Eur. Phys. J. C (2014) 74: 2912
https://doi.org/10.1140/epjc/s10052-014-2912-5

Letter

Thoughts on entropic gravity in the Parikh–Wilczek tunneling model of Hawking radiation

¹ Department of Physics and Center for High Energy Physics, Chung Yuan Christian University, Chung Li, Taiwan
² Leung Center for Cosmology and Particle Astrophysics, National Taiwan University, Taipei 106, Taiwan

^* e-mail: steve.wen@gmail.com

Received: 20 December 2013
Accepted: 17 May 2014
Published online: 4 June 2014

Abstract

In this letter, we use the Parikh–Wilczek tunneling model of Hawking radiation to illustrate that a reformulation of Verlinde’s entropic gravity is needed to derive Newton’s law for a temperature-varying screen, required by the conservation of energy. Furthermore, the entropy stored in the holographic screen is shown to be additive and its temperature dependence can be obtained.