The Dicke model of cavity quantum electrodynamics is approximately realized in condensed matter when the cyclotron transition of a two-dimensional electron gas is nearly resonant with a cavity photon mode. We point out that in the strong coupling limit the Dicke model of cavity cyclotron resonance must be supplemented by a term that is quadratic in the cavity photon field and suppresses the model's transition to a super-radiant state. We develop the theory of graphene cavity cyclotron resonance and show that the quadratic term, which is absent in graphene's low-energy Dirac model Hamiltonian, is in this case dynamically generated by virtual inter-band transitions.
|Titolo:||Drude weight, cyclotron resonance, and the Dicke model of graphene cavity QED|
|Data di pubblicazione:||2012|
|Parole Chiave:||Quantum Optics; Dicke Model|
|Digital Object Identifier (DOI):||http://dx.doi.org/10.1103/PhysRevLett.109.267404|
|Appare nelle tipologie:||1.1 Articolo in rivista|