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arXiv 1507.07591gr-qc
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广义相对论的离散哈密顿量

Discrete Hamiltonian for General Relativity

Jonathan Ziprick, Jack Gegenberg

摘要:

从正则广义相对论的Ashtekar公式出发,导出了一个用(经典)圈引力变量表示的物理哈密顿量。这是通过在一个复杂的三维单元内固定引力场的规范来实现的,这样每个单元内的曲率和挠率就消失了。由此产生的理论是全息的,体动力学完全由细胞边界上的自由度捕获。通过现有方法可容易地获得量化。

英文摘要:

Beginning from the Ashtekar formulation of canonical general relativity, we derive a physical Hamiltonian written in terms of (classical) loop gravity variables. This is done by gauge-fixing the gravitational fields within a complex of three-dimensional cells such that curvature and torsion vanish within each cell. The resulting theory is holographic, with the bulk dynamics being captured completely by degrees of freedom living on cell boundaries. Quantization is readily obtainable by existing methods.

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