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|Abstract:||We demonstrate multipulse quantum control of a single electron charge qubit. The qubit is manipulated by applying nonadiabatic voltage pulses to a surface depletion gate and readout is achieved using a quantum point-contact charge sensor. We observe Ramsey fringes in the excited-state occupation in response to a pi/2-pi/2 pulse sequence and extract T-2* similar to 60 ps away from the charge degeneracy point. Simulations suggest these results may be extended to implement a charge echo by reducing the interdot tunnel coupling and pulse rise time, thereby increasing the nonadiabaticity of the pulses.|
|Electronic Publication Date:||7-Oct-2011|
|Citation:||Dovzhenko, Y, Stehlik, J, Petersson, KD, Petta, JR, Lu, H, Gossard, AC. (2011). Nonadiabatic quantum control of a semiconductor charge qubit. PHYSICAL REVIEW B, 84 (10.1103/PhysRevB.84.161302|
|Type of Material:||Journal Article|
|Journal/Proceeding Title:||PHYSICAL REVIEW B|
|Version:||Final published version. Article is made available in OAR by the publisher's permission or policy.|
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