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排序方式: 共有30条查询结果,搜索用时 15 毫秒
1.
该文计算了四元数体上的矩阵空间中的一些典型积分.由这些积分,可以得到相应的四元数体上的双曲矩阵空间的体积,这对于相关核函数的计算是有帮助的.  相似文献   
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高长军  沈有根 《中国物理》2003,12(4):371-376
We present the classical solution of Lagrange equations for the black hole with a global monopole or with a cosmic string. Then we obtain the wavefunction of the space-time by solving the Wheeler-De Witt equation. De Broglie-Bohm interpretation applied to the wavefunction gives the quantum solution of the space-time. In the end, the quantum effect on Hawking radiation is studied.  相似文献   
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高长军  沈有根 《中国物理》2003,12(11):1317-1324
The wormhole equations are presented in the presence of tachyon field. Specializing at some values of ω(the ratio of pressure to energy density), we find a family of classical and quantum wormhole solutions.  相似文献   
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陈驰一  沈有根 《中国物理快报》2004,21(11):2320-2322
The role of vacuum energy or cosmological constant in cosmology is discussed in a kind of nontrivial higherdimensional model. Under the framework of Einstein‘s gravity, we obtain the corresponding equations of motion and find that the cosmological constant and vacuum energy in the full regime does not drive its acceleration, but decelerates the expansion of the universe. The dimension of space is required to be n = 3 if we regard vacuum energy or cosmological constant as the candidate to drive the accelerated expansion of the universe.  相似文献   
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We present the classical solution of Lagrange equations for the Resissner-Nordstrom black hole with a global monopole in the background of de Sitter space-time.Then we obtain the wavefunction of the space-time by solving the Wheeler-De Witt equation.De Broglie-Bohm interpretation applied to the wavefunction gives the quantum solution of the space-time.Finally,the quantum effect on hawking radiation is studied.  相似文献   
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高长军  沈有根 《中国物理》2002,11(9):890-893
Using the improved brick-wall model, we have calculated the first quantum correction to the entropy of non-static black holes, Vaidya-Bonner black holes, due to the gravitational, electro-magnetic and neutrino fields. The result shows that both bosonic entropy and fermionic entropy are exactly proportional to the area of the event horizon. Thus, the entropy-area law still holds in such a non-static case.  相似文献   
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We calculate the entropy of the fermion field in the NUT-Kerr-Newman black holes in the background of the de Sitter spacetime by using the improved brick-wall method and the membrane model.Here the Euler characteristic of the black holes is over two.The results show that,as the cut-off is properly chosen,the entropy in the black hole satisfies the Bekenstein-Hawking area law.  相似文献   
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Using the membrane model which is based on brick wall model, we calculated the free energy and entropy of Garfinkle-Horne dilatonic black hole due to arbitrary spin fields. The result shows that the entropy of scalar field and the entropy of Fermionic field have similar formulas. There is only a coefficient between them.  相似文献   
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李翔  沈有根 《中国物理快报》2006,23(5):1103-1105
Quantum gravity can modify the usual energy-momentum dispersion relation. We provide evidence for the argument that the modified dispersion relation is constrained by the black hole thermodynamics, for consistency of quantum gravity.  相似文献   
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