Is Diffusion Anomalous in Two-Dimensional Yukawa Liquids?

Journal Article · Fri Nov 06 00:00:00 EST 2009 · Physical Review Letters

DOI:https://doi.org/10.1103/PHYSREVLETT.103.195001· OSTI ID:21370813

Ott, T; Bonitz, M ^[1]

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1. Christian-Albrechts-Universitaet zu Kiel, Institut fuer Theoretische Physik und Astrophysik, Leibnizstrasse 15, 24098 Kiel (Germany)

There have recently been many predictions of 'superdiffusion' in two-dimensional strongly coupled Yukawa systems, both by computer simulations and in dusty plasma experiments, with substantially varying diffusion exponents. Here we show that the results crucially depend on the strength of dissipation and the time instant of the measurement. For sufficiently large friction even subdiffusion is possible. However, there are strong indications that, in the long-time limit, anomalous diffusion vanishes and the system returns to normal diffusion, for dissipative as well as for frictionless systems.

• OSTI ID: 21370813
• Journal Information: Physical Review Letters, Vol. 103, Issue 19; Other Information: DOI: 10.1103/PhysRevLett.103.195001; (c) 2009 The American Physical Society; ISSN 0031-9007
• Country of Publication: United States
• Language: English

Related Subjects

71 CLASSICAL AND QUANTUM MECHANICS
GENERAL PHYSICS
70 PLASMA PHYSICS AND FUSION TECHNOLOGY
COMPUTERIZED SIMULATION
DIFFUSION
FRICTION
LIQUIDS
PLASMA
TWO-DIMENSIONAL CALCULATIONS
FLUIDS
SIMULATION