High-capacity, single-photon-level warm atomic memory storing up to 120 spatial modes

We report first experimental demonstration of a warm atomic memory operating at a single-photon-level, capable to store and retrieve up to 120 spatial modes. We present unambiguous spatial g⁽²⁾(θ_S,θ_AS) cross-correlations between heralding and retrieved photons stored up to several microseconds.