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Title: 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.

Authors:
; ; ; ; ; ; ; ; ; ;
Publication Date:
Research Org.:
Ames Lab., Ames, IA (United States); Univ. of Wisconsin, Madison, WI (United States)
Sponsoring Org.:
USDOE Office of Science (SC), Basic Energy Sciences (BES)
OSTI Identifier:
1328496
Alternate Identifier(s):
OSTI ID: 1335026; OSTI ID: 1357022
Report Number(s):
IS-J-9131
Journal ID: ISSN 0027-8424; /pnas/113/42/11738.atom
Grant/Contract Number:  
FG02-03ER46028; J1102; AC02-07CH11358; W911NF-12-0607; 319360
Resource Type:
Published Article
Journal Name:
Proceedings of the National Academy of Sciences of the United States of America
Additional Journal Information:
Journal Name: Proceedings of the National Academy of Sciences of the United States of America Journal Volume: 113 Journal Issue: 42; Journal ID: ISSN 0027-8424
Publisher:
Proceedings of the National Academy of Sciences
Country of Publication:
United States
Language:
English
Subject:
97 MATHEMATICS AND COMPUTING; 77 NANOSCIENCE AND NANOTECHNOLOGY; Si/SiGe quantum dot; qubit; dynamical decoupling; randomized benchmarking; electron spin

Citation Formats

Kawakami, Erika, Jullien, Thibaut, Scarlino, Pasquale, Ward, Daniel R., Savage, Donald E., Lagally, Max G., Dobrovitski, Viatcheslav V., Friesen, Mark, Coppersmith, Susan N., Eriksson, Mark A., and Vandersypen, Lieven M. K. Gate fidelity and coherence of an electron spin in an Si/SiGe quantum dot with micromagnet. United States: N. p., 2016. Web. doi:10.1073/pnas.1603251113.
Kawakami, Erika, Jullien, Thibaut, Scarlino, Pasquale, Ward, Daniel R., Savage, Donald E., Lagally, Max G., Dobrovitski, Viatcheslav V., Friesen, Mark, Coppersmith, Susan N., Eriksson, Mark A., & Vandersypen, Lieven M. K. Gate fidelity and coherence of an electron spin in an Si/SiGe quantum dot with micromagnet. United States. doi:10.1073/pnas.1603251113.
Kawakami, Erika, Jullien, Thibaut, Scarlino, Pasquale, Ward, Daniel R., Savage, Donald E., Lagally, Max G., Dobrovitski, Viatcheslav V., Friesen, Mark, Coppersmith, Susan N., Eriksson, Mark A., and Vandersypen, Lieven M. K. Mon . "Gate fidelity and coherence of an electron spin in an Si/SiGe quantum dot with micromagnet". United States. doi:10.1073/pnas.1603251113.
@article{osti_1328496,
title = {Gate fidelity and coherence of an electron spin in an Si/SiGe quantum dot with micromagnet},
author = {Kawakami, Erika and Jullien, Thibaut and Scarlino, Pasquale and Ward, Daniel R. and Savage, Donald E. and Lagally, Max G. and Dobrovitski, Viatcheslav V. and Friesen, Mark and Coppersmith, Susan N. and Eriksson, Mark A. and Vandersypen, Lieven M. K.},
abstractNote = {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.},
doi = {10.1073/pnas.1603251113},
journal = {Proceedings of the National Academy of Sciences of the United States of America},
number = 42,
volume = 113,
place = {United States},
year = {2016},
month = {10}
}

Journal Article:
Free Publicly Available Full Text
Publisher's Version of Record
DOI: 10.1073/pnas.1603251113

Citation Metrics:
Cited by: 13 works
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    Works referencing / citing this record:

    Characterization of a quasistatic environment with a qubit
    journal, June 2019


    Spin-Blockade Spectroscopy of Si / Si - Ge Quantum Dots
    journal, July 2019