引力是熵力吗？
Is Gravity an Entropic Force?
摘要：
引力和热力学之间的显著联系似乎暗示引力不是基本的，而是突现的，特别是，正如Verlinde所建议的，引力可能是熵力。在这篇文章中，我们将讨论引力作为熵力的观点是有争议的。结果表明，在Verlinde的例子中，引力和熵力之间没有令人信服的类比。全息屏和测试粒子都不能满足热力学系统中熵力存在的所有条件。此外，我们表明，屏幕的熵增加不是由于其统计趋势增加熵的存在所需要的熵力，但实际上是由重力。因此，Verlinde关于引力的熵起源的论证是有问题的。此外，我们认为，时空最小尺寸的存在，以及量子理论中的海森堡不确定原理，可能意味着作为时空几何性质的引力的基本存在。这可能进一步支持引力不是熵力的结论。
英文摘要：
The remarkable connections between gravity and thermodynamics seem to imply that gravity is not fundamental but emergent, and in particular, as Verlinde suggested, gravity is probably an entropic force. In this paper, we will argue that the idea of gravity as an entropic force is debatable. It is shown that there is no convincing analogy between gravity and entropic force in Verlinde's example. Neither holographic screen nor test particle satisfies all requirements for the existence of entropic force in a thermodynamics system. Furthermore, we show that the entropy increase of the screen is not caused by its statistical tendency to increase entropy as required by the existence of entropic force, but in fact caused by gravity. Therefore, Verlinde's argument for the entropic origin of gravity is problematic. In addition, we argue that the existence of a minimum size of spacetime, together with the Heisenberg uncertainty principle in quantum theory, may imply the fundamental existence of gravity as a geometric property of spacetime. This may provide a further support for the conclusion that gravity is not an entropic force.
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