Cosmological dynamics of the tachyon with an inverse power-law potential

被引：183
|
作者：
Abramo, LR
Finelli, F
机构：
[1] Univ Sao Paulo, Inst Fis, BR-05315970 Sao Paulo, Brazil
[2] CNR, IASF, Ist Astrofis Spaziale & Fis Cosmica, Sez Bologna, I-40129 Bologna, Italy
来源：
PHYSICS LETTERS B | 2003年 / 575卷 / 3-4期
关键词：
D O I：
10.1016/j.physletb.2003.09.065
中图分类号：
P1 [天文学];
学科分类号：
0704 ;
摘要：
We investigate tachyon dynamics with an inverse power-law potential V (psi) proportional to psi(-n). We find global attractors of the dynamics leading to a dust behaviour for n > 2 and to an accelerating universe for 0 < n less than or equal to 2. We study linear cosmological perturbations and we show that metric fluctuations are constant on large scales in both cases. In presence of an additional perfect fluid, the tachyon with this potential behaves as dust or dark energy. (C) 2003 Published by Elsevier B.V.
引用
收藏
页码：165 / 171
页数：7
相关论文
共 50 条
  • [1] Cosmological Dynamics of the Tachyon with an Inverse Power-Law Potential
    L. Raul W. Abramo
    International Journal of Theoretical Physics, 2004, 43 : 563 - 573
  • [2] Cosmological dynamics of the tachyon with an inverse power-law potential
    Abramo, LRW
    INTERNATIONAL JOURNAL OF THEORETICAL PHYSICS, 2004, 43 (03) : 563 - 573
  • [3] Tachyon with an inverse power-law potential in a braneworld cosmology
    Bilic, Neven
    Domazet, Silvije
    Djordjevic, Goran S.
    CLASSICAL AND QUANTUM GRAVITY, 2017, 34 (16)
  • [4] Power-law inflation from the rolling tachyon
    Feinstein, A
    PHYSICAL REVIEW D, 2002, 66 (06)
  • [5] The Inflationary with Inverse Power-Law Potential in Tsallis Entropy
    Karabat, M. F.
    INTERNATIONAL JOURNAL OF THERMODYNAMICS, 2024, 27 (02) : 37 - 42
  • [6] Constraints on cosmological parameters in power-law cosmology
    Rani, Sarita
    Altaibayeva, A.
    Shahalam, M.
    Singh, J. K.
    Myrzakulov, R.
    JOURNAL OF COSMOLOGY AND ASTROPARTICLE PHYSICS, 2015, (03):
  • [7] Cosmological amplitudes in power-law FRW universe
    Fan, Bingchu
    Xianyu, Zhong-Zhi
    JOURNAL OF HIGH ENERGY PHYSICS, 2024, (12):
  • [8] On braneworld inverse power-law inflation
    Es-sobbahi, H.
    Nach, M.
    INTERNATIONAL JOURNAL OF MODERN PHYSICS A, 2018, 33 (10):
  • [9] Preinflationary Dynamics of Power-Law Potential in Loop Quantum Cosmology
    Shahalam, M.
    UNIVERSE, 2018, 4 (08):
  • [10] Intermediate and Power-law Inflation in the Tachyon Model with Constant Sound Speed
    Rashid, Narges
    ASTROPHYSICAL JOURNAL, 2022, 933 (01):
12345