skip to main content
OSTI.GOV title logo U.S. Department of Energy
Office of Scientific and Technical Information

Title: Silicon quantum processor with robust long-distance qubit couplings

Abstract

Practical quantum computers require a large network of highly coherent qubits, interconnected in a design robust against errors. Donor spins in silicon provide state-of-the-art coherence and quantum gate fidelities, in a platform adapted from industrial semiconductor processing. Here we present a scalable design for a silicon quantum processor that does not require precise donor placement and leaves ample space for the routing of interconnects and readout devices. We introduce the flip-flop qubit, a combination of the electron-nuclear spin states of a phosphorus donor that can be controlled by microwave electric fields. Two-qubit gates exploit a second-order electric dipole-dipole interaction, allowing selective coupling beyond the nearest-neighbor, at separations of hundreds of nanometers, while microwave resonators can extend the entanglement to macroscopic distances. We predict gate fidelities within fault-tolerance thresholds using realistic noise models. This design provides a realizable blueprint for scalable spin-based quantum computers in silicon.

Authors:
ORCiD logo; ; ; ; ; ; ORCiD logo
Publication Date:
Research Org.:
Oak Ridge National Lab. (ORNL), Oak Ridge, TN (United States)
Sponsoring Org.:
USDOE
OSTI Identifier:
1394154
DOE Contract Number:  
AC05-00OR22725
Resource Type:
Journal Article
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:
72 PHYSICS OF ELEMENTARY PARTICLES AND FIELDS

Citation Formats

Tosi, Guilherme, Mohiyaddin, Fahd A., Schmitt, Vivien, Tenberg, Stefanie, Rahman, Rajib, Klimeck, Gerhard, and Morello, Andrea. Silicon quantum processor with robust long-distance qubit couplings. United States: N. p., 2017. Web. doi:10.1038/s41467-017-00378-x.
Tosi, Guilherme, Mohiyaddin, Fahd A., Schmitt, Vivien, Tenberg, Stefanie, Rahman, Rajib, Klimeck, Gerhard, & Morello, Andrea. Silicon quantum processor with robust long-distance qubit couplings. United States. doi:10.1038/s41467-017-00378-x.
Tosi, Guilherme, Mohiyaddin, Fahd A., Schmitt, Vivien, Tenberg, Stefanie, Rahman, Rajib, Klimeck, Gerhard, and Morello, Andrea. Wed . "Silicon quantum processor with robust long-distance qubit couplings". United States. doi:10.1038/s41467-017-00378-x.
@article{osti_1394154,
title = {Silicon quantum processor with robust long-distance qubit couplings},
author = {Tosi, Guilherme and Mohiyaddin, Fahd A. and Schmitt, Vivien and Tenberg, Stefanie and Rahman, Rajib and Klimeck, Gerhard and Morello, Andrea},
abstractNote = {Practical quantum computers require a large network of highly coherent qubits, interconnected in a design robust against errors. Donor spins in silicon provide state-of-the-art coherence and quantum gate fidelities, in a platform adapted from industrial semiconductor processing. Here we present a scalable design for a silicon quantum processor that does not require precise donor placement and leaves ample space for the routing of interconnects and readout devices. We introduce the flip-flop qubit, a combination of the electron-nuclear spin states of a phosphorus donor that can be controlled by microwave electric fields. Two-qubit gates exploit a second-order electric dipole-dipole interaction, allowing selective coupling beyond the nearest-neighbor, at separations of hundreds of nanometers, while microwave resonators can extend the entanglement to macroscopic distances. We predict gate fidelities within fault-tolerance thresholds using realistic noise models. This design provides a realizable blueprint for scalable spin-based quantum computers in silicon.},
doi = {10.1038/s41467-017-00378-x},
journal = {Nature Communications},
issn = {2041-1723},
number = 1,
volume = 8,
place = {United States},
year = {2017},
month = {9}
}