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

Lookup NU author(s): Dr Nugzar Suramlishvili

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Abstract

The B phase of superfluid He-3 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 T-C. 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.

Publication metadata

Author(s): Fisher SN, Pickett GR, Skyba P, Suramlishvili N

Publication type: Article

Publication status: Published

Journal: Physical Review B

Year: 2012

Volume: 86

Issue: 2

Print publication date: 06/07/2012

ISSN (print): 1098-0121

ISSN (electronic): 1550-235X

Publisher: American Physical Society

URL: http://dx.doi.org/10.1103/PhysRevB.86.024506

DOI: 10.1103/PhysRevB.86.024506

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