Company:Silicon Quantum Computing

From HandWiki
Short description: Australian quantum computing company
Silicon Quantum Computing
Silicon Quantum Computing Pty Ltd
TypePrivate
IndustryQuantum Computing
Founded2017
HeadquartersSydney, Australia
Key people
Websitesqc.com.au

Silicon Quantum Computing Pty Ltd (SQC) is a Sydney, Australia-based quantum computing company.

The company develops quantum computers and analogue quantum devices using phosphorus atoms manufactured within silicon[1] using scanning tunnelling microscopes, an approach within the field of spin qubits.

Distinct from other companies within the spin qubits modality, SQC uses the nuclear spin of phosphorus atoms placed[2] within isotopically pure Si-28 wafers for quantum computation. Atoms used as qubits have demonstrated favourable performance indicators such as long coherence times[3] and biased noise.[4]

History

SQC was founded by Michelle Simmons in 2017.[5] She is recognised for her foundational contributions[6] to the field of atomic electronics. The company is chaired by Simon Segars[7] the former Chief Executive Officer (CEO) of ARM Holdings PLC.

At incorporation, the company raised A$83 million from the Australian Federal Government, the New South Wales Government, the University of New South Wales, Telstra and the Commonwealth Bank of Australia.[8]

Manufacturing and technology

SQC uses phosphorus atoms precision-placed within pure silicon (Si-28)[9][1] to create qubits. The company manufactures their own quantum computing chips (QPUs) with sub-nanometre (atom level) precision at their Sydney headquarters.[10]

Simmons' research group, prior to the incorporation of SQC in 2012, created the first single atom transistor.[11] SQC created the 3D atom transistor in 2019[12] and an integrated circuit made with atomic precision in 2022.[13]

Grover's algorithm is one of the two foundational quantum algorithms (alongside Shor's algorithm). Grover's algorithm runs quadratically faster than the best possible classical algorithm for the same task, a linear search, and so has significant commercial relevance for optimisation problems. In 2025, SQC announced results of running Grover's on one of their quantum computing systems and achieving 98.87%[14] of the theoretical maximum. This result was achieved without error correction.[15]

Products

SQC manufactures three products. Two application-specific processors within the family of quantum analogue processors[16] and one series of quantum computers.

In August 2025, Australian Defence announced the purchase of a QML processor[17] to be housed on-premises within their data environment.

See also

References

  1. ↑ 1.0 1.1 Schofield, S. R.; Curson, N. J.; Simmons, M. Y.; Rueß, F. J.; Hallam, T.; Oberbeck, L.; Clark, R. G. (2003-09-25). "Atomically Precise Placement of Single Dopants in Si". Physical Review Letters 91 (13). doi:10.1103/PhysRevLett.91.136104. PMID 14525322. Bibcode: 2003PhRvL..91m6104S. https://link.aps.org/doi/10.1103/PhysRevLett.91.136104. 
  2. ↑ Kranz, Ludwik; Gorman, Samuel Keith; Thorgrimsson, Brandur; He, Yu; Keith, Daniel; Keizer, Joris Gerhard; Simmons, Michelle Yvonne (2020). "Exploiting a Single-Crystal Environment to Minimize the Charge Noise on Qubits in Silicon" (in en). Advanced Materials 32 (40). doi:10.1002/adma.202003361. ISSN 1521-4095. https://onlinelibrary.wiley.com/doi/abs/10.1002/adma.202003361. 
  3. ↑ Reiner, J.; Chung, Y.; Misha, S. H.; Lehner, C.; Moehle, C.; Poulos, D.; Monir, S.; Charde, K. J. et al. (2024). "High-fidelity initialization and control of electron and nuclear spins in a four-qubit register" (in en). Nature Nanotechnology 19 (5): 605–611. doi:10.1038/s41565-023-01596-9. ISSN 1748-3395. PMC 11106007. https://www.nature.com/articles/s41565-023-01596-9. 
  4. ↑ Kranz, Ludwik; Gorman, Samuel Keith; Thorgrimsson, Brandur; He, Yu; Keith, Daniel; Keizer, Joris Gerhard; Simmons, Michelle Yvonne (2020). "Exploiting a Single-Crystal Environment to Minimize the Charge Noise on Qubits in Silicon" (in en). Advanced Materials 32 (40). doi:10.1002/adma.202003361. ISSN 1521-4095. https://onlinelibrary.wiley.com/doi/abs/10.1002/adma.202003361. 
  5. ↑ "Australia gets quantum computing company". https://ia.acs.org.au/article/2017/australia-gets-quantum-computing-company.html. 
  6. ↑ Dargan, James (2023-10-19). "Michelle Simmons, 2018 Australian of the Year, Wins PM's Top Science Prize for Pioneering Quantum Computing in Atomic Electronics" (in en-US). https://thequantuminsider.com/2023/10/19/michelle-simmons-2018-australian-of-the-year-wins-pms-top-science-prize-for-pioneering-quantum-computing-in-atomic-electronics/. 
  7. ↑ "Fellow Detail Page | Royal Society" (in en). https://royalsociety.org/sitecore/content/royal-society/configuration/foundation/dynamics-api/fellowsdetailpage/. 
  8. ↑ "UNSW joins with government and business to keep quantum computing technology in Australia" (in en). 2017-08-22. https://www.afr.com/technology/unsw-joins-with-government-and-business-to-keep-quantum-computing-technology-in-australia-20170821-gy0tki. 
  9. ↑ "Silex and Silicon Quantum Computing Launch Silicon Enrichment Project for Quantum Computing" (in en-US). https://www.hpcwire.com/off-the-wire/silex-and-silicon-quantum-computing-launch-silicon-enrichment-project-for-quantum-computing/. 
  10. ↑ "Scientists emulate nature in quantum leap towards computers of the future" (in en). https://www.unsw.edu.au/newsroom/news/2022/06/scientists-emulate-nature-in-quantum-leap-towards-computers-of-the-future. 
  11. ↑ Fuechsle, Martin; Miwa, Jill A.; Mahapatra, Suddhasatta; Ryu, Hoon; Lee, Sunhee; Warschkow, Oliver; Hollenberg, Lloyd C. L.; Klimeck, Gerhard et al. (2012-02-19). "A single-atom transistor" (in en). Nature Nanotechnology 7 (4): 242–246. doi:10.1038/nnano.2012.21. ISSN 1748-3395. PMID 22343383. Bibcode: 2012NatNa...7..242F. https://www.nature.com/articles/nnano.2012.21. 
  12. ↑ Koch, Matthias; Keizer, Joris G.; Pakkiam, Prasanna; Keith, Daniel; House, Matthew G.; Peretz, Eldad; Simmons, Michelle Y. (2019-01-07). "Spin read-out in atomic qubits in an all-epitaxial three-dimensional transistor" (in en). Nature Nanotechnology 14 (2): 137–140. doi:10.1038/s41565-018-0338-1. ISSN 1748-3395. PMID 30617309. Bibcode: 2019NatNa..14..137K. https://www.nature.com/articles/s41565-018-0338-1. 
  13. ↑ Kiczynski, M.; Gorman, S. K.; Geng, H.; Donnelly, M. B.; Chung, Y.; He, Y.; Keizer, J. G.; Simmons, M. Y. (2022-06-22). "Engineering topological states in atom-based semiconductor quantum dots" (in en). Nature 606 (7915): 694–699. doi:10.1038/s41586-022-04706-0. ISSN 1476-4687. PMID 35732762. Bibcode: 2022Natur.606..694K. 
  14. ↑ Thorvaldson, I.; Poulos, D.; Moehle, C. M.; Misha, S. H.; Edlbauer, H.; Reiner, J.; Geng, H.; Voisin, B. et al. (2025-02-20). "Grover's algorithm in a four-qubit silicon processor above the fault-tolerant threshold" (in en). Nature Nanotechnology 20 (4): 472–477. doi:10.1038/s41565-024-01853-5. ISSN 1748-3395. PMC 12014505. https://www.nature.com/articles/s41565-024-01853-5. 
  15. ↑ Abdel-Kareem, Mohamed (2025-02-22). "Silicon Quantum Computing Demonstrates 98.9% Accuracy in Grover's Algorithm Execution Using Qubits with Phosphorus Atoms Placed into Silicon" (in en-US). https://quantumcomputingreport.com/silicon-quantum-computing-demonstrates-98-9-accuracy-in-grovers-algorithm-execution-using-phosphorus-qubits/. 
  16. ↑ Trivedi, Rahul; Franco Rubio, Adrian; Cirac, J. Ignacio (2024-08-02). "Quantum advantage and stability to errors in analogue quantum simulators" (in en). Nature Communications 15 (1): 6507. doi:10.1038/s41467-024-50750-x. ISSN 2041-1723. PMC 11297267. https://www.nature.com/articles/s41467-024-50750-x. 
  17. ↑ "Defence backs local next-generation innovation". 2025-08-25. https://www.defence.gov.au/news-events/releases/2025-08-25/defence-backs-local-next-generation-innovation. 



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