Transverse response of³He-A for the parallel plate geometry: Coupled fluid and orbital motion

Abstract

We have studied the transverse response of³He-A for the parallel plate geometry, employing the hydrodynamics of Graham. When particle-hole symmetry is employed to set certain reactive and dissipative coefficients to zero, the four modes have frequencies ω ^±_1,2 =−(s ^±_1,2 )ik², wheres ^±_1,2 =a_1,2±ib_1,2are constants andk is the wavevector magnitude. Away fromT _c the fluid and orbital motions are strongly coupled. Experimental generation of these modes is considered.