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Someday, when someone — not me — writes the history of the quantum industry, Quantinuum will likely emerge as one of its defining chapters.

It seems like only yesterday that I was posting press releases from a scrappy startup in the U.K. called Cambridge Quantum. At the time, I was only a few weeks into my own role at an even scrappier startup, struggling to explain what a qubit is, make entanglement sound less like magic, and translate some of the most counterintuitive — oh, heck — the weirdest science ever conceived into something approaching plain English.

Of course, some of you will correctly point out that this struggle continues to this day for me.

During that time, Ilyas Khan, Cambridge Quantum’s visionary founder, became a friend and mentor, letting me know when I got it right and — trust and believe — not letting me off the hook when I got it wrong.

Just as vividly, I remember when Honeywell threw its hat into the quantum ring and thinking that its entry brought a new level of legitimacy to the sector. Honeywell, with its longstanding reputation for engineering excellence, was not a company that chased technological fads.

Maybe we are onto something, I thought.

When Honeywell and CQ merged, it was a complete no-brainer.

Now that partnership — the startup mindset meets industrial scale — has made its way to the public market.

Listing on Nasdaq is not just good for Quantinuum, but, somewhat counterintuitively, prove beneficial for the broader quantum sector as well. Let me explain.

The companies in this still scrappy emerging industry are, of course, competitors. They are vying for customers, talent, investment and technological leadership. But they are also collectively working to overcome larger challenges, such as building awareness, demonstrating commercial value and establishing the legitimacy of quantum technologies in the eyes of the public, investors, policymakers and enterprise buyers.

For now, the industry's success is not a zero-sum game. Progress by one company can help create opportunities for others by attracting capital, attention and confidence to the sector as a whole.

Like a rising tide entering the harbor, Quantinuum's arrival on the public markets has the potential to lift the entire fleet.

Quantum.Tech World is 5 weeks away!

Join 1,000+ leaders from across quantum, AI, HPC and cybersecurity, alongside all 17 U.S. DOE National Laboratories, for two days of technical insights, enterprise case studies and industry-defining conversations.

With 150+ speakers, seven stages, breakfast briefings, technology showcases and roundtables, this is where the organizations building, funding, securing and deploying the future of computing come together.

Premium passes have already sold out. A limited number of complimentary Expo Passes remain available, but they won't last much longer.

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The Noteworthy & Nuanced

— Alan Kanapin, Analyst at The Quantum Insider

A joint team from Cleveland Clinic and IBM demonstrated a hybrid quantum-classical workflow to model the electronic structure of the 303-atom Trp-cage protein using IBM’s Heron r2 processor. The approach combines wave function-based embedding to break the protein into manageable clusters with quantum sampling techniques to solve complex interactions. This quantum-centric supercomputing method overcomes limits of classical simulation and could scale to larger biomolecules, supporting drug discovery and advanced molecular research.

Atom Computing and Cisco have signed an agreement to explore distributed quantum computing by linking neutral-atom quantum systems through quantum networks. The collaboration will integrate Atom’s hardware with Cisco’s networking stack, including compilers and protocols, to tackle challenges such as interconnects, transduction, and distributed workload execution. The effort aims to enable scalable architectures by connecting multiple quantum processors into unified, networked systems.

QpiAI has developed a hardware-based quantum error correction decoder that significantly reduces latency in superconducting systems. Using a union-find algorithm on its 64-qubit Kaveri processor, the platform cuts correction time from tens of microseconds to about 1.5 microseconds. This enables real-time error correction within qubit coherence limits, a key requirement for scalable fault-tolerant quantum computing, and marks progress toward practical, high-performance quantum machines.

The Research Rundown

— Cierra Choucair, Journalist & Analyst at The Quantum Insider

Check out this week’s handpicked quantum research. These are studies headed for real-world impact: improving accuracy, reducing latency, using fewer resources, or solving problems that classical methods struggle with. These are early developments, but they hint at where quantum might earn its keep.

Quantum Headlines

Hot on the heels of the U.S. federal government’s announcement of major investment into the quantum industry, other countries, states, and companies are devoting significant budget toward quantum technology, incorporating it into their bigger national strategies. The race for quantum is heating up, as geopolitical use cases emerge.

— Krista Elliott, Journalist at The Quantum Insider

Quantinuum will begin trading on the Nasdaq after raising $1.68 billion in an IPO that implies a valuation in the neighborhood of $14 billion to $15 billion, making it one of the most significant public market debuts in the quantum computing sector to date.

A UK survey commissioned by D-Wave found that 65% of large enterprises are already adopting or testing quantum computing, and 41% estimate it could generate more than £100 million in value within a year.

Oxford Quantum Circuits (OQC) raised an oversubscribed £260 million ($350 million) Series C round, the largest private funding round for a European quantum computing company, to support global expansion and development of fault-tolerant quantum systems.

The QScale project, led by VTT with Tampere University and Aalto University, has received funding from Business Finland to develop technologies aimed at improving the energy efficiency and scalability of quantum computers.

IQM secured an additional PIPE investment commitment from Ilmarinen, increasing funding beyond the previously announced $134 million PIPE tied to its planned merger with SPAC partner Real Asset Acquisition Corp. and public listing.

Quobly has raised €115 million (about $134 million USD) in a Series A round to accelerate the industrialization of its silicon-based quantum computing platform and launch its first cloud-accessible commercial system by the end of 2026.

Hear from 120+ global leaders at Commercialising Quantum

Join more than 1,100 global leaders in science, industry, and policy at Commercialising Quantum Global to examine the global landscape: where leadership is emerging, what kind of collaboration is essential and how organisations can remain competitive.

Confirmed speakers include:

Other News:

Join us at Europe's largest quantum event.

If you allocate capital, set strategy, or shape policy, Commercialising Quantum Global 2026 (June 16–17, London) is built for you. 

With many platforms competing, the risk of choosing the wrong one is increasing. This event brings together investors, companies, and public-sector leaders to evaluate which technologies are advancing, what evidence is reliable, and how others are refining their strategies.

Attend to gain a clearer understanding of where to commit resources and where to be cautious, reducing the risk of poor investment decisions.

➡️ Microsoft reported a more than 1,000-fold increase in the stability of its topological qubits using a new processor called Majorana 2, with quantum-state lifetimes extending beyond 20 seconds and occasionally exceeding one minute.

➡️ The results represent one of the strongest engineering demonstrations yet for Microsoft's long-running topological quantum computing program, a strategy the company argues could ultimately support large-scale, fault-tolerant quantum computers with millions of qubits.

➡️ Majorana 2 replaces aluminum with lead in the device's superconducting structures and introduces a redesigned semiconductor stack, changes that more than doubled the topological gap protecting quantum states and dramatically improved qubit stability.

➡️ The announcement arrives under significant scrutiny because Microsoft's Majorana-based approach has been debated for years, and last year's Majorana 1 announcement generated criticism and skepticism within the physics community over the evidence supporting the exotic quantum states at the heart of the architecture.

➡️ Unlike many competing quantum systems, Microsoft's design stores information in electron parity and performs computations largely through measurements rather than direct manipulation of quantum states, an approach intended to simplify scaling and error correction but one that remains highly complex and technically challenging.

➡️ Despite the reported progress, the current device remains a prototype rather than a commercially useful quantum computer, and significant work remains to hit Microsoft’s roadmap’s endpoint of 2029.

Commentary:

Few quantum computing stories generated as much fascination — or as much skepticism — as Microsoft's pursuit of topological quantum computing.

The company's latest announcement may not fully settle that debate, but it does provide what could be the strongest evidence yet that its unconventional approach is making tangible engineering progress.

For nearly two decades, Microsoft has pursued a quantum computing architecture built around Majorana zero modes, exotic quantum states that many physicists view as potentially capable of protecting quantum information from errors. The promise is alluring. If successful, topological qubits could require far less error correction than conventional approaches, potentially making large-scale quantum computers easier to build.

The challenge is that the underlying physics is extraordinarily difficult.

Unlike superconducting, trapped-ion, photonic or neutral-atom systems that dominate much of today's quantum industry, Microsoft's architecture depends on creating, measuring and controlling quantum states that are not directly observed in everyday materials. As a result, proving that the devices are behaving as intended has become almost as important as building them.

That reality helps explain why last year's Majorana 1 announcement attracted such intense scrutiny. Critics questioned whether the available evidence fully supported Microsoft's interpretation of the observed quantum behavior. Supporters argued the company was making steady progress toward a fundamentally different type of quantum computer.

The latest Majorana 2 results are somewhat changing the conversation around the technology. Rather than focusing primarily on proving the existence of Majorana states, Microsoft is emphasizing device performance. The reported increase in parity lifetimes from milliseconds to tens of seconds — and occasionally beyond one minute — is difficult to ignore if the measurements hold up under broader examination. Likewise, the more than doubling of the topological gap suggests meaningful progress in suppressing the types of errors that have historically limited these devices.

Still, investors and industry observers should be careful not to confuse an important scientific milestone with a finished commercial product.

Topological quantum computing remains among the most technically ambitious approaches in the field. The architecture involves specialized materials, intricate semiconductor-superconductor structures and measurement-based control systems that differ significantly from those used by most competitors. Every step toward scalability introduces new engineering challenges.

The significance of Microsoft's announcement therefore lies less in the immediate performance of a prototype device and more in what it suggests about the viability of the broader roadmap.

If the company can continue translating materials-science improvements into longer-lived qubits, more reliable measurements and scalable error correction, the topological approach could eventually emerge as a serious contender in the race toward fault-tolerant quantum computing.

That remains an "if" — we can’t deny this.

Yet after years of debate over whether Microsoft's topological strategy would ever demonstrate practical progress, Majorana 2 gives both supporters and critics something more concrete to evaluate. And in a field where many long-term promises remain largely theoretical, that alone may be one of the most important developments.

PacketLight Networks and NEC demonstrated quantum key distribution over a 400G dense wavelength division multiplexing (DWDM) network using a dual-fiber setup. They integrated NEC’s QKD system with PacketLight’s PL-4000M 600G Muxponder, achieving 100% data throughput and low latency, verified via a 100GbE tester. The QKD ran over a dedicated parallel fiber, maintaining quantum signal integrity. The result: a cost-effective, scalable quantum-safe model with zero performance tradeoffs on existing high-capacity infrastructure.

June 8 -- WISER Quantum and AI Program 2026 begins, focusing on optimization at the intersection of quantum and AI.

June 8-12 -- London Tech Week will take place at Olympia London.

June 10-11 -- Perspektywy Women in Tech takes place in Warsaw, Poland and is the largest conference for women in technology in Europe. This year’s event features Quantum Dreams, a quantum technology track.

June 16 -- France Quantum -- the premier event showcasing the French Quantum ecosystem to the world.

June 22-24 -- IQT Nordics: Oslo, Norway

June 25-26 -- Quantum.Tech World -- Empowering Quantum, AI & HPC at Enterprise -- Scale, co-located with Quantum.Tech World will be held at Encore Boston Harbor in Boston, United States.

July 1-3 – The 2026 IEEE International Conference on Quantum Control, Computing, and Learning (IEEE qCCL 2026) will take place from Wednesday to Friday, July 1-3, 2026

September 15 –Quantum Leap Career Nexus 2026 will take place at the University of Maryland.

Editor: Matt Swayne

Contributors: Cierra Choucair, Alan Kanapin, Krista Elliott