We employ a weak measurement approach to demonstrate the very existence of the photoexcited interband superposition states in intrinsic graphene. We propose an optical two-beam setup where such measurements are possible and derive an explicit formula for the differential optical absorption that contains a signature of such states. We provide an interpretation of our results in terms of a non-Markovian weak measurement formalism applied to the pseudospin degree of freedom coupled with an electromagnetic wave.
@article{arxiv.1703.02280,
title = {Weak measurement of quantum superposition states in graphene},
author = {Maxim Trushin and Johannes Bülte and Wolfgang Belzig},
journal= {arXiv preprint arXiv:1703.02280},
year = {2017}
}