Benchmarking quantum phase-space methods for near-resonant light propagation

We study the dynamics of light interacting with a near-resonant atomic medium using the truncated Wigner and positive P phase-space representations.

The atomic degrees of freedom are described using the Jordan-Schwinger mapping.

The dynamics is first analyzed under unitary evolution and subsequently in the presence of an optical reservoir.

While both approaches capture the main features of the light-matter dynamics, we find that the truncated Wigner approximation exhibits noticeable deviations for stronger interaction strengths and when reservoir-induced noise becomes significant.