Next Article in Journal
The Decoherence of the Electron Spin and Meta-Stability of 13C Nuclear Spins in Diamond
Next Article in Special Issue
State Operator Correspondence and Entanglement in AdS2/CFT1
Previous Article in Journal
Holographic Dark Information Energy
Previous Article in Special Issue
Static Isolated Horizons: SU(2) Invariant Phase Space, Quantization, and Black Hole Entropy

Is Gravity an Entropic Force?

Unit for HPS & Centre for Time, SOPHI, University of Sydney, Sydney, NSW 2006, Australia
Entropy 2011, 13(5), 936-948;
Received: 2 March 2011 / Revised: 7 April 2011 / Accepted: 24 April 2011 / Published: 28 April 2011
(This article belongs to the Special Issue Black Hole Thermodynamics)
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. View Full-Text
Keywords: gravity; thermodynamics; entropic force; discrete spacetime gravity; thermodynamics; entropic force; discrete spacetime
MDPI and ACS Style

Gao, S. Is Gravity an Entropic Force? Entropy 2011, 13, 936-948.

AMA Style

Gao S. Is Gravity an Entropic Force? Entropy. 2011; 13(5):936-948.

Chicago/Turabian Style

Gao, Shan. 2011. "Is Gravity an Entropic Force?" Entropy 13, no. 5: 936-948.

Find Other Styles

Article Access Map by Country/Region

Only visits after 24 November 2015 are recorded.
Back to TopTop