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arXiv 1502.07535hep-thgr-qchep-ph
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最小长度变形QM/QFT的额外维推广及其某些唯象结果

Extra-dimensional generalization of minimum-length deformed QM/QFT and some of its phenomenological consequences

Michael Maziashvili

摘要:

与3D情况相反,不同的方法来推导海森堡不确定性关系的引力修正不会导致唯一的结果,而额外的空间维度存在于理论中。我们建议对黑洞熵进行对数修正,这在弦论和圈量子引力中都已被证明在存在额外空间维度的情况下仍然存在,作为识别修改的Heisenberg-Weyl代数的切入点。然后,我们利用这种量子力学的一种特殊的希尔伯特空间表示,构造了相应的修正的场论,并解决了由此产生的一些唯象问题,明确指出了在第二量子化水平上产生的一些微妙之处。通过将场算符解到形变参量的一阶,定义自由粒子的修正波函数,讨论了黑洞蒸发的可能唯象意义.撇开在第二量子化水平上产生的修正,我们讨论了由于修正的传播子(对引力的反作用)对引力势的修正,并看到当黑洞质量接近量子引力尺度时,相应修正的Schwarzschild-Tangherlini时空显示出视界的消失和表面引力的消失。这一结果指出了零温黑洞残余物的存在。

英文摘要:

In contrast to the 3D case, different approaches for deriving the gravitational corrections to the Heisenberg uncertainty relation do not lead to the unique result whereas additional spatial dimensions are present in the theory. We suggest to take logarithmic corrections to the black hole entropy, which has recently been proved both in string theory and loop quantum gravity to persist in presence of additional spatial dimensions, as a point of entry for identifying the modified Heisenberg-Weyl algebra. We then use a particular Hilbert space representation for such a quantum mechanics to construct the correspondingly modified field theory and address some phenomenological issues following from it. Some subtleties arising at the second quantization level are clearly pointed out. Solving the field operator to the first order in deformation parameter and defining the modified wave function for a free particle, we discuss the possible phenomenological implications for the black hole evaporation. Putting aside modifications arising at the second quantization level, we address the corrections to the gravitational potential due to modified propagator (back reaction on gravity) and see that correspondingly modified Schwarzschild-Tangherlini space-time shows up the disappearance of the horizon and vanishing of surface gravity when black hole mass approaches the quantum gravity scale. This result points out to the existence of zero-temperature black hole remnants.

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