Parametric-Excitation Of The J=2+ Modes By Zero Sound In Superfluid He-3-B

TitleParametric-Excitation Of The J=2+ Modes By Zero Sound In Superfluid He-3-B
Publication TypeJournal Article
Year of Publication1991
AuthorsSauls, J. A., and McKenzie Ross H.
JournalPhysica B
Volume169
Issue1-4
Pagination170–176
Abstract{We discuss order-parameter collective modes in weakly inhomogenous states of superfluid He-3-B, i.e., states in which the scale of the inhomogeneities is considerably longer than the coherence length xi-0 = upsilon-(f)/2-pi-T(c) and the energy associated with the inhomogeneity is small compared to the condensation energy. The theory describes resonance phenomena between order-parameter modes and zero sound. We discuss two specific cases, both of which involve excitation of the J = 2+ modes via a parametric field that lifts the selection rule due to particle-hole symmetry. In the case of a static superflow the modes with J = 2+