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arXiv 0804.2182hep-thgr-qcquant-ph
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相对熵与Bekenstein界

Relative entropy and the Bekenstein bound

H. Casini

摘要:

在Marolf等人以前的工作的基础上,我们将量子场论和统计力学中的一些精确结果与贝肯斯坦熵的普遍界联系起来。具体地说,我们考虑真空和另一个状态之间的相对熵,都减少到一个局部区域。我们提出,在适当的解释下,在这种情况下,相对熵的正性构成了平坦空间中界的一个定义良好的陈述。我们表明,这个版本自然产生的约束从广义第二定律时,考虑到量子效应的原始推导。在这个公式中,界限自动成立,特别是它不会受到物种扩散问题的影响。结果表明,虽然在经典水平上的限制是相关的,它不引入新的物理约束半经典。

英文摘要:

Elaborating on a previous work by Marolf et al, we relate some exact results in quantum field theory and statistical mechanics to the Bekenstein universal bound on entropy. Specifically, we consider the relative entropy between the vacuum and another state, both reduced to a local region. We propose that, with the adequate interpretation, the positivity of the relative entropy in this case constitutes a well defined statement of the bound in flat space. We show that this version arises naturally from the original derivation of the bound from the generalized second law when quantum effects are taken into account. In this formulation the bound holds automatically, and in particular it does not suffer from the proliferation of the species problem. The results suggest that while the bound is relevant at the classical level, it does not introduce new physical constraints semiclassically.

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