ON THE THEORY OF SUPERFLUID FERMI-LIQUID WITH SPIN-TRIPLET PAIRING INA MAGNETIC-FIELD

The Fermi-liquid approach generalized to superfluid systems is used to derive general formulas for the normal and abnormal distribution func tions (DF) for quasiparticles of a superfluid Fermi liquid (SFL) consi sting of electrically neutral fermions with spin-triplet pairing (the spin of a pair s=1, the orbital angular momentum I of the pair being a n arbitrary odd number) in a static uniform magnetic field, taking int o account the Landau spin-exchange Fermi-liquid interaction at tempera tures 0<T<T-c (T-c is the temperature of phase transition from the nor mal to the superfluid state). In deriving the DF, the explicit form of the energy functional (EF) for SFL is not used. A system of coupled e quations is obtained for the order parameter, energy of quasiparticles , and effective magnetic field for the SFL under investigation in the case of an EF quadratic in DF, The obtained DF and the system of equat ions are applicable for describing both unitary and nonunitary phases of superfluid He-3 in a magnetic field, e.g., for determining the magn etization and magnetic susceptibility of these phases. (C) 1998 Americ an Institute of Physics.