Time and space resolved observation of spin-charge separation

In this collaboration with the experimental group of Immanuel Bloch and Christian Gross (MPQ), spin-charge separation was observed for the first time in time and space domains. The experiments realized a regime at high energies, beyond the Luttinger liquid paradigm. As first predicted by Kollath and co-workers [PRL 95, 176401 (2005)] at zero temperature, clear signatures of spin-charge separation remain visible in this regime. Here we demonstrate clear signatures of spin-charge separation even at elevated temperatures. Our work paves the way for future studies of spin-charge separation in higher dimensions.