  We study the dynamics of the spin and cavity field of the Tavis-Cummings
model using quasi-probability distribution functions and second order coherence
function, respectively. The effects of (non)-Markovian noise are considered.
The relationship between the evolution of the cavity photon number, spin
excitation, and atomic inversion under different quantum channels is observed.
The equal-time second-order coherence function is used to study the
sub-Poissonian behavior of light, and is compared with the two-time
second-order coherence function in order to highlight the (anti)-bunching
properties of the cavity radiation.
