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Defect Formation in Quench-Cooled Superfluid Phase Transition

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arxiv cond-mat/9706038 v2 pith:NHAVFOKZ submitted 1997-06-05 cond-mat.stat-mech hep-ph

Defect Formation in Quench-Cooled Superfluid Phase Transition

V.M. Ruutu , V.B. Eltsov , M. Krusius , Yu.G. Makhlin , B. Placais , G.E. Volovik This is my paper
classification cond-mat.stat-mech hep-ph
keywords phaselinessuperfluidtransitionabsorptionbackblobscalculated
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We use neutron absorption in rotating 3He-B to heat locally a 10 micrometer-size volume into normal phase. When the heated region cools back in microseconds, vortex lines are formed. We record with NMR the number of lines as a function of superflow velocity and compare to the Kibble-Zurek theory of vortex-loop freeze-out from a random network of defects. The measurements confirm the calculated loop-size distribution and show that also the superfluid state itself forms as a patchwork of competing A and B phase blobs. This explains the A to B transition in supercooled neutron-irradiated 3He-A.

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