Extra Dimension;
Einstein Equation;
Weyl Tensor;
Friedmann Equation;
Junction Condition;
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摘要:
We show the four-dimensional Newton’s constant obtained naturally from five-dimensional brane world with a tinily sloping extra dimension, which is independent of the bulk Weyl tensor. The corresponding universe is stiff fluid dominated when the slope of extra dimension is very small. Otherwise, the universe may be undergoing a self-acceleration at present epoch and have a decelerated phase in very recent past.
机构:
Shanghai Univ, Coll Sci, Shanghai 200436, Peoples R ChinaShanghai Univ, Coll Sci, Shanghai 200436, Peoples R China
Zhu, Shu
Wu, Shao-Feng
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机构:
Shanghai Univ, Coll Sci, Shanghai 200436, Peoples R ChinaShanghai Univ, Coll Sci, Shanghai 200436, Peoples R China
Wu, Shao-Feng
Zhang, Peng-Ming
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机构:
Ctr Theoret Nucl Phys, Natl Lab Heavy Ion Accelerator, Lanzhou 730000, Peoples R China
Inst Modern Phys, Lanzhou 730000, Peoples R ChinaShanghai Univ, Coll Sci, Shanghai 200436, Peoples R China
Zhang, Peng-Ming
Yang, Guo-Hong
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机构:
Shanghai Univ, Coll Sci, Shanghai 200436, Peoples R ChinaShanghai Univ, Coll Sci, Shanghai 200436, Peoples R China
机构:
Univ Roma Tre, Via Vasca Navale 84, I-00146 Rome, Italy
INFN Sez Roma Tre, Via Vasca Navale 84, I-00146 Rome, ItalyUniv Roma Tre, Via Vasca Navale 84, I-00146 Rome, Italy
Romoli, Matteo
Zanusso, Omar
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机构:
Univ Pisa, Largo Bruno Pontecorvo 3, I-56127 Pisa, Italy
INFN Sez Pisa, Largo Bruno Pontecorvo 3, I-56127 Pisa, ItalyUniv Roma Tre, Via Vasca Navale 84, I-00146 Rome, Italy