Stuttgart 2012 – scientific programme

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Q: Fachverband Quantenoptik und Photonik

Q 22: Quantengase: Wechselwirkungseffekte 1

Q 22.4: Talk

Tuesday, March 13, 2012, 11:30–11:45, V7.03

Fractional Quantum Hall Effect of Rydberg-Polaritons — •Fabian Grusdt¹, Michael Fleischhauer¹, Michael Höning¹, and Johannes Otterbach² — ¹Fachbereich Physik und Landesforschungszentrum OPTIMAS, TU Kaiserslautern — ²Physics Department, Harvard University, Cambridge, Massachusetts, USA

Dark-state-polaritons (DSP) are bosonic quasiparticles arising in the interaction of light with 3-level atoms under conditions of electromagnetically induced transparency (EIT). They can be exposed to artificial magnetic fields, strong enough to enter the lowest Landau level regime [Otterbach et. al., Phys. Rev. Lett. 104 (2010)]. We consider additional Van-der-Waals interactions, as realized e.g. when the EIT 3-level atom contains a Rydberg-excited state, and investigate the resulting fractional quantum Hall effect of the DSPs. The realization of the ν=1/2-Laughlin state and its anyonic quasihole excitations via strong Polariton-Polariton losses is discussed. A numerical and semi-analytical evaluation of the gap to these excitations is presented and the implications for the robustness of such states are shown.