Towards hybrid circuit QED with spin qubits in quantum dots
A. Landig1, A. Stockklauser1, V. F. Maisi1, J. Basset2, K. Cujia1, C. Reichl1, W. Wegscheider1, T. Ihn1, A. Wallraff1, K. Ensslin1
1 Department of Physics, ETH Zurich, Switzerland
2 Laboratoire de Physique des Solides, University Paris-Sud, France
A hybrid circuit QED architecture allows for exploring charge and spin states in quantum dots. For charge states, this was for example demonstrated in [1-4]. Previously we have investigated microwave radiation emitted from a biased double quantum dot due to the inelastic tunneling of single charges [1]. Radiation has been detected over a broad range of detuning configurations between the dot energy levels with pronounced maxima occurring in resonance with a capacitively coupled transmission line resonator. The power emitted for forward and reverse resonant detuning has been found to be in good agreement with a rate equation model, which considers the hybridization of the individual dot charge states. Future work on the hybrid resonator double dot system will focus on spin states in the double dot. To address the spin with microwave fields, electric-dipole induced spin resonance will be used. Thereby, the spin and charge degrees of freedom of the electrons in the double dot are coupled in the slanting field of a micromagnet.
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