- Access by Xinjiang University
Role of a "local" cosmological constant in Euclidean quantum gravity
Phys. Rev. D 54, 5002 – Published 15 October, 1996
DOI: https://doi.org/10.1103/PhysRevD.54.5002
Abstract
In 4D nonperturbative Regge calculus a positive value of the effective cosmological constant characterizes the collapsed phase of the system. If a local term of the form is added to the gravitational action, where is a subset of the hinges and are positive constants, one expects that the volumes tend to collapse and that the excitations of the lattice propagating through the hinges are damped. We study the continuum analogue of this effect. The additional term may represent the coupling of the gravitational field to an external Bose condensate.
References (15)
- M. J. G. Veltman, in Methods in Field Theory, Proceedings of the Les Houches Summer School, Les Houches, France, 1975, edited by R. Balian and J. Zinn-Justin, Les Houches Summer School Proceedings Vol. XXVIII (North-Holland, Amsterdam, 1976)
- S. Weinberg, Rev. Mod. Phys. 61, 1 (1989) J. Greensite, Phys. Lett. B 291, 405 (1992)
- H. W. Hamber and R. M. Williams, Nucl. Phys. B248, 392 (1984) ibid.B260, 747 (1985) Phys. Lett. 157B, 368 (1985) Nucl. Phys. B269, 712 (1986) H. W. Hamber, in Critical Phenomena, Random Systems and Gauge Theories, Proceedings of the Les Houches Summer School, Les Houches, France, 1984, edited by K. Osterwalder and R. Stora, Les Houches Summer School Proceedings Vol. XLIII (North-Holland, Amsterdam, 1986) Phys. Rev. D 45, 507 (1992) Nucl. Phys. B400, 347 (1993)
- G. Modanese, Phys. Lett. B 325, 354 (1994) Nucl. Phys. B434, 697 (1995) Riv. Nuovo Cimento 17, 8 (1994)
- H. W. Hamber and R. M. Williams, Nucl. Phys. B435, 361 (1995)
- L. Garay, Int. J. Math. Phys. A 10, 145 (1995)
- C. Rovelli and L. Smolin, Nucl. Phys. B442, 593 (1995)
- G. Modanese, Phys. Lett. B 348, 51 (1995)
- N. C. Tsamis and R. P. Woodard, Phys. Lett. B 301, 351 (1993) Commun. Math. Phys. 162, 217 (1994) Ann. Phys. (N.Y.) 238, 1 (1995)
- A. D. Dolgov, M. B. Einhorn, and V. I. Zakharov, Phys. Rev. D 52, 717 (1995)
- H. Van Dam and M. Veltman, Nucl. Phys. B22, 397 (1970) L. H. Ford and H. Van Dam, ibid. B169, 126 (1980)
- I. J. Muzinich and S. Vokos, Phys. Rev. D 52, 3472 (1995)
- E. Elizalde, C. Lousto, S. Odintsov, and A. Romeo, Phys. Rev. D 52, 2202 (1995) J. F. Donoghue, 72, 2996 (1994) H. W. Hamber and S. Liu, Phys. Lett. B 357, 51 (1995)
- G. Modanese, Europhys. Lett. (to be published) "Updating the theoretical analysis of the weak gravitational shielding experiment," Report No. UTF-367/96, 1996 (supr-con/9601001) (unpublished)
- E. Podkletnov and R. Nieminen, Physica C 203, 441 (1992) E. Podkletnov and A.D. Levit, "Gravitational shielding properties of composite bulk superconductor below 70 K under electro-magnetic field," Tampere University of Technology Report No. MSU-chem, 1995 (unpublished)