The paper “Decoherence from universal tomographic measurements“, co-authored by Dorje Brody and Rishindra Melanathuru, has been published this week in Physical Review Research (open access link here). In the paper, the effect of decoherence is analyzed by studying the evolution of Stratonovich-Weyl quasiprobability distributions on the state space of the system. It is shown that decoherence makes an arbitrary-given quasiprobability distribution manifestly positive, thus modeling the emergence of classicality in some sense. The decoherence timescale, the minimum time that quasiprobability distributions of every initial state of the system become non-negative, is shown to decrease in Hilbert-space dimension, and hence larger quantum systems decohere faster. Rishindra in a PhD student of Dorje at Imperial (via his honorary Professorship there). Figure 1 from the paper is shown below.