Description of a Many-Atom System in Terms of Coherent Boson States
R. Bonifacio, Dae M. Kim, Marlan O. Scully · Physical Review · 1969
The correlated motion of an $N$-spin system has been described in terms of the coherent states of a harmonic oscillator. We have shown that this description of the system provides us with the closest analog to the classical limit. The macroscopic dipole operator in the coherent-state representation is shown to obey the Bloch equation in which each of the three components is simultaneously well defined.