Tunneling in Λ decaying cosmologies and the cosmological constant problem -: art. no. 063514.

被引：0
作者：
Jafarizadeh, MA [1 ]
Darabi, F
Rezaei-Aghdam, A
Rastegar, AR
机构：
[1] Tabriz Univ, Dept Theoret Phys, Tabriz 51664, Iran
[2] Inst Studies Theoret Phys & Math, Tehran 193951795, Iran
[3] Shahid Beheshti Univ, Dept Phys, Tehran 19839, Iran
[4] Tarbiyat Moallem Univ, Dept Phys, Tabriz, Iran
来源：
PHYSICAL REVIEW D | 1999年 / 60卷 / 06期
关键词：
D O I：
暂无
中图分类号：
P1 [天文学];
学科分类号：
0704 ;
摘要：
The tunneling rate, with an exact prefactor, is calculated to first order in (h) over bar for an empty closed Friedmann-Robertson-Walker universe with a decaying cosmological term Lambda similar to R-m (R is the scale factor and m is a parameter 0 less than or equal to m less than or equal to 2). This model is equivalent to a cosmology with the equation of state p(chi)=(m/3-1)rho(chi). The calculations are performed by applying the dilute-instanton approximation on the corresponding Duru-Kleinert path integral. It is shown that the highest tunneling rate occurs for m = 2 corresponding to the cosmic string matter universe. The most probable cosmological term obtained, such as the one obtained by Strominger, accounts for a possible solution to the cosmological constant problem. [S0556-2821(99)03016-7].
引用
收藏
页数：8
相关论文
共 50 条
[41]   Cosmological models and renormalization group flow -: art. no. 011 [J].
Kristjánsson, KR ;
Thorlacius, L .
JOURNAL OF HIGH ENERGY PHYSICS, 2002, (05)
[42]   New cosmological tracker solution for quintessence -: art. no. 081302 [J].
Ureña-López, LA ;
Matos, T .
PHYSICAL REVIEW D, 2000, 62 (08) :4
[43]   Hydrodynamic approach to the evolution of cosmological structures -: art. no. 103501 [J].
Domínguez, A .
PHYSICAL REVIEW D, 2000, 62 (10) :1-9
[44]   Analyse this!: A cosmological constraint package for CMBEASY -: art. no. 003 [J].
Doran, M ;
Müller, CM .
JOURNAL OF COSMOLOGY AND ASTROPARTICLE PHYSICS, 2004, (09) :37-52
[45]   How a brane cosmological constant can trick us into thinking that w <-1 -: art. no. 101501 [J].
Lue, A ;
Starkman, GD .
PHYSICAL REVIEW D, 2004, 70 (10) :5
[46]   Bounds on the possible evolution of the gravitational constant from cosmological type-Ia supernovae -: art. no. 023506 [J].
Gaztañaga, E ;
García-Berro, E ;
Isern, J ;
Bravo, E ;
Domínguez, I .
PHYSICAL REVIEW D, 2002, 65 (02)
[47]   Sensitivity to θ13 and δ in the decaying astrophysical neutrino scenario -: art. no. 017303 [J].
Beacom, JF ;
Bell, NF ;
Hooper, D ;
Pakvasa, S ;
Weiler, TJ .
PHYSICAL REVIEW D, 2004, 69 (01)
[48]   Homogeneous cosmologies from the quasi-Maxwell formalism -: art. no. 082501 [J].
Costa, J ;
Natário, J .
JOURNAL OF MATHEMATICAL PHYSICS, 2005, 46 (08)
[49]   Time scale of forerunners in quantum tunneling -: art. no. 042119 [J].
García-Calderón, G ;
Villavicencio, J ;
Delgado, F ;
Muga, JG .
PHYSICAL REVIEW A, 2002, 66 (04) :6
[50]   Resonant effect of Zener tunneling current -: art. no. 233308 [J].
Morifuji, M ;
Imai, T ;
Hamaguchi, C ;
Di Carlo, A ;
Vogl, P ;
Böhm, G ;
Tränkle, G ;
Weimann, G .
PHYSICAL REVIEW B, 2002, 65 (23) :2333081-2333084
12345