Two-Dimensional Si Spin Qubit Arrays with Multilevel Interconnects
The promise of quantum computation is contingent upon physical qubits with both a low gate error rate and broad scalability. Silicon-based spins are a leading qubit platform but demonstrations to date have not utilized fabrication processes capable of extending arrays in two dimensions while maintai...
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| Main Authors: | , , , , , , , , , , , , , , , , , , , , , , , , , , , , |
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| Format: | Article |
| Language: | English |
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American Physical Society
2025-08-01
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| Series: | PRX Quantum |
| Online Access: | http://doi.org/10.1103/sgn1-1t2d |
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| _version_ | 1849765476538777600 |
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| author | Sieu D. Ha Edwin Acuna Kate Raach Zachery T. Bloom Teresa L. Brecht James M. Chappell Maxwell D. Choi Justin E. Christensen Ian T. Counts Dominic Daprano J.P. Dodson Kevin Eng David J. Fialkow Christina A. C. Garcia Wonill Ha Thomas R. B. Harris nathan holman Isaac Khalaf Justine W. Matten Christi A. Peterson Clifford E. Plesha Matthew J. Ruiz Aaron Smith Bryan J. Thomas Samuel J. Whiteley Thaddeus D. Ladd Michael P. Jura Matthew T. Rakher Matthew G. Borselli |
| author_facet | Sieu D. Ha Edwin Acuna Kate Raach Zachery T. Bloom Teresa L. Brecht James M. Chappell Maxwell D. Choi Justin E. Christensen Ian T. Counts Dominic Daprano J.P. Dodson Kevin Eng David J. Fialkow Christina A. C. Garcia Wonill Ha Thomas R. B. Harris nathan holman Isaac Khalaf Justine W. Matten Christi A. Peterson Clifford E. Plesha Matthew J. Ruiz Aaron Smith Bryan J. Thomas Samuel J. Whiteley Thaddeus D. Ladd Michael P. Jura Matthew T. Rakher Matthew G. Borselli |
| author_sort | Sieu D. Ha |
| collection | DOAJ |
| description | The promise of quantum computation is contingent upon physical qubits with both a low gate error rate and broad scalability. Silicon-based spins are a leading qubit platform but demonstrations to date have not utilized fabrication processes capable of extending arrays in two dimensions while maintaining complete control of individual spins. Here, we implement an interconnect process, common in semiconductor manufacturing, with multiple back-end-of-line layers, to show an extendable two-dimensional array of spins with fully controllable nearest-neighbor exchange interactions. In a device using three interconnect layers, we encode exchange-only qubits and achieve average single-qubit gate fidelities consistent with single-layer devices, including fidelities greater than 99.9%, as measured by blind randomized benchmarking. Moreover, with spin connectivity in two dimensions, we show that both linear and right-angle exchange-only qubits with high performance can be formed, enabling qubit array reconfigurability in the presence of defects. This extendable device platform demonstrates that industrial manufacturing techniques can be leveraged for scalable spin qubit technologies. |
| format | Article |
| id | doaj-art-2f9bc3c135db49688cc2d304260219c2 |
| institution | DOAJ |
| issn | 2691-3399 |
| language | English |
| publishDate | 2025-08-01 |
| publisher | American Physical Society |
| record_format | Article |
| series | PRX Quantum |
| spelling | doaj-art-2f9bc3c135db49688cc2d304260219c22025-08-20T03:04:50ZengAmerican Physical SocietyPRX Quantum2691-33992025-08-016303032710.1103/sgn1-1t2dTwo-Dimensional Si Spin Qubit Arrays with Multilevel InterconnectsSieu D. HaEdwin AcunaKate RaachZachery T. BloomTeresa L. BrechtJames M. ChappellMaxwell D. ChoiJustin E. ChristensenIan T. CountsDominic DapranoJ.P. DodsonKevin EngDavid J. FialkowChristina A. C. GarciaWonill HaThomas R. B. Harrisnathan holmanIsaac KhalafJustine W. MattenChristi A. PetersonClifford E. PleshaMatthew J. RuizAaron SmithBryan J. ThomasSamuel J. WhiteleyThaddeus D. LaddMichael P. JuraMatthew T. RakherMatthew G. BorselliThe promise of quantum computation is contingent upon physical qubits with both a low gate error rate and broad scalability. Silicon-based spins are a leading qubit platform but demonstrations to date have not utilized fabrication processes capable of extending arrays in two dimensions while maintaining complete control of individual spins. Here, we implement an interconnect process, common in semiconductor manufacturing, with multiple back-end-of-line layers, to show an extendable two-dimensional array of spins with fully controllable nearest-neighbor exchange interactions. In a device using three interconnect layers, we encode exchange-only qubits and achieve average single-qubit gate fidelities consistent with single-layer devices, including fidelities greater than 99.9%, as measured by blind randomized benchmarking. Moreover, with spin connectivity in two dimensions, we show that both linear and right-angle exchange-only qubits with high performance can be formed, enabling qubit array reconfigurability in the presence of defects. This extendable device platform demonstrates that industrial manufacturing techniques can be leveraged for scalable spin qubit technologies.http://doi.org/10.1103/sgn1-1t2d |
| spellingShingle | Sieu D. Ha Edwin Acuna Kate Raach Zachery T. Bloom Teresa L. Brecht James M. Chappell Maxwell D. Choi Justin E. Christensen Ian T. Counts Dominic Daprano J.P. Dodson Kevin Eng David J. Fialkow Christina A. C. Garcia Wonill Ha Thomas R. B. Harris nathan holman Isaac Khalaf Justine W. Matten Christi A. Peterson Clifford E. Plesha Matthew J. Ruiz Aaron Smith Bryan J. Thomas Samuel J. Whiteley Thaddeus D. Ladd Michael P. Jura Matthew T. Rakher Matthew G. Borselli Two-Dimensional Si Spin Qubit Arrays with Multilevel Interconnects PRX Quantum |
| title | Two-Dimensional Si Spin Qubit Arrays with Multilevel Interconnects |
| title_full | Two-Dimensional Si Spin Qubit Arrays with Multilevel Interconnects |
| title_fullStr | Two-Dimensional Si Spin Qubit Arrays with Multilevel Interconnects |
| title_full_unstemmed | Two-Dimensional Si Spin Qubit Arrays with Multilevel Interconnects |
| title_short | Two-Dimensional Si Spin Qubit Arrays with Multilevel Interconnects |
| title_sort | two dimensional si spin qubit arrays with multilevel interconnects |
| url | http://doi.org/10.1103/sgn1-1t2d |
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