On the quantum master equation for Bogoliubov-BCS quasiparticles

The quantum master equation is introduced for the density matrix representing Bogoliubov-BCS quasiparticles. A constraint to relate the loss and gain factors is taken into account to preserve the form of the density matrix. Such an equation can be reduced to the semiclassical equation, and can be extended for the coexistence of different order parameters.