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arXiv 0812.4742gr-qc
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具有宇宙学常数的拓扑质量引力的正则结构

Canonical structure of topologically massive gravity with a cosmological constant

M. Blagojević, B. Cvetković

摘要:

利用Dirac方法的全幂方法研究了具有宇宙学常数的三维拓扑质量引力系统的正则结构。结果表明,每个时空点的物理相空间维数为2,对应于一个拉格朗日自由度。AdS渐近区域的分析揭示了一个显着的关系,三维引力挠:在零挠的极限,两个理论的守恒电荷和渐近对称性变得相同。

英文摘要:

We study the canonical structure of three-dimensional topologically massive gravity with a cosmological constant, using the full power of Dirac's method for constrained Hamiltonian systems. It is found that the dimension of the physical phase space is two per spacetime point, which corresponds to a single Lagrangian degree of freedom. The analysis of the AdS asymptotic region reveals a remarkable relation to 3D gravity with torsion: in the limit of vanishing torsion, the conserved charges and asymptotic symmetries of the two theories become identical.

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