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|Abstract:||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-2* using a tailored pulse with a detuning dependent level velocity. Our results show an improvement of a factor of similar to 2.9 for the oscillation visibility. In particular, we were able to obtain a visibility of similar to 0.5 for Stuckelberg oscillations, which demonstrates the creation of an equally weighted superposition of the qubit states. DOI: 10.1103/PhysRevLett.110.086804|
|Electronic Publication Date:||21-Feb-2013|
|Citation:||Ribeiro, Hugo, Burkard, Guido, Petta, JR, Lu, H, Gossard, AC. (2013). Coherent Adiabatic Spin Control in the Presence of Charge Noise Using Tailored Pulses. PHYSICAL REVIEW LETTERS, 110 (10.1103/PhysRevLett.110.086804|
|Type of Material:||Journal Article|
|Journal/Proceeding Title:||PHYSICAL REVIEW LETTERS|
|Version:||Final published version. Article is made available in OAR by the publisher's permission or policy.|
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