Holographic dark energy in Brans-Dicke theory

被引：66

作者：

Xu, Lixin ^{[1
]}

Li, Wenbo ^{[1
]}

Lu, Jianbo ^{[1
]}

机构：

[1] Dalian Univ Technol, Inst Theoret Phys, Sch Phys & Optoelect Technol, Dalian 116024, Peoples R China

来源：

EUROPEAN PHYSICAL JOURNAL C | 2009年 / 60卷 / 01期

关键词：

COSMOLOGICAL CONSTANT; CONSTRAINTS; UNIVERSE; LAMBDA;

D O I：

10.1140/epjc/s10052-008-0858-1

中图分类号：

O412 [相对论、场论]; O572.2 [粒子物理学];

学科分类号：

摘要：

In this paper, the holographic dark-energy model is considered in Brans-Dicke theory, where the holographic dark-energy density rho(Lambda) = 3c(2)M(pl)(2)L(-2) is replaced by rho(h) = 3c(2)Phi(t)L-2. Here Phi(t) = 1/8 pi G is the time-variable Newton constant. With this replacement, it is found that no accelerated expansion for the universe will be achieved when the Hubble horizon is taken to play the role of an IR cut-off. When the event horizon is adopted as the IR cut-off, accelerated expansion for the universe is obtained. In this case, the equation of state of holographic dark energy, w(h), takes the modified form w(h) = -1/3(1 + alpha + 2/c root Omega(h)). In the limit alpha -> 0, the 'standard' holographic dark energy is recovered. In the holographic dark-energy dominated epoch, power-law and de Sitter time-space solutions are obtained.

引用

页码：135 / 140

页数：6

共 42 条

[21] A model of holographic dark energy [J].

Li, M .

PHYSICS LETTERS B, 2004, 603 (1-2) :1-5

[22] AN INFLATIONARY UNIVERSE IN BRANS-DICKE THEORY - A HOPEFUL SIGN OF THEORETICAL ESTIMATION OF THE GRAVITATIONAL CONSTANT [J].

MATHIAZHAGAN, C ;

JOHRI, VB .

CLASSICAL AND QUANTUM GRAVITY, 1984, 1 (02) :L29-L32

[23]

Nayak B., ARXIV08032930

[24] Cosmological constant - the weight of the vacuum [J].

Padmanabhan, T .

PHYSICS REPORTS-REVIEW SECTION OF PHYSICS LETTERS, 2003, 380 (5-6) :235-320

[25] The cosmological constant and dark energy [J].

Peebles, PJE ;

Ratra, B .

REVIEWS OF MODERN PHYSICS, 2003, 75 (02) :559-606

[26] Measurements of Ω and Λ from 42 high-redshift supernovae [J].

Perlmutter, S ;

Aldering, G ;

Goldhaber, G ;

Knop, RA ;

Nugent, P ;

Castro, PG ;

Deustua, S ;

Fabbro, S ;

Goobar, A ;

Groom, DE ;

Hook, IM ;

Kim, AG ;

Kim, MY ;

Lee, JC ;

Nunes, NJ ;

Pain, R ;

Pennypacker, CR ;

Quimby, R ;

Lidman, C ;

Ellis, RS ;

Irwin, M ;

McMahon, RG ;

Ruiz-Lapuente, P ;

Walton, N ;

Schaefer, B ;

Boyle, BJ ;

Filippenko, AV ;

Matheson, T ;

Fruchter, AS ;

Panagia, N ;

Newberg, HJM ;

Couch, WJ .

ASTROPHYSICAL JOURNAL, 1999, 517 (02) :565-586

[27] Observational evidence from supernovae for an accelerating universe and a cosmological constant [J].

Riess, AG ;

Filippenko, AV ;

Challis, P ;

Clocchiatti, A ;

Diercks, A ;

Garnavich, PM ;

Gilliland, RL ;

Hogan, CJ ;

Jha, S ;

Kirshner, RP ;

Leibundgut, B ;

Phillips, MM ;

Reiss, D ;

Schmidt, BP ;

Schommer, RA ;

Smith, RC ;

Spyromilio, J ;

Stubbs, C ;

Suntzeff, NB ;

Tonry, J .

ASTRONOMICAL JOURNAL, 1998, 116 (03) :1009-1038

[28] The cosmological constant problem and quintessence [J].

Sahni, V .

CLASSICAL AND QUANTUM GRAVITY, 2002, 19 (13) :3435-3448

[29] The case for a positive cosmological Λ-term [J].

Sahni, V ;

Starobinsky, A .

INTERNATIONAL JOURNAL OF MODERN PHYSICS D, 2000, 9 (04) :373-443

[30] The holographic dark energy in non-flat Brans-Dicke cosmology [J].

Setare, M. R. .

PHYSICS LETTERS B, 2007, 644 (2-3) :99-103

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