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arXiv 2310.08522hep-thgr-qc
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欧几里得路径积分是否总是等于热配分函数?

Is the Euclidean path integral always equal to the thermal partition function?

Moscow Institute of Physics and Technology(莫斯科物理技术学院);National Research Centre “Kurchatov Institute”(库尔恰托夫国家研究中心)

Dmitrii Diakonov

AI总结:

研究证明欧几里得路径积分与热配分函数在特定条件下不相等,并提出新方法使二者在非紧致空间中相等。

摘要:

欧几里得路径积分与热(canonical)配分函数在弯曲的静态时空中的比较。证明如果空间截面是非紧致的且没有Killing视界,这两个量的对数仅相差一个与反温度成比例的项,该项来源于真空能量。当空间截面被Killing视界所包围时,欧几里得路径积分不等于热配分函数。证明了欧几里得路径积分的表达式取决于先积分坐标还是动量:在前者情况下,欧几里得路径积分依赖于模式的散射相移,并且是紫外发散的;在后者情况下,它是一个总导数,并在视界处发散。此外,我们证明了存在三种不同的能量定义,而对欧几里得路径积分关于反温度的导数不给出这三种能量类型的任何值。我们还提出了一种新的计算欧几里得路径积分的方法,该方法在非紧致空间(有或无Killing视界)中正确地使欧几里得路径积分与热配分函数相等。

英文摘要:

The Euclidean path integral is compared to the thermal (canonical) partition function in curved static space-times. It is shown that if spatial sections are non-compact and there is no Killing horizon, the logarithms of these two quantities differ only by a term proportional to the inverse temperature, that arises from the vacuum energy. When spatial sections are bordered by Killing horizons the Euclidean path integral is not equal to the thermal partition function. It is shown that the expression for the Euclidean path integral depends on which integral is taken first: over coordinates or over momenta. In the first case the Euclidean path integral depends on the scattering phase shift of the mode and it is UV diverge. In the second case it is the total derivative and diverge on the horizon. Furthermore we demonstrate that there are three different definitions of the energy, and the derivative with respect to the inverse temperature of the Euclidean path integral does not give the value of any of these three types of energy. We also propose the new method of computation of the Euclidean path integral that gives the correct equality between the Euclidean path integral and thermal partition function for non-compact spaces with and without Killing horizon.

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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