/collection/paper/document/paper_05562821_v43_n8_p2610_Castagnino

Referencias:

  • Davies, P.C.W., Fulling, S.A., Christensen, S.M., Wald, R.M., (1977) Ann. Phys. (N.Y.), 109, p. 108
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Citas:

---------- APA ----------
Castagnino, M. & Ferraro, R. (1991) . Conformal and nonconformal vacua for massless fields: Unruh vacuum and geodesic vacua in Schwarzschild geometry. Physical Review D, 43(8), 2610-2616.
http://dx.doi.org/10.1103/PhysRevD.43.2610
---------- CHICAGO ----------
Castagnino, M., Ferraro, R. "Conformal and nonconformal vacua for massless fields: Unruh vacuum and geodesic vacua in Schwarzschild geometry" . Physical Review D 43, no. 8 (1991) : 2610-2616.
http://dx.doi.org/10.1103/PhysRevD.43.2610
---------- MLA ----------
Castagnino, M., Ferraro, R. "Conformal and nonconformal vacua for massless fields: Unruh vacuum and geodesic vacua in Schwarzschild geometry" . Physical Review D, vol. 43, no. 8, 1991, pp. 2610-2616.
http://dx.doi.org/10.1103/PhysRevD.43.2610
---------- VANCOUVER ----------
Castagnino, M., Ferraro, R. Conformal and nonconformal vacua for massless fields: Unruh vacuum and geodesic vacua in Schwarzschild geometry. 1991;43(8):2610-2616.
http://dx.doi.org/10.1103/PhysRevD.43.2610