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arXiv 1207.7101hep-thgr-qc
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二维因果钻石的基态

A Ground State for the Causal Diamond in 2 Dimensions

Niayesh Afshordi, Michel Buck, Fay Dowker, David Rideout, Rafael D. Sorkin, Yasaman K. Yazdi

摘要:

我们将最近提出的关于全局双曲时空中量子场的特殊基态的理论应用于二维Minkowski空间中因果菱形中的自由无质量标量场。我们调查的两个限制,其中的Wightman函数进行评估(i)位于钻石的中心(即远离边界)的点对,和(ii)的点对接近左或右角。我们发现,在中心,恢复闵可夫斯基真空态,具有一定的红外截止值。有趣的是,基态并不是钻石角落里的林德勒真空,正如人们所预期的那样,而是在那个角落里有一个静态镜子的平坦空间的真空。我们证实了这些结果,通过数值计算Wightman函数的无质量标量场的因果集对应的连续因果钻石。

英文摘要:

We apply a recent proposal for a distinguished ground state of a quantum field in a globally hyperbolic spacetime to the free massless scalar field in a causal diamond in two-dimensional Minkowski space. We investigate the two limits in which the Wightman function is evaluated (i) for pairs of points that lie in the centre of the diamond (i.e. far from the boundaries), and (ii) for pairs of points that are close to the left or right corner. We find that in the centre, the Minkowski vacuum state is recovered, with a definite value of the infrared cutoff. Interestingly, the ground state is not the Rindler vacuum in the corner of the diamond, as might have been expected, but is instead the vacuum of a flat space in the presence of a static mirror on that corner. We confirm these results by numerically evaluating the Wightman function of a massless scalar field on a causal set corresponding to the continuum causal diamond.

机构、总结、中文摘要均由AI分析而来,可能存在错误,请以论文正文为准。

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