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arXiv 1010.4157hep-thgr-qcquant-ph
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黑洞熵发散与不确定原理

Black hole entropy divergence and the uncertainty principle

Ram Brustein, Judy Kupferman

摘要:

特胡夫特已经证明了黑洞的熵在视界处是发散的。视界附近的区域处于热态,因此熵与能量成线性关系,因此也发散。我们发现一个类似的相对论和非相对论场论的约化密度矩阵的能量发散,扩展以前的结果在量子力学。这种发散是由于空间的可观测区域和不可观测区域之间的无限尖锐的划分,它源于位置/动量不确定性关系,就像精确定域的量子粒子的动量涨落发散一样。我们表明,当可观察和不可观察的区域之间的边界是平滑的分歧驯服。我们认为,黑洞熵的发散也可以解释为位置/动量不确定性的结果,而胡夫特的砖墙以同样的方式驯服了发散,通过平滑边界。

英文摘要:

Black hole entropy has been shown by 't Hooft to diverge at the horizon. The region near the horizon is in a thermal state, so entropy is linear to energy which consequently also diverges. We find a similar divergence for the energy of the reduced density matrix of relativistic and non-relativistic field theories, extending previous results in quantum mechanics. This divergence is due to an infinitely sharp division between the observable and unobservable regions of space, and it stems from the position/momentum uncertainty relation in the same way that the momentum fluctuations of a precisely localized quantum particle diverge. We show that when the boundary between the observable and unobservable regions is smoothed the divergence is tamed. We argue that the divergence of black hole entropy can also be interpreted as a consequence of position/momentum uncertainty, and that 't Hooft's brick wall tames the divergence in the same way, by smoothing the boundary.

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