Entropy of plasmas described with regularized κ distributions

H. Fichtner, K. Scherer, M. Lazar, H. J. Fahr, and Z. Vörös
Phys. Rev. E 98, 053205 – Published 13 November 2018

Abstract

In classical thermodynamics the entropy is an extensive quantity, i.e., the sum of the entropies of two subsystems in equilibrium with each other is equal to the entropy of the full system consisting of the two subsystems. The extensitivity of entropy has been questioned in the context of a theoretical foundation for the so-called κ distributions, which describe plasma constituents with power-law velocity distributions. We demonstrate here, by employing the recently introduced regularized κ distributions, that entropy can be defined as an extensive quantity even for such power-law-like distributions that truncate exponentially.

  • Figure
  • Figure
  • Received 19 July 2018

DOI:https://doi.org/10.1103/PhysRevE.98.053205

©2018 American Physical Society

Physics Subject Headings (PhySH)

Plasma Physics

Authors & Affiliations

H. Fichtner, K. Scherer, and M. Lazar

  • Institut für Theoretische Physik IV, Ruhr-Universität Bochum, 44780 Bochum, Germany

H. J. Fahr

  • Argelander Institut für Astronomie, Universität Bonn, Auf dem Hügel 71, 53121 Bonn, Germany

Z. Vörös

  • Space Research Institute, Austrian Academy of Sciences, Schmiedlstr. 6, 8042 Graz, Austria

Article Text (Subscription Required)

Click to Expand

References (Subscription Required)

Click to Expand
Issue

Vol. 98, Iss. 5 — November 2018

Reuse & Permissions
Access Options
Author publication services for translation and copyediting assistance advertisement

Authorization Required


×
×

Images

×

Sign up to receive regular email alerts from Physical Review E

Log In

Cancel
×

Search


Article Lookup

Paste a citation or DOI

Enter a citation
×