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arXiv 0910.0839gr-qcastro-ph.COhep-th
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关于引力本质的对话

A Dialogue on the Nature of Gravity

T. Padmanabhan

摘要:

我描述的概念和数学基础的方法,描述重力作为一个新兴的现象。结合等效原理和广义协方差原理以及由相对于局部惯性系加速的观测者所感知的局部Rindler视界的已知性质,可以证明在任何双态不变量理论中描述引力的场方程可以给出热力学的重新解释。这一事实反过来又使我们有可能通过最大化一个适当定义的熵泛函,而不用度规张量作为动力学变量来推导引力场方程。这种方法综合了量子理论、热力学和引力的概念,从而对引力的本质产生了新的看法。这里以对话的形式介绍说明,从而解决几个经常被问到的问题。

英文摘要:

I describe the conceptual and mathematical basis of an approach which describes gravity as an emergent phenomenon. Combining principle of equivalence and principle of general covariance with known properties of local Rindler horizons, perceived by observers accelerated with respect to local inertial frames, one can prove that the field equations describing gravity in any diffeomorphism invariant theory can be given a thermodynamic re-interpretation. This fact, in turn, leads us to the possibility of deriving the field equations of gravity by maximising a suitably defined entropy functional, without using the metric tensor as a dynamical variable. The approach synthesises concepts from quantum theory, thermodynamics and gravity leading to a fresh perspective on the nature of gravity. The description is presented here in the form of a dialogue, thereby addressing several frequently-asked-questions.

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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