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Article Dans Une Revue Physical Review B Année : 2022

Superradiant quantum phase transition for Landau polaritons with Rashba and Zeeman couplings

Résumé

We develop a theory of cavity quantum electrodynamics for a two-dimensional electron gas in the presence of Rashba spin-orbit and Zeeman couplings and perpendicular magnetic field, coupled to a spatially nonuniform quantum photon field. We show that the superradiant quantum phase transition (SQPT), also known as photon condensation, can, in principle, occur through a pure in-plane Zeeman coupling, but it requires extremely small (unrealistic) quantum well widths or extremely fine tuning of the effective Landé factor which makes two Landau levels coincide. Landau-level crossings can also be induced by the Rashba spin-orbit coupling and they promote the SQPT, which can be obtained for certain values of the effective Landé factor and filling factors.

Dates et versions

hal-03705704 , version 1 (27-06-2022)

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Citer

Guillaume Manzanares, Thierry Champel, Denis M. Basko, Pierre Nataf. Superradiant quantum phase transition for Landau polaritons with Rashba and Zeeman couplings. Physical Review B, 2022, 105 (24), pp.245304. ⟨10.1103/PhysRevB.105.245304⟩. ⟨hal-03705704⟩

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