Gate fidelity and coherence of an electron spin in an Si/SiGe quantum dot with micromagnet
Abstract
A quantum computer is able to solve certain problems that cannot be solved by a classical computer within a reasonable time. The building block of a quantum computer is called a quantum bit (qubit), the counterpart of the conventional binary digit (bit). A qubit unavoidably interacts with its environment, leading to errors in the qubit state. This article reports on the qubit performance of an electron spin in a silicon/silicon-germanium (Si/SiGe) quantum dot, and examines the dominant error mechanisms. We demonstrate that this qubit can be electrically controlled with sufficient accuracy so that remaining errors could, in principle, be corrected using known protocols, even without isotopically purified silicon. This qubit also offers a quantum memory that lasts for almost 0.5 ms.
Document Details
- Document Type
- Pub Defense Publication
- Publication Date
- Oct 03, 2016
- Source ID
- 10.1073/pnas.1603251113
Entities
People
- D. E. Savage
- Daniel R. Ward
- Erika Kawakami
- Lieven M K Vandersypen
- Mark Eriksson
- Mark Friesen
- Max G. Lagally
- Pasquale Scarlino
- Susan Coppersmith
- Thibaut Jullien
- Viatcheslav V. Dobrovitski
Organizations
- Army Research Office
- Delft University of Technology
- European Research Council
- Intel Corporation
- Iowa State University
- United States Department of Energy
- University of Wisconsin–Madison