Dissipation near the Critical Point of a Two-Dimensional Superfluid

作者：Bernardo A. Huberman, Robert J. Myerson, Sebastian Doniach · 发表于：Physical Review Letters · 年份：1978 · DOI：10.1103/physrevlett.40.780 · 被引用次数：73 · 研究领域：Quantum, superfluid, helium dynamics、Physics of Superconductivity and Magnetism、Cold Atom Physics and Bose-Einstein Condensates

We show that in a nonequilibrium, two-dimensional superfluid near the critical point, the energy for dissipative fluctuations is greatly reduced as a result of screening by the gas of bound vortex pairs, leading to an enhanced decay of the superfluid velocity. We also show that the superfluid density is reduced by a velocity-dependent amount as ${T}_{c}$ is approached from below.