Light-induced fractional quantum Hall phases in graphene

In electronic fractional quantum Hall (FQH) systems the kinetic energy of the carriers is quenched and the physics is entirely determined by electron-electron interactions.  The dominant role played by interactions and many-body effects makes FQH systems highly sensitive to small perturbations.  In this work, we show that one can induce a phase transition from a particle-hole conjugate Laughlin 1/3 state in graphene to a bilayer singlet state by optically driving the transition from the first to the second Landau level.  The ability to manipulate topologically ordered matter with light opens up exciting possibilities for optical manipulation and control of these states, which may ultimately lead to a novel route towards braiding of non-Abelian anyons in exotic FQH phases. 

https://arxiv.org/abs/1612.08748

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