Draft:Silicon Quantum Computing

{{Short description|Quantum computing company background}}

{{Draft topics|computing|physics}}

{{AfC topic|org}}

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{{AFC submission|d|corp|u=User03sd|ns=118|decliner=Caleb Stanford|declinets=20250328010638|ts=20250310055639}}

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{{AFC comment|1=Thank you for addressing my comments from earlier! I do believe that the topic may be notable, but I'm afraid the article needs a complete rewrite. A few overarching themes: (1) Please remove further promotional language throughout. For example: "SQC is a full stack technology company building both hardware and software", "The company exploits leading-edge manufacturing technology", and much of the "Technology" section. (2) Much of the text appears to be synthesized from academic papers, much of them published by Simmons. The problem with this is that, besides not demonstrating independently notability, it constitutes possible WP:OR (or insider information) as it's not clear whether this history is more widely known - see for example, "Technical achievements prior to the formation of the company". I took a look at the citation "Spectroscopy of few-electron single-crystal silicon quantum dots" and the article itself does not mention SQM at all. For now, I think the best route is just to remove such details unless there are other, non-primary sources covering the history of the company. (3) The article relies too much on primary sources. Besides the large number of academic sources, currently UNSW, SQC are key sources that are unfortunately primary. To move forward, we need some high-quality independent sources. I did some brief searching and [https://www.techrepublic.com/article/australian-government-quantum-investments/ This article] could be a good starting point. Caleb Stanford (talk) 01:06, 28 March 2025 (UTC)}}

{{AFC comment|1=The references are not formatted correctly. Please clean them up using the citation generator to create them (e.g. URL, website, author, title, date, access-date, etc.)

The article is written in a promotional tone: "Silicon Quantum Computing is the only company worldwide that can manufacture quantum processors with atomic precision" Please fix this.

"Australian Research Council (ARC)" is a red link.

Some sentences are missing citations, e.g., "Many competitor businesses pursue “top down” processes, who take already-scaled technologies looking to combine them to make a quantum computer. SQC’s approach is an example of “bottom up” quantum computation. SQC has started with naturally quantum components and processes. ". Caleb Stanford (talk) 21:13, 8 March 2025 (UTC)}}

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{{Promotional|date=March 2025}}

Silicon Quantum Computing Pty Ltd (SQC) is a quantum computing company based in Sydney, Australia. The company develops quantum computers using precision engineered atom qubits in pure silicon, a concept originally proposed by Bruce Kane in 1998. SQC is a full stack technology company[https://thequantuminsider.com/2022/06/23/silicon-quantum-computing-announces-its-first-quantum-integrated-circuit/] aiming to deliver a utility-scale quantum computer by 2033.{{Cite web |title=DARPA eyes companies targeting industrially useful quantum computers {{!}} DARPA |url=https://www.darpa.mil/news/2025/companies-targeting-quantum-computers |access-date=2025-04-14 |website=www.darpa.mil}}

Silicon Quantum Computing was founded in May 2017, by [https://australianoftheyear.org.au/recipients/professor-michelle-simmons-ao 2018 Australian of the Year], Michelle Simmons and is supported by the Commonwealth Bank, Telstra, the Commonwealth Government, the Government of NSW and the University of New South Wales.{{Cite web |title=Australia's first quantum computing company launches at UNSW |url=https://www.unsw.edu.au/newsroom/news/2017/08/australia_s-first-quantum-computing-company-launches-at-unsw- |access-date=2025-03-10 |website=UNSW Sites |language=en}}

In 2012 Simmons demonstrated a single atom transistor,{{Cite journal |last1=Fuechsle |first1=Martin |last2=Miwa |first2=Jill A. |last3=Mahapatra |first3=Suddhasatta |last4=Ryu |first4=Hoon |last5=Lee |first5=Sunhee |last6=Warschkow |first6=Oliver |last7=Hollenberg |first7=Lloyd C. L. |last8=Klimeck |first8=Gerhard |last9=Simmons |first9=Michelle Y. |date=2012 |title=A single-atom transistor |url=https://www.nature.com/articles/nnano.2012.21 |journal=Nature Nanotechnology |language=en |volume=7 |issue=4 |pages=242–246 |bibcode=2012NatNa...7..242F |doi=10.1038/nnano.2012.21 |issn=1748-3395 |pmid=22343383}} [https://www.guinnessworldrecords.com/world-records/smallest-transistor the world’s smallest transistor] based on the ability to place a single phosphorus atom in silicon with atomic precision.{{Cite journal |last1=Schofield |first1=S. R. |last2=Curson |first2=N. J. |last3=Simmons |first3=M. Y. |last4=Rueß |first4=F. J. |last5=Hallam |first5=T. |last6=Oberbeck |first6=L. |last7=Clark |first7=R. G. |date=2003-09-25 |title=Atomically Precise Placement of Single Dopants in Si |url=https://journals.aps.org/prl/abstract/10.1103/PhysRevLett.91.136104 |journal=Physical Review Letters |volume=91 |issue=13 |pages=136104 |arxiv=cond-mat/0307599 |bibcode=2003PhRvL..91m6104S |doi=10.1103/PhysRevLett.91.136104 |pmid=14525322}} In 2022 SQC announced the world’s first integrated circuit manufactured with atomic precision{{Cite web |last=Fox |first=Will |title=World's first quantum computer integrated circuit |url=https://futuretimeline.net/blog/2022/07/3-worlds-first-quantum-computer-integrated-circuit.htm#:~:text=In%202012,%20a%20team%20at,manufactured%20at%20the%20atomic%20scale |access-date=2025-03-10 |website=www.futuretimeline.net |language=en}} and used this device to simulate the Su-Schrieffer-Heeger model.{{Cite journal |last1=Kiczynski |first1=M. |last2=Gorman |first2=S. K. |last3=Geng |first3=H. |last4=Donnelly |first4=M. B. |last5=Chung |first5=Y. |last6=He |first6=Y. |last7=Keizer |first7=J. G. |last8=Simmons |first8=M. Y. |date=2022 |title=Engineering topological states in atom-based semiconductor quantum dots |journal=Nature |language=en |volume=606 |issue=7915 |pages=694–699 |bibcode=2022Natur.606..694K |doi=10.1038/s41586-022-04706-0 |issn=1476-4687 |pmc=9217742 |pmid=35732762}}

Other notable peer-reviewed achievements include: fast (nanosecond) exchange gates,{{Cite journal |last1=He |first1=Y. |last2=Gorman |first2=S. K. |last3=Keith |first3=D. |last4=Kranz |first4=L. |last5=Keizer |first5=J. G. |last6=Simmons |first6=M. Y. |date=2019 |title=A two-qubit gate between phosphorus donor electrons in silicon |url=https://www.nature.com/articles/s41586-019-1381-2 |journal=Nature |language=en |volume=571 |issue=7765 |pages=371–375 |bibcode=2019Natur.571..371H |doi=10.1038/s41586-019-1381-2 |issn=1476-4687 |pmid=31316197 |hdl=1959.4/unsworks_63385}} high fidelity (99.95%) single shot read-out,{{Cite journal |last1=Keith |first1=Daniel |last2=Chung |first2=Yousun |last3=Kranz |first3=Ludwik |last4=Thorgrimsson |first4=Brandur |last5=Gorman |first5=Samuel K. |last6=Simmons |first6=Michelle Y. |date=2022-09-09 |title=Ramped measurement technique for robust high-fidelity spin qubit readout |url=https://doi.org/10.1126/sciadv.abq0455 |journal=Science Advances |volume=8 |issue=36 |pages=eabq0455 |bibcode=2022SciA....8..455K |doi=10.1126/sciadv.abq0455 |issn=2375-2548 |pmc=9451149 |pmid=36070386}} high fidelity initialisation,{{Cite journal |last1=Reiner |first1=J. |last2=Chung |first2=Y. |last3=Misha |first3=S. H. |last4=Lehner |first4=C. |last5=Moehle |first5=C. |last6=Poulos |first6=D. |last7=Monir |first7=S. |last8=Charde |first8=K. J. |last9=Macha |first9=P. |last10=Kranz |first10=L. |last11=Thorvaldson |first11=I. |last12=Thorgrimsson |first12=B. |last13=Keith |first13=D. |last14=Hsueh |first14=Y. L. |last15=Rahman |first15=R. |date=2024 |title=High-fidelity initialization and control of electron and nuclear spins in a four-qubit register |journal=Nature Nanotechnology |language=en |volume=19 |issue=5 |pages=605–611 |bibcode=2024NatNa..19..605R |doi=10.1038/s41565-023-01596-9 |issn=1748-3387 |pmc=11106007 |pmid=38326467}} long coherence times,{{Cite journal |last1=Fuechsle |first1=Martin |last2=Mahapatra |first2=S. |last3=Zwanenburg |first3=F. A. |last4=Friesen |first4=Mark |last5=Eriksson |first5=M. A. |last6=Simmons |first6=Michelle Y. |date=2010 |title=Spectroscopy of few-electron single-crystal silicon quantum dots |url=https://www.nature.com/articles/nnano.2010.95 |journal=Nature Nanotechnology |language=en |volume=5 |issue=7 |pages=502–505 |bibcode=2010NatNa...5..502F |doi=10.1038/nnano.2010.95 |issn=1748-3395 |pmid=20495552}} within a fully crystalline, low noise platform.{{Cite journal |last1=Kranz |first1=Ludwik |last2=Gorman |first2=Samuel Keith |last3=Thorgrimsson |first3=Brandur |last4=He |first4=Yu |last5=Keith |first5=Daniel |last6=Keizer |first6=Joris Gerhard |last7=Simmons |first7=Michelle Yvonne |date=2020 |title=Quantum Computing: Exploiting a Single-Crystal Environment to Minimize the Charge Noise on Qubits in Silicon (Adv. Mater. 40/2020) |url=https://doi.org/10.1002/adma.202070298 |journal=Advanced Materials |volume=32 |issue=40 |bibcode=2020AdM....3270298K |doi=10.1002/adma.202070298 |issn=0935-9648}}In February 2025 SQC demonstrated the world’s highest fidelity implementation of Grover’s algorithm without the need for error correction.{{Cite journal |last1=Thorvaldson |first1=I. |last2=Poulos |first2=D. |last3=Moehle |first3=C. M. |last4=Misha |first4=S. H. |last5=Edlbauer |first5=H. |last6=Reiner |first6=J. |last7=Geng |first7=H. |last8=Voisin |first8=B. |last9=Jones |first9=M. T. |last10=Donnelly |first10=M. B. |last11=Peña |first11=L. F. |last12=Hill |first12=C. D. |last13=Myers |first13=C. R. |last14=Keizer |first14=J. G. |last15=Chung |first15=Y. |date=2025-02-20 |title=Grover's algorithm in a four-qubit silicon processor above the fault-tolerant threshold |url=https://www.nature.com/articles/s41565-024-01853-5 |journal=Nature Nanotechnology |language=en |pages=1–6 |doi=10.1038/s41565-024-01853-5 |issn=1748-3395 |pmid=39979400}}