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Title: Coherent coupling between a quantum dot and a donor in silicon

Abstract

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.

Authors:
ORCiD logo [1];  [2];  [3];  [3];  [3];  [3];  [3];  [2];  [4];  [5];  [3]
  1. Univ. of Sherbrooke, QC (Canada). Dept. of Physics and Quantum Inst.; Sandia National Lab. (SNL-NM), Albuquerque, NM (United States)
  2. Sandia National Lab. (SNL-NM), Albuquerque, NM (United States). Center for Computing Research
  3. Sandia National Lab. (SNL-NM), Albuquerque, NM (United States)
  4. Sandia National Lab. (SNL-NM), Albuquerque, NM (United States). Center for Integrated Nanotechnologies
  5. Univ. of Sherbrooke, QC (Canada). Dept. of Physics and Quantum Inst.; Canadian Inst. for Advanced Research, Toronto, ON (Canada). Quantum Information Science Program
Publication Date:
Research Org.:
Sandia National Lab. (SNL-NM), Albuquerque, NM (United States)
Sponsoring Org.:
USDOE National Nuclear Security Administration (NNSA)
OSTI Identifier:
1399890
Alternate Identifier(s):
OSTI ID: 1411598; OSTI ID: 1465802
Report Number(s):
SAND-2016-10474J; SAND-2017-2538J; SAND-2017-6493J
Journal ID: ISSN 2041-1723; 648381
Grant/Contract Number:  
AC04-94AL85000
Resource Type:
Journal Article: Accepted Manuscript
Journal Name:
Nature Communications
Additional Journal Information:
Journal Volume: 8; Journal Issue: 1; Journal ID: ISSN 2041-1723
Publisher:
Nature Publishing Group
Country of Publication:
United States
Language:
English
Subject:
71 CLASSICAL AND QUANTUM MECHANICS, GENERAL PHYSICS; quantum dots; quantum information; qubits

Citation Formats

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, and Carroll, Malcolm S.. Coherent coupling between a quantum dot and a donor in silicon. United States: N. p., 2017. Web. doi:10.1038/s41467-017-01113-2.
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.. Coherent coupling between a quantum dot and a donor in silicon. United States. doi:10.1038/s41467-017-01113-2.
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, and Carroll, Malcolm S.. Wed . "Coherent coupling between a quantum dot and a donor in silicon". United States. doi:10.1038/s41467-017-01113-2. https://www.osti.gov/servlets/purl/1399890.
@article{osti_1399890,
title = {Coherent coupling between a quantum dot and a donor in silicon},
author = {Harvey-Collard, Patrick and Jacobson, N. Tobias and Rudolph, Martin and Dominguez, Jason and Ten Eyck, Gregory A. and Wendt, Joel R. and Pluym, Tammy and Gamble, John King and Lilly, Michael P. and Pioro-Ladrière, Michel and Carroll, Malcolm S.},
abstractNote = {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.},
doi = {10.1038/s41467-017-01113-2},
journal = {Nature Communications},
number = 1,
volume = 8,
place = {United States},
year = {Wed Oct 18 00:00:00 EDT 2017},
month = {Wed Oct 18 00:00:00 EDT 2017}
}

Journal Article:
Free Publicly Available Full Text
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Cited by: 9 works
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