Multiparticle boson states, proposed recently for "independently" emitted p
ions in heavy-ion collisions, are reconsidered in standard second quantized
formalism and shown to emerge from a simplistic chaotic current dynamics.
Compact equations relate the density operator, the generating functional of
multiparticle counts, and the correlator of the external current to each o
ther. "Bose-Einstein condensation" is related to the external pulse. A quan
tum master equation is advocated for future Monte Carlo simulations.