Quantum control and process tomography of a semiconductor quantum dot hybrid qubit

Dohun Kim, Zhan Shi, C. B. Simmons, D. R. Ward, J. R. Prance, Teck Seng Koh, John King Gamble, D. E. Savage, M. G. Lagally, Mark Friesen, S. N. Coppersmith and Mark A. Eriksson ()
Additional contact information
Dohun Kim: University of Wisconsin-Madison
Zhan Shi: University of Wisconsin-Madison
C. B. Simmons: University of Wisconsin-Madison
D. R. Ward: University of Wisconsin-Madison
J. R. Prance: University of Wisconsin-Madison
Teck Seng Koh: University of Wisconsin-Madison
John King Gamble: Sandia National Laboratories
D. E. Savage: University of Wisconsin-Madison
M. G. Lagally: University of Wisconsin-Madison
Mark Friesen: University of Wisconsin-Madison
S. N. Coppersmith: University of Wisconsin-Madison
Mark A. Eriksson: University of Wisconsin-Madison

Nature, 2014, vol. 511, issue 7507, 70-74

Abstract: A simply prepared quantum bit that is a hybrid of spin and charge enables full control on the Bloch sphere with π-rotation times of less than 100 picoseconds in two orthogonal directions; the speed arises from the charge-like characteristics, and the spin-like features result in increased quantum coherence.

Date: 2014
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DOI: 10.1038/nature13407

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