Abstract
Correlations between delocalized Bloch electrons are the driving force behind key properties of solids as well as intriguing phase transitions [1]; to directly follow how many-body interactions affect intrinsic electron motion, sub-femtosecond (1 fs = 10-15 s) temporal resolution is desirable [2]. Multi-terahertz (THz) photon energies are perfectly matched to resonantly probe millielectronvolt (meV) correlation-induced excitations [3]. Yet, resolving the influence of correlations on the trajectories of delocalized Bloch electrons has remained an open challenge.
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