Stability of the aligned state of3He-A in a superflow

Abstract

The stability of the equilibrium orientation of 1 parallel or antiparallel to a counterflow is studied both dynamically and statically. In contrast to the recent work of Hall and Hook-who, we show, use incorrect dynamical equations-we find the equilibrium to be stable in the Ginzburg-Landau regime. At lower temperatures an instability should develop.