Superballistic flow of viscous electron fluid through graphene constrictions

R. Krishna Kumar, D. A. Bandurin, F. M.D. Pellegrino, Y. Cao, A. Principi, H. Guo, G. H. Auton, M. Ben Shalom, L. A. Ponomarenko, G. Falkovich, K. Watanabe, T. Taniguchi, I. V. Grigorieva, L. S. Levitov, M. Polini, A. K. Geim^*

^*Corresponding author for this work