Entropy Measurement in Strongly Coupled Complex Plasmas

Frank Wieben and Dietmar Block
Phys. Rev. Lett. 123, 225001 – Published 26 November 2019
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Abstract

The change in entropy of a system that is transferred between two states at different temperatures is measured in a two-dimensional plasma crystal experiment. One- and especially two-component dust clusters are confined in the plasma sheath and heated to different temperatures using laser manipulation. We find that entropies obtained from the phase space yield consistent results for, i.e., the heat capacity which shows excellent agreement with the Dulong-Petit law. The implications for the validity of basic thermodynamical principles in finite size complex (dusty) plasmas are discussed.

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  • Received 19 June 2019
  • Revised 9 October 2019

DOI:https://doi.org/10.1103/PhysRevLett.123.225001

© 2019 American Physical Society

Physics Subject Headings (PhySH)

Polymers & Soft MatterPlasma PhysicsStatistical Physics & Thermodynamics

Authors & Affiliations

Frank Wieben* and Dietmar Block

  • IEAP, Christian-Albrechts-Universität, D-24098 Kiel, Germany

  • *wieben@physik.uni-kiel.de

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Issue

Vol. 123, Iss. 22 — 29 November 2019

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