Eight-Qubit Operation of a 300 mm SiMOS Foundry-Fabricated Device
Fuente:
arXiv
Saved in:
| Main Authors: | , , , , , , , , , , , , , , , , , , , , , , , , , , |
|---|---|
| Format: | Preprint |
| Published: |
2025
|
| Subjects: | |
| Online Access: | |
| Tags: |
Add Tag
No Tags, Be the first to tag this record!
|
| _version_ | 1866913177313214464 |
|---|---|
| author | Nickl, Andreas Stuyck, Nard Dumoulin Steinacker, Paul Cifuentes, Jesus D. Serrano, Santiago Feng, MengKe Vahapoglu, Ensar Hudson, Fay E. Chan, Kok Wai Kubicek, Stefan Jussot, Julien Canvel, Yann Beyne, Sofie Shimura, Yosuke Loo, Roger Godfrin, Clement Raes, Bart Baudot, Sylvain Wan, Danny Laucht, Arne Yang, Chih-Hwan Lim, Wee Han Saraiva, Andre Escott, Christopher C. De Greve, Kristiaan Dzurak, Andrew S. Tanttu, Tuomo |
| author_facet | Nickl, Andreas Stuyck, Nard Dumoulin Steinacker, Paul Cifuentes, Jesus D. Serrano, Santiago Feng, MengKe Vahapoglu, Ensar Hudson, Fay E. Chan, Kok Wai Kubicek, Stefan Jussot, Julien Canvel, Yann Beyne, Sofie Shimura, Yosuke Loo, Roger Godfrin, Clement Raes, Bart Baudot, Sylvain Wan, Danny Laucht, Arne Yang, Chih-Hwan Lim, Wee Han Saraiva, Andre Escott, Christopher C. De Greve, Kristiaan Dzurak, Andrew S. Tanttu, Tuomo |
| contents | Silicon spin qubits are a promising platform for quantum computing due to their high coherence, controllability, and CMOS manufacturability, yet scalable implementations have so far been limited to a few qubits. Here, to take a step towards larger qubit systems, we tune and coherently control an eight-dot linear array of silicon spin qubits fabricated in a 300~mm CMOS-compatible foundry process, establishing operational scalability beyond the two-qubit regime. All eight qubits are successfully tuned and characterized as four double-dot pairs, exhibiting Ramsey dephasing times $T_2^*$ up to 41(2)$~μ$s and Hahn-echo coherence times $T_2^{\mathrm{Hahn}}$ up to 1.31(4)$~$ms. Readout of the central four qubits is achieved via a cascaded charge-sensing protocol, enabling high-fidelity measurements of the entire multi-qubit array in a two step process. Additionally, we demonstrate a two-qubit gate operation between adjacent qubits with low phase noise. We show that silicon spin qubit arrays can be scaled to medium-sized arrays of 8 qubits while maintaining system coherence. |
| format | Preprint |
| id |
arxiv_https___arxiv_org_abs_2512_10174 |
| institution | arXiv |
| publishDate | 2025 |
| record_format | arxiv |
| spellingShingle | Eight-Qubit Operation of a 300 mm SiMOS Foundry-Fabricated Device Nickl, Andreas Stuyck, Nard Dumoulin Steinacker, Paul Cifuentes, Jesus D. Serrano, Santiago Feng, MengKe Vahapoglu, Ensar Hudson, Fay E. Chan, Kok Wai Kubicek, Stefan Jussot, Julien Canvel, Yann Beyne, Sofie Shimura, Yosuke Loo, Roger Godfrin, Clement Raes, Bart Baudot, Sylvain Wan, Danny Laucht, Arne Yang, Chih-Hwan Lim, Wee Han Saraiva, Andre Escott, Christopher C. De Greve, Kristiaan Dzurak, Andrew S. Tanttu, Tuomo Quantum Physics Silicon spin qubits are a promising platform for quantum computing due to their high coherence, controllability, and CMOS manufacturability, yet scalable implementations have so far been limited to a few qubits. Here, to take a step towards larger qubit systems, we tune and coherently control an eight-dot linear array of silicon spin qubits fabricated in a 300~mm CMOS-compatible foundry process, establishing operational scalability beyond the two-qubit regime. All eight qubits are successfully tuned and characterized as four double-dot pairs, exhibiting Ramsey dephasing times $T_2^*$ up to 41(2)$~μ$s and Hahn-echo coherence times $T_2^{\mathrm{Hahn}}$ up to 1.31(4)$~$ms. Readout of the central four qubits is achieved via a cascaded charge-sensing protocol, enabling high-fidelity measurements of the entire multi-qubit array in a two step process. Additionally, we demonstrate a two-qubit gate operation between adjacent qubits with low phase noise. We show that silicon spin qubit arrays can be scaled to medium-sized arrays of 8 qubits while maintaining system coherence. |
| title | Eight-Qubit Operation of a 300 mm SiMOS Foundry-Fabricated Device |
| topic | Quantum Physics |
| url | https://arxiv.org/abs/2512.10174 |