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

Fisher, Shaun and Skyba, Peter and Pickett, George and Suramlishvili, Nugzar (2012) Decay of persistent precessing domains in 3He-B at very low temperatures. Physical review B, 86 (2). ISSN 1098-0121

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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.

Item Type:
Journal Article
Journal or Publication Title:
Physical review B
Additional Information:
©2012 American Physical Society
Subjects:
ID Code:
63045
Deposited By:
Deposited On:
21 Mar 2013 13:50
Refereed?:
Yes
Published?:
Published
Last Modified:
24 Oct 2020 02:39