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RESEARCH PRODUCT
Vortex mutual friction in rotating superfluid 3He
Antti ManninenJ. R. HookH. E. HallJ. B. Cooksubject
PhysicsCondensed matter physicsmedia_common.quotation_subjectPhase (waves)General Physics and AstronomyEquations of motionInertiaRotationVortexSuperfluidityClassical mechanicsBound stateCooper pairmedia_commondescription
The Manchester rotating cryostat has been used to measure the longitudinal and transverse coefficients of vortex mutual friction in the A and B phases of superfluid 3He. In the B phase the dominant contribution to the mutual friction is scattering of excitations off occupied bound states in the vortex core. The A phase results are explained quantitatively by assuming that doubly quantised continuous vortices are created with a dynamics determined by the equation of motion of the orbital vector I; the measurements enable us to put an upper limit on the orbital inertia of less than 0.01h{stroke} per Cooper pair. History-dependent textural effects which had to be overcome in order to make meaningful measurements in the A phase are explained by noting that for a given rotation direction the most stable vortices can be formed more easily from one direction of uniform l texture than the other.
| year | journal | country | edition | language |
|---|---|---|---|---|
| 1996-06-01 |