PsiQuantum

We've been drawing Ψ's with photons on chips for years. Using our Omega platform we've miniaturized (x50) and improved control (>x20).

Our team has been developing and using the tools within Construct for nearly nine years. Now, we are making these tools available to our close partners and high-capacity users. ​ ​

Learn more: psiquantum.com/software

We’re excited to introduce Construct, the first purpose-built software platform for fault-tolerant quantum computing.​​
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Designing, developing, and optimizing fault-tolerant quantum algorithms. ​

Our architecture relies on large arrays of classical lasers to drive photon sources—too many for bulky, off-the-shelf solutions to scale affordably.​
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We’re reducing cost by integrating classical components on-chip, using the same photonics platform we built for quantum computing.

From the start, we’ve been singularly focused on building fault-tolerant quantum computers at the million-qubit scale. ​

This year we're breaking ground on the real thing, two utility-scale quantum computers in Brisbane and Chicago.

Our photonic qubits travel from different modules through standard optical fiber for fusion and must arrive synchronously. We can now passively control optical fiber, over the length of a mile, to a fraction of the width of a human hair—on spec for fusion-based quantum computing.

Bowen HS Science Program Gets $10K From PsiQuantum, A South Works Campus Tenant The donation quadruples the typical science department budget at the South Chicago school, where students have been learning through a quantum science lens, school leaders said.

Big news for South Chicago: @psiquantum.bsky.social is investing $10K in Bowen High School’s STEM program — funding hands-on tools like VR, drones and robotics. It’s part of their commitment to supporting students near the IQMP. More via @blockclubchi.bsky.social:

Our latest research with Stanford lays out a state-of-the-art framework to simulate real-time chemical reactions on a quantum computer, unlocking new possibilities for catalyst design, materials science, and cleaner energy solutions.

Read our blog: bit.ly/3Rl3ZHB ​
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Read the paper: bit.ly/4ifA4f3

Quantum computing offers a radically new approach to modeling catalytic reactions, going beyond classical approximations to capture the full complexity of chemical dynamics.

This 2-qubit QPU, aptly named “Qcloud,” launched at the British Science Festival in 2013 and now resides at the British Science Museum—proudly displayed next to an Enigma machine and Babbage difference engine.

Before PsiQuantum, our co-founders Jeremy O’Brien and Pete Shadbolt put the very first quantum processor on the cloud.

When combined with our ultra-low-loss edge coupler, this fiber interconnect becomes a compelling component of our path to large systems.

As teams around the world begin to scale up quantum computing systems, the need to connect chips together increasingly appears as a bottleneck. Our UK team just demonstrated a time-encoded lab-to-lab qubit interconnect over 250m of standard telecom fiber with 99.6% ±0.2% fidelity.

The next generation of our cryogenic cabinet is engineered to cool over 100 quantum chips from our Omega platform to liquid helium temperature. We will soon be welcoming this module at our facility in the UK and another cabinet at our new test and manufacturing facility in Silicon Valley.

Encouraging to see the whole field of quantum computing now beginning to take seriously the datacenter-like scaling challenges which motivated our founders to choose photons 25 years ago. Hear more from Pete Shadbolt tomorrow at NVIDIA's Quantum Day #GTC25.

Leveraging pre-existing industrial wafer testers as well as bespoke cryogenic test equipment, today PsiQuantum performs ~0.5 million room-temperature measurements per month and ~50K cryogenic measurements per month.

High-throughput testing is a critical and often overlooked part of the process of scaling from breakthrough devices in a research lab to a reliable, high-volume manufacturing process suitable for building million-qubit machines. ​

In the process, we built the biggest molecular beam epitaxy (MBE) tool in the world. ​

PsiQuantum has integrated this material into our Omega stack at GlobalFoundries, and we are now beginning to use these switches for multiplexed single-photon generation.

Photonic quantum computing has long dreamed of optical switches with well-beyond state-of-the-art performance. ​

We developed a 300mm manufacturing process for one of the strongest electro-optic materials known to science, barium titanate (BTO).

The latest paper from our Quantum Applications team and partners at Hartree Centre improves resource estimates for codebreaking of binary elliptic curve cryptography (ECC). Shor's algorithm helps our team benchmark resource estimates for commercial applications. www.psiquantum.com/featured-new...

Read more about the latest developments of Omega: www.psiquantum.com/featured-new...

The performance of the photonic components in our Omega chipset, recently reported in Nature, is already beyond-state-of-the-art. However, the data in the paper is more than a year old. We have since continued to improve waveguide losses and other device characteristics.

A closer look at our Omega chipset. Designed by PsiQuantum and manufactured at GlobalFoundries.

Introducing Omega, the first manufacturable chipset for photonic quantum computing. Featured today in @nature.com and designed by PsiQuantum & manufactured at GlobalFoundries, it contains all the photonic components required for million-qubit-scale quantum computers. www.nature.com/articles/s41...

Quantum Computing Is Closer Than Ever. Everybody’s Too Busy to Pay Attention. A technology that feels like it’s ‘always five years away’ may suddenly be two years away—but businesses are a little preoccupied.

“That has really been our approach … to leverage the same fabs, the same contract manufacturers, as far as humanly possible the same networking and so on that is used in conventional data centers, conventional supercomputers ... And we think that gives us a much faster path.”

DARPA has advanced PsiQuantum into the final phase of the Utility-Scale Quantum Computing program. We’re proud to continue our partnership with DARPA, whose history of supporting emerging technologies has shaped the world—think GPS, robotics, and self-driving cars. www.psiquantum.com/featured-new...

From lifesaving mRNA vaccine technology to foundational tech like GPS, self-driving cars, legged robotics, and the early internet, DARPA has defined the last several decades of technologies and is set to do so far into the future. www.darpa.mil/news/2025/qu... ​

We are proud to continue working alongside DARPA whose long history of backing transformational technologies is unparalleled.

Over 50 experts from DARPA’s test and evaluation team have exhaustively examined PsiQuantum’s technical approach, our detailed plans for fault-tolerant prototypes, and our long-term R&D plans, components, architectures, systems development, and application utility.

The Validation & Co-Design phase of the US2QC program, as part of the Quantum Benchmarking Initiative (QBI), marks a critical milestone on the roadmap to deliver an industrially useful quantum computer.