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Coherent Adiabatic Spin Control in the Presence of Charge Noise Using Tailored Pulses

Coherent Adiabatic Spin Control in the Presence of Charge Noise Using Tailored Pulses

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RIBEIRO, Hugo, Guido BURKARD, Jason R. PETTA, Hong LU, Arthur C. GOSSARD, 2013. Coherent Adiabatic Spin Control in the Presence of Charge Noise Using Tailored Pulses. In: Physical Review Letters. 110(8). ISSN 0031-9007. eISSN 1079-7114. Available under: doi: 10.1103/PhysRevLett.110.086804

@article{Ribeiro2013Coher-24804, title={Coherent Adiabatic Spin Control in the Presence of Charge Noise Using Tailored Pulses}, year={2013}, doi={10.1103/PhysRevLett.110.086804}, number={8}, volume={110}, issn={0031-9007}, journal={Physical Review Letters}, author={Ribeiro, Hugo and Burkard, Guido and Petta, Jason R. and Lu, Hong and Gossard, Arthur C.} }

2013-10-11T07:47:42Z eng 2013-10-11T07:47:42Z Coherent Adiabatic Spin Control in the Presence of Charge Noise Using Tailored Pulses Gossard, Arthur C. Lu, Hong Burkard, Guido We study finite-time Landau-Zener transitions at a singlet-triplet level crossing in a GaAs double quantum dot, both experimentally and theoretically. Sweeps across the anticrossing in the high driving speed limit result in oscillations with a small visibility. Here we demonstrate how to increase the oscillation visibility while keeping sweep times shorter than T<sub>2</sub><sup>*</sup> using a tailored pulse with a detuning dependent level velocity. Our results show an improvement of a factor of -2.9 for the oscillation visibility. In particular, we were able to obtain a visibility of -0.5 for Stückelberg oscillations, which demonstrates the creation of an equally weighted superposition of the qubit states. Gossard, Arthur C. deposit-license Petta, Jason R. 2013 Ribeiro, Hugo Physical Review Letters ; 110 (2013), 8. - 086804 Ribeiro, Hugo Lu, Hong Petta, Jason R. Burkard, Guido

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