BLACK-HOLES

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Circular Loop Equation of a Cosmic String in Gauss-Bonnet-de Sitter Spacetimes
《Chinese Physics Letters》2008年第3期1160-1163,共4页程红波 刘云旗 
Supported by the National Natural Science Foundation of China under Grant No 10333020, and the Shanghai Municipal Science and Technology Commission under Grant No 04dz05905.
We perform the analysis of evolution of cosmic string loops in the background of Gauss-Bonnet-de Sitter. The equation of motion of cosmic string loops in this spacetime is derived. Having solved the equation numerical...
关键词：BLACK-HOLES 
Lower Bounds on Negative Energy Densities for the Scalar Field in Flat Spacetime
《Chinese Physics Letters》2006年第1期25-28,共4页舒维星 余洪伟 任中洲 吴普训 李飞 
Supported by the National Natural Science Foundation of China under Grant Nos 10375023, 10575035 and 10125521, the Program for NCET （No 04-0784）, the Key Project of Chinese Ministry of Education （No 205110）, and the National Major State Basic Research and Development Programme of China （G2000077400）.
We obtain a lower bound on the spacetime-weighted average of the energy density for the scalar field in four-dimensional flat spacetime. The bound takes the form of a quantum inequality. The inequality does not rely o...
关键词：QUANTUM INEQUALITIES BLACK-HOLES DIRAC FIELD WARP DRIVE STATES TIME 
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