Katsuhiko Nagai

A polar state in a slab as a soluble model of p-wave Fermi superfluid in finite geometry

Modele de leffet dimensionnel, avec un parametre dordre perpendiculaire a la paroi, de forme essentiellement identique a celle du reseau solitons du polyacetylene, representant une solution analytique autocoherente de lequation de la bande interdite

A-B Transition of Superfluid 3He under Magnetic Field at Low Pressures

Etude par lapproximation de couplage faible. Calcul de lenergie libre de la phase B et comparaison a letat planaire; bon accord du diagramme detat calcule avec les resultats experimentaux disponibles. Mise en evidence dune transition dordre 1 au-dessous et dordre 2 au-dessus du point tricritique qui depend du parametre de Landau

Shear viscosity of the B phase of superfluid3He

AbstractThe shear viscosity η(T) in the Balian-Werthamer (BW) state of superfluid3He is calculated variationally throughout the region 0≤t≤ 1(t=T/Tc) from the transport equation for Bogoliubov quasiparticles. Coherence factors are treated exactly in the calculation of the collision integral. The numerical result forn

Cusp at ω= 2 Δ0 (T) in Ultrasound Dispersion Relation of Low Temperature Superfluid 3He-A

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Nonanalytic properties and normal current of superfluid3He-A atT=0 K

n=ηs= ηs(T)/ηn(Tc) agree very well with experiment in the range 0.8≤t≤1.0. Analytic expressionsn

Magnetic collective excitations in the B phase of superfluid He-3

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