Universal control of a six-qubit quantum processor in silicon
Abstract
Future quantum computers capable of solving relevant problems will require a large number of qubits that can be operated reliably. However, the requirements of having a large qubit count and operating with high fidelity are typically conflicting. Spins in semiconductor quantum dots show long-term promise but demonstrations so far use between one and four qubits and typically optimize the fidelity of either single- or two-qubit operations, or initialization and readout. Here, we increase the number of qubits and simultaneously achieve respectable fidelities for universal operation, state preparation and measurement. We design, fabricate and operate a six-qubit processor with a focus on careful Hamiltonian engineering, on a high level of abstraction to program the quantum circuits, and on efficient background calibration, all of which are essential to achieve high fidelities on this extended system. State preparation combines initialization by measurement and real-time feedback with quantum-non-demolition measurements. These advances will enable testing of increasingly meaningful quantum protocols and constitute a major stepping stone towards large-scale quantum computers.
- Authors:
-
[1];
[1];
[1];
[1];
[1];
[1];
[1];
[1];
[1]
- Delft University of Technology (Netherlands). Kavli Institute of Nanoscience
- Delft University of Technology (Netherlands)
- Publication Date:
- Research Org.:
- Univ. of Wisconsin, Madison, WI (United States); Delft Univ. of Technology (Netherlands)
- Sponsoring Org.:
- USDOE Office of Science (SC); Army Research Office (ARO); Marie Skłodowska-Curie; Keysight’s University Research Collaborations
- OSTI Identifier:
- 1904681
- Grant/Contract Number:
- FG02-03ER46028; W911NF-17-1-0274; W911NF-12-1-0607; 676108
- Resource Type:
- Accepted Manuscript
- Journal Name:
- Nature (London)
- Additional Journal Information:
- Journal Name: Nature (London); Journal Volume: 609; Journal Issue: 7929; Journal ID: ISSN 0028-0836
- Publisher:
- Nature Publishing Group
- Country of Publication:
- United States
- Language:
- English
- Subject:
- 71 CLASSICAL AND QUANTUM MECHANICS, GENERAL PHYSICS; 97 MATHEMATICS AND COMPUTING; quantum information; qubits
Citation Formats
Philips, Stephan G. J., Mądzik, Mateusz T., Amitonov, Sergey V., de Snoo, Sander L., Russ, Maximilian, Kalhor, Nima, Volk, Christian, Lawrie, William L., Brousse, Delphine, Tryputen, Larysa, Wuetz, Brian Paquelet, Sammak, Amir, Veldhorst, Menno, Scappucci, Giordano, and Vandersypen, Lieven M. K. Universal control of a six-qubit quantum processor in silicon. United States: N. p., 2022.
Web. doi:10.1038/s41586-022-05117-x.
Philips, Stephan G. J., Mądzik, Mateusz T., Amitonov, Sergey V., de Snoo, Sander L., Russ, Maximilian, Kalhor, Nima, Volk, Christian, Lawrie, William L., Brousse, Delphine, Tryputen, Larysa, Wuetz, Brian Paquelet, Sammak, Amir, Veldhorst, Menno, Scappucci, Giordano, & Vandersypen, Lieven M. K. Universal control of a six-qubit quantum processor in silicon. United States. https://doi.org/10.1038/s41586-022-05117-x
Philips, Stephan G. J., Mądzik, Mateusz T., Amitonov, Sergey V., de Snoo, Sander L., Russ, Maximilian, Kalhor, Nima, Volk, Christian, Lawrie, William L., Brousse, Delphine, Tryputen, Larysa, Wuetz, Brian Paquelet, Sammak, Amir, Veldhorst, Menno, Scappucci, Giordano, and Vandersypen, Lieven M. K. Wed .
"Universal control of a six-qubit quantum processor in silicon". United States. https://doi.org/10.1038/s41586-022-05117-x. https://www.osti.gov/servlets/purl/1904681.
@article{osti_1904681,
title = {Universal control of a six-qubit quantum processor in silicon},
author = {Philips, Stephan G. J. and Mądzik, Mateusz T. and Amitonov, Sergey V. and de Snoo, Sander L. and Russ, Maximilian and Kalhor, Nima and Volk, Christian and Lawrie, William L. and Brousse, Delphine and Tryputen, Larysa and Wuetz, Brian Paquelet and Sammak, Amir and Veldhorst, Menno and Scappucci, Giordano and Vandersypen, Lieven M. K.},
abstractNote = {Future quantum computers capable of solving relevant problems will require a large number of qubits that can be operated reliably. However, the requirements of having a large qubit count and operating with high fidelity are typically conflicting. Spins in semiconductor quantum dots show long-term promise but demonstrations so far use between one and four qubits and typically optimize the fidelity of either single- or two-qubit operations, or initialization and readout. Here, we increase the number of qubits and simultaneously achieve respectable fidelities for universal operation, state preparation and measurement. We design, fabricate and operate a six-qubit processor with a focus on careful Hamiltonian engineering, on a high level of abstraction to program the quantum circuits, and on efficient background calibration, all of which are essential to achieve high fidelities on this extended system. State preparation combines initialization by measurement and real-time feedback with quantum-non-demolition measurements. These advances will enable testing of increasingly meaningful quantum protocols and constitute a major stepping stone towards large-scale quantum computers.},
doi = {10.1038/s41586-022-05117-x},
journal = {Nature (London)},
number = 7929,
volume = 609,
place = {United States},
year = {Wed Sep 28 00:00:00 EDT 2022},
month = {Wed Sep 28 00:00:00 EDT 2022}
}
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