Quantum theory of acoustic superradiance
C. Leonardi · Physical review. B, Solid state · 1977
We develop a quantum description of acoustic superradiance for spins interacting with longitudinal phonons in a one-dimensional system. The analysis is performed by looking at the second-order Heisenberg equations of motion for the phonon population in each mode. These equations are solved in the superradiant case and the results are compared with those obtained in the theory of avalanche relaxation previously developed.