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Decay of persistent precessing domains in 3He-B at very low temperatures

S. N. Fisher, G. R. Pickett, P. Skyba, and N. Suramlishvili
Phys. Rev. B 86, 024506 – Published 6 July 2012

Abstract

The B phase of superfluid 3He can support regions of extremely long-lived coherent spin precession at ultralow temperatures, known as persistent precessing domains (PPD). The domains have been described in terms of a Bose-Einstein condensate of magnons and in terms of Q balls in field theory. The domains form in a magnetic field minimum along the vertical axis of a cylindrical cell. When far from the ends of the cell, the PPD lifetime grows exponentially on decreasing temperature. When the PPD is close to the horizontal end wall of the cell, an extra surface dissipation mechanism dominates at low temperatures. We present measurements of the PPD generated at various locations in the cell over a broad range of temperatures below 0.3 TC. We compare the measured properties with theoretical expectations for spin-wave modes. We present model calculations of different dissipation mechanisms and we compare these to the measured lifetimes.

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  • Received 23 May 2012

DOI:https://doi.org/10.1103/PhysRevB.86.024506

©2012 American Physical Society

Authors & Affiliations

S. N. Fisher1, G. R. Pickett1, P. Skyba1,2, and N. Suramlishvili3

  • 1Department of Physics, Lancaster University, Lancaster, LA1 4YB, United Kingdom
  • 2Center of Low Temperature Physics, Institute of Experimental Physics, Slovak Academy of Sciences, Watsonova 47, 04001 Košice, Slovakia
  • 3School of Mathematics and Statistics, Newcastle University, Newcastle NE1 7RU, United Kingdom (also Andronikashvili Institute of Physics, Tbilisi, 0177, Georgia)

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Issue

Vol. 86, Iss. 2 — 1 July 2012

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