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Exchange corrections in a low-temperature plasma
Umeå University, Faculty of Science and Technology, Department of Physics.
Umeå University, Faculty of Science and Technology, Department of Physics.
Umeå University, Faculty of Science and Technology, Department of Physics.
2015 (English)In: Physical Review E. Statistical, Nonlinear, and Soft Matter Physics, ISSN 1539-3755, E-ISSN 1550-2376, Vol. 92, no 1, 013104Article in journal (Refereed) Published
Abstract [en]

We have studied the exchange corrections to linear electrostatic wave propagation in a plasma using a quantum kinetic formalism. Specifically, we have considered the zero-temperature limit. In order to simplify the calculations we have focused on the long-wavelength limit, i.e., wavelengths much longer than the de Broglie wavelength. For the case of ion-acoustic waves we have calculated the exchange correction both to the damping rate and the real part of the frequency. For Langmuir waves the frequency shift due to exchange effects is found. Our results are compared with the frequency shifts deduced from commonly used exchange potentials which are computed from density-functional theory.

Place, publisher, year, edition, pages
American Physical Society , 2015. Vol. 92, no 1, 013104
National Category
Physical Sciences
Identifiers
URN: urn:nbn:se:umu:diva-106781DOI: 10.1103/PhysRevE.92.013104ISI: 000357863500006OAI: oai:DiVA.org:umu-106781DiVA: diva2:846224
Available from: 2015-08-14 Created: 2015-08-07 Last updated: 2017-12-04Bibliographically approved

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Ekman, RobinZamanian, JensBrodin, Gert
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