Phys. Rev. Lett. 96, 205301 (2006) [4 pages]Probing “Cosmological” Defects in Superfluid 3He-B with a Vibrating-Wire ResonatorReceived 15 February 2006; published 22 May 2006 We report on the observation of an anomalously high damping measured by a vibrating-wire resonator (VWR) immersed into superfluid 3He-B at ultralow temperatures. The observed dissipation is orders of magnitude above that corresponding to friction with the dilute normal fraction and superfluid vortices. A clear pinning behavior is also observed, as well as a strong magnetic field dependence. Our analysis points to the interaction of the VWR with a planar topological defect, analogue to cosmological vacua defects, as proposed by Salomaa and Volovik. © 2006 The American Physical Society URL:
http://link.aps.org/doi/10.1103/PhysRevLett.96.205301
DOI:
10.1103/PhysRevLett.96.205301
PACS:
67.57.Fg, 05.45.Yv, 11.27.+d
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