Entropy 2012, 14(4), 736-741; doi:10.3390/e14040736
Letter

Radiation Entropy Bound from the Second Law of Thermodynamics

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Received: 14 February 2012; in revised form: 22 March 2012 / Accepted: 6 April 2012 / Published: 13 April 2012
This is an open access article distributed under the Creative Commons Attribution License which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited.
Abstract: It has been suggested heuristically by Unruh and Wald, and independently by Page, that at given energy and volume, thermal radiation has the largest entropy. The suggestion leads to the corresponding universal bound on entropy of physical systems. Using a gedanken experiment we show that the bound follows from the Second Law of Thermodynamics if the CPT symmetry is assumed and a general condition on matter holds. The experiment suggests that a wide class of Lorentz invariant local quantum field theories obeys a bound on the density of states.
Keywords: entropy; Second Law of Thermodynamics; CPT
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MDPI and ACS Style

Fouxon, I. Radiation Entropy Bound from the Second Law of Thermodynamics. Entropy 2012, 14, 736-741.

AMA Style

Fouxon I. Radiation Entropy Bound from the Second Law of Thermodynamics. Entropy. 2012; 14(4):736-741.

Chicago/Turabian Style

Fouxon, Itzhak. 2012. "Radiation Entropy Bound from the Second Law of Thermodynamics." Entropy 14, no. 4: 736-741.

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