Computer simulation of spin super radiance

摘要

Coherent effects in polarized systems of nuclear or electron spins using a microscopic model are studied, but not the Bloch equations. It is shown that the spin system in a resonance circuit can emit a coherent superradiant pulse when the system is initially in an essentially unstable state, at a time much shorter than the spin dephasing time T$-2$/ when the coupling of the system with the circuit is sufficiently strong, and at the time longer than T$-2$/ when this coupling is weak. The important role if dipole spin-spin interactions is elucidated.