Cavity vacuum fields in ultra-strong coupling reduce the effective degeneracy of Landau levels in graphene, shifting quantum Hall features to densities more than 20% lower and producing a nonlinear Landau fan.
Cavity-modified quantum electron transport in multi-terminal devices and interferometers
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abstract
We theoretically investigate transport affected by cavity-mediated electron hopping in multi-terminal quantum Hall bars, quantum point contacts, and Aharonov-Bohm interferometers. Beyond determining conductances and resistances, we analyze spatially resolved current distributions and local density of states. Our study reveals how cavity-mediated inter-edge scattering impacts quantum magnetotransport in finite-size systems and how the cavity-mediated hopping significantly alters electron quantum interference effects.
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Observation of Cavity-Mediated Nonlinear Landau Fan and Modified Landau Level Degeneracy in Graphene Quantum Transport
Cavity vacuum fields in ultra-strong coupling reduce the effective degeneracy of Landau levels in graphene, shifting quantum Hall features to densities more than 20% lower and producing a nonlinear Landau fan.