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
[31]   Relating the cosmological constant and supersymmetry breaking in warped compactifications of IIB string theory -: art. no. 041901 [J].
Berglund, P ;
Hübsch, T ;
Minic, D .
PHYSICAL REVIEW D, 2003, 67 (04)
[32]   Geometrodynamics of variable-speed-of-light cosmologies -: art. no. 103518 [J].
Bassett, BA ;
Liberati, S ;
Molina-París, C ;
Visser, M .
PHYSICAL REVIEW D, 2000, 62 (10) :1-18
[33]   The flatness problem and Λ -: art. no. 201102 [J].
Lake, K .
PHYSICAL REVIEW LETTERS, 2005, 94 (20)
[34]   Asymptotic behavior of Cardassian cosmologies with exponential potentials -: art. no. 123516 [J].
Lazkoz, R ;
León, G .
PHYSICAL REVIEW D, 2005, 71 (12)
[35]   Multidimensional cosmological models:: Cosmological and astrophysical implications and constraints -: art. no. 044003 [J].
Günther, U ;
Starobinsky, A ;
Zhuk, A .
PHYSICAL REVIEW D, 2004, 69 (04)
[36]   Tunneling through nanographene stacks -: art. no. 045423 [J].
Jäckel, F ;
Watson, MD ;
Müllen, K ;
Rabe, JP .
PHYSICAL REVIEW B, 2006, 73 (04)
[37]   Visual observation of Zener tunneling -: art. no. 023901 [J].
Trompeter, H ;
Pertsch, T ;
Lederer, F ;
Michaelis, D ;
Streppel, U ;
Bräuer, A ;
Peschel, U .
PHYSICAL REVIEW LETTERS, 2006, 96 (02)
[38]   Cosmological expansion and the uniqueness of the gravitational action -: art. no. 024018 [J].
Multamäki, T ;
Vilja, I .
PHYSICAL REVIEW D, 2006, 73 (02)
[39]   Graphical and kinematical approach to cosmological horizons -: art. no. 064009 [J].
Boya, LJ ;
Per, MA ;
Seguí, AJ .
PHYSICAL REVIEW D, 2002, 66 (06)
[40]   Islands in the Λ-sea:: An alternative cosmological model -: art. no. 083507 [J].
Dutta, S ;
Vachaspati, T .
PHYSICAL REVIEW D, 2005, 71 (08) :1-11
12345