Coherent coupling between a quantum dot and a donor in silicon

Harvey-Collard, Patrick; Jacobson, N. Tobias; Rudolph, Martin; Dominguez, Jason; Ten Eyck, Gregory A.; Wendt, Joel R.; Pluym, Tammy; Gamble, John King; Lilly, Michael P.; Pioro-Ladrière, Michel; Carroll, Malcolm S.

doi:10.1038/s41467-017-01113-2

Coherent coupling between a quantum dot and a donor in silicon

Journal Article · Wed Oct 18 00:00:00 EDT 2017 · Nature Communications

DOI:https://doi.org/10.1038/s41467-017-01113-2· OSTI ID:1399890

^[1]; Jacobson, N. Tobias ^[2]; Rudolph, Martin ^[3]; Dominguez, Jason ^[3]; Ten Eyck, Gregory A. ^[3]; Wendt, Joel R. ^[3]; Pluym, Tammy ^[3]; Gamble, John King ^[2]; Lilly, Michael P. ^[4]; Pioro-Ladrière, Michel ^[5]; Carroll, Malcolm S. ^[3]

Univ. of Sherbrooke, QC (Canada). Dept. of Physics and Quantum Inst.; Sandia National Lab. (SNL-NM), Albuquerque, NM (United States)
Sandia National Lab. (SNL-NM), Albuquerque, NM (United States). Center for Computing Research
Sandia National Lab. (SNL-NM), Albuquerque, NM (United States)
Sandia National Lab. (SNL-NM), Albuquerque, NM (United States). Center for Integrated Nanotechnologies
Univ. of Sherbrooke, QC (Canada). Dept. of Physics and Quantum Inst.; Canadian Inst. for Advanced Research, Toronto, ON (Canada). Quantum Information Science Program

Individual donors in silicon chips are used as quantum bits with extremely low error rates. However, physical realizations have been limited to one donor because their atomic size causes fabrication challenges. Quantum dot qubits, in contrast, are highly adjustable using electrical gate voltages. This adjustability could be leveraged to deterministically couple donors to quantum dots in arrays of qubits. In this work, we demonstrate the coherent interaction of a 31P donor electron with the electron of a metal-oxide-semiconductor quantum dot. We form a logical qubit encoded in the spin singlet and triplet states of the two-electron system. We show that the donor nuclear spin drives coherent rotations between the electronic qubit states through the contact hyperfine interaction. This provides every key element for compact two-electron spin qubits requiring only a single dot and no additional magnetic field gradients, as well as a means to interact with the nuclear spin qubit.

View Accepted Manuscript (DOE)

Research Organization:: Sandia National Laboratories (SNL-NM), Albuquerque, NM (United States)

Sponsoring Organization:: USDOE National Nuclear Security Administration (NNSA)

Grant/Contract Number:: AC04-94AL85000

OSTI ID:: 1399890

Alternate ID(s):: OSTI ID: 1411598
OSTI ID: 1251594
OSTI ID: 1465802

Report Number(s):: SAND--2016-10474J; SAND--2017-2538J; SAND--2017-6493J; 648381

Journal Information:: Nature Communications, Journal Name: Nature Communications Journal Issue: 1 Vol. 8; ISSN 2041-1723

Publisher:: Nature Publishing GroupCopyright Statement

Country of Publication:: United States

Language:: English

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Long-term drift of Si-MOS quantum dots with intentional donor implants Rudolph, Martin; Sarabi, Bahman; Murray, Roy arXiv https://doi.org/10.48550/arxiv.1801.07776	preprint	January 2018
Gate fidelity comparison in semiconducting spin qubit implementations affected by control noises Ferraro, E.; Fanciulli, M.; De Michielis, M. arXiv https://doi.org/10.48550/arxiv.1806.07597	text	January 2018
Single and Double Hole Quantum Dots in Strained Ge/SiGe Quantum Wells Hardy, Will J.; Harris, C. Thomas; Su, Yi-Hsin arXiv https://doi.org/10.48550/arxiv.1808.07077	text	January 2018
A low-disorder Metal-Oxide-Silicon double quantum dot Kim, Jin-Sung; Hazard, Thomas M.; Houck, Andrew A. arXiv https://doi.org/10.48550/arxiv.1810.06516	text	January 2018
A Silicon Surface Code Architecture Resilient Against Leakage Errors Cai, Zhenyu; Fogarty, Michael A.; Schaal, Simon arXiv https://doi.org/10.48550/arxiv.1904.10378	text	January 2019
Low-frequency charge noise in Si/SiGe quantum dots Connors, Elliot J.; Nelson, Jj; Qiao, Haifeng arXiv https://doi.org/10.48550/arxiv.1907.07549	text	January 2019
High-Fidelity Entangling Gates for Quantum-Dot Hybrid Qubits Based on Exchange Interactions Yang, Yuan-Chi; Coppersmith, S. N.; Friesen, Mark arXiv https://doi.org/10.48550/arxiv.1910.03427	text	January 2019

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71 CLASSICAL AND QUANTUM MECHANICS
GENERAL PHYSICS
quantum dots
quantum information
qubits

Coherent coupling between a quantum dot and a donor in silicon

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