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arXiv 1402.3687hep-th
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变分原理与三维平坦空间Einstein引力的1点函数

Variational principle and 1-point functions in 3-dimensional flat space Einstein gravity

Stephane Detournay, Daniel Grumiller, Friedrich Scholler, Joan Simon

摘要:

通过在体作用量中加入一半的Gibbons-Hawking-York边界项,给出了三维平坦空间爱因斯坦引力的一个定义良好的变分原理.我们检查0点函数,恢复与平坦空间宇宙学热力学的一致性。然后,我们应用我们的结果来计算1点函数在平坦空间爱因斯坦引力的真空和所有平坦空间宇宙学。所得结果与正则分析得到的零模电荷的结果一致。

英文摘要:

We provide a well-defined variational principle for 3-dimensional flat space Einstein gravity by adding one half of the Gibbons-Hawking-York boundary term to the bulk action. We check the 0-point function, recovering consistency with thermodynamics of flat space cosmologies. We then apply our result to calculate the 1-point functions in flat space Einstein gravity for the vacuum and all flat space cosmologies. The results are compatible with the ones for the zero mode charges obtained by canonical analysis.

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