Alice & Bob

Classical computers solve most problems faster. But for certain classes of very complex problems, only quantum will make them possible. ⚛️ Right now, the most powerful classical supercomputers can exactly simulate about 60 qubits. 🖥️ A few exceptions exist for some edge cases, but quantum simulations will be, by and large, a playground for quantum computers. 🔮 We explored all this and more with Alice & Bob's Juliette Peyronnet and Bob Sorensen from Hyperion Research, hosted by insideHPC’s Doug Black. Here’s a taste of what we dug into: 🔷 The idea of “quantum heuristics”, meaning how user experimentation on real devices may lead to creative new methods and shortcuts, just like we saw in the early days of classical computing. 🔷 How quantum is set to impact up to 50% of scientific computing workloads, according to national labs’ own studies. 🔷 Why high performance computing teams need to start designing quantum-classical applications now alongside quantum players to stay competitive into the quantum era. It’s a great entry point to key ideas in our report, also with Hyperion Research, on the future of quantum and high-performance computing. ⚛️🖥️ 🎧 Watch the full conversation: https://lnkd.in/eZfZdFXe 📝 Read our report: 👉 https://lnkd.in/eFDHZGnG #QuantumComputing #HPC #FutureOfComputing

We’re back in the kitchen with NVIDIA 🔥, but this time it's in their kitchen. We’re proud to support the launch of NVQLink, announced yesterday by Jensen Huang on stage at #NVIDIAGTC Washington. NVQLink tackles a big challenge in quantum computing: integrating the best of classical with the cutting edge of quantum error correction. ⚡ This is all about perfect orchestration, pun intended, classical GPUs and quantum processors working hand-in-hand, each playing to their strengths in a single seamless workflow. 🤝 That’s what NVQLink is set to achieve: 1️⃣ Live calibration – qubits drift, all the time, requiring constant fine-tuning. GPUs step in to process the calibration data in real time, keeping qubits reliable and measurements accurate. 2️⃣ Error decoding – quantum systems produce errors constantly. GPUs are perfectly suited to interpret these incoming errors, so QPUs can correct them. 3️⃣ Logical orchestration – fault-tolerant computing depends on the precise timing of calibrations, measurements, and corrections. Classical GPUs choreograph these operations, ensuring the whole system works together as it should. You might remember we are already cooking with NVIDIA to speed up QPU simulations with our Dynamiqs and CUDA-Q integration. 🚀 Now, with NVQLink, we’re taking classical-quantum integration even further: building the workflows that will turn qubits from lab experiments into the foundations of real-world, fault-tolerant quantum computers. ⚛️🖥️ Stay tuned for more! #QuantumComputing #NVIDIA #HybridComputing

Is FTQC dead? 🤔 No, FASQ is the next step in FTQC. A new landmark paper by field giants Jens Eisert and John Preskill, creator of the term NISQ, hits us with a new acronym: FASQ, Fault-tolerant Application Scale Quantum Computing. FASQ marks the moment when quantum computers become capable of running useful applications for the world. The paper outlines 4 steps for a quantum computers to enter the FASQ era. 🚀 This is an Alice & Bob digest and, as usual, we simplified things a lot, but in a nutshell: 1️⃣ Today’s quantum computers can run a set of operations and at best give you an ex-post “summary” of the errors they made. Tomorrow’s FASQs need to detect and correct errors automatically and as they happen to never stop an algorithm and always give the right result. ⚙ 2️⃣ Today’s quantum computers can run small error-corrected circuits (hundreds of qubits at best) and still settle for pretty unreliable results, but tomorrow’s FASQ will have to reach orders of magnitude lower error rates and hundreds of thousands of physical qubits. 📈 3️⃣ As quantum computers get more complex, we need to have verifiable algorithms, meaning those we can cross-check to confirm that they did what they were supposed to. ✅ 4️⃣ For now, quantum computers remain experimental tools. The most useful thing they do right now is help us build their next iteration. A lot of fun for us, but not necessarily relevant for the rest of the world. To reach FASQ, we need to achieve credible quantum advantage, meaning a result that is useful and beyond what any classical computer can do. 🎯 The authors also talk about hardware-efficient approaches, mentioning cat qubits. 🐈⬛ As they put it: “It might pay off to make the physical qubits more complicated if (this) makes it easier to realize logical qubits...” Cat qubits ”strongly suppress bit-flip error rates…potentially reducing the overhead cost of error correction.” At Alice & Bob, we are aiming to create the best logical qubits by building our entire architecture on cat qubits. ⚡ We strongly agree with the paper's outlook. Early FTQC is a necessary step, but it's not the endgame on the journey of making quantum computers fault-tolerant and application-ready. 🖥️⚛️ Quantum is evolving at breakneck speed, and with FASQ it’s going to get a whole lot more exciting. 🔥 #QuantumComputing #FTQC #FASQ #CatQubits

Qubits are only as good as the materials we build them from. That’s why we’re teaming up with PLASSYS BESTEK, specialists in thin film deposition tech, to take our quantum chip fabrication capabilities to the next level. 🚀🛠️ As part of the ULTRACAT project 🐈⬛, supported by the French Government’s Agence de l'innovation de défense, PLASSYS-BESTEK’s chip fabrication equipment SQUID-6 UHV will soon be installed in our upcoming €50M lab in Paris. ⚛️ SQUID-6 UHV is a new state-of-the-art deposition system, capable of processing multiple wafers, the shiny discs of sapphire we build our QPUs on, in series. This unique tool was developed and built by PLASSYS-BESTEK for Alice & Bob in a world-first. The SQUID-6 core creates ultra-high vacuum conditions. Around this core independent chambers host tools that can perform different nanofabrication processes without contaminating the others. This marvel of engineering allows us to produce more QPUs, at a higher quality, faster. 💎⚡ What we care about at Alice & Bob is producing high-fidelity qubits at scale. To do that we need the best fabrication technologies to test our chip designs at breakneck speed and with minimal variability, and this is what the ULTRACAT project and this collaboration with PLASSYS-BESTEK is all about. On another note, we can’t thank the French Government enough, and specifically the Agence de l'innovation de défense and DGA - Direction générale de l'armement for their continuous commitment in supporting the whole quantum value chain, a testament to how building a sovereign technological future happens through action. 🇫🇷 #QuantumComputing #QuantumHardware #QuantumLab #Physics

Quantum still has to prove itself. Many in the quantum world (including us!) think we will see useful applications of quantum computing by 2030. But experts in classical computing are not so easily convinced. 🤔 Last week, Laurent Prost and Rémi de La Vieuville joined the HPC User Forum, where Rémi took to the stage to explore quantum for HPC, before more of the Alice & Bob team continued the exchange at our after-event. We had many fruitful discussions where our enthusiasm met some grounded skepticism. With current quantum computers being capable of so little, and with investment in classical computing capabilities reaching record highs, can quantum really change the game in just five short years? 🕰️ Of course, the revolution will not happen overnight, and it will not affect every field. But with quantum error correction solving the shortcomings of current quantum computers, we project about half of today’s HPC workloads could benefit from quantum computing in the early 2030s. 📊 Getting there means quantum and HPC working side-by-side, where quantum expertize meets HPC know-how. 🤝 The future lies in hybrid quantum-classical workflows — and these workflows will need to be co-designed. Quantum computers also need to fit into existing HPC environments, adapting to decades of established ways of working. ⚙ Hitting technological milestones on time is just part of the equation. Unlocking the full potential of early quantum computing requires close collaboration as quantum technology evolves. ⚛️ It was an enriching exchange, a chance to understand each other’s challenges and explore how our worlds can come together — to the tune of some live jazz. 🎷 Here’s to the next one. 📝 Dive deeper in our report: 👉 https://lnkd.in/eFDHZGnG #HPCUserForum #HPC #QuantumComputing #FutureOfComputing Photo credits: Anna Ellouk

🔥 Alice & Bob featured in the Top 20 Startups in France by LinkedIn! 🇫🇷 Five years ago, we were a handful of PhD students obsessed with physics and passionate about cats 🐈⬛. Today we’re 150 people building what could become the first useful quantum computer by 2030. ⚛️🖥️ The Top 20 Startups list is based on community engagement, so we feel especially proud to make it on there. 🙌 And we’re just getting started. We’re hiring 100 new teammates by mid-2026. If you’ve ever wondered about quantum, there’s never been a better time to jump in. 👇 🚀 Join us: alice-bob.com/join-us 📰 Read the news: https://lnkd.in/gT9n3Tp3 #LinkedInTopStartups #QuantumComputing #Physics #Hiring

Cecile M. Perrault of Alice & Bob has made Sifted’s 100 Women in Tech in Europe 2025! 🌟 This first edition, curated with STATION F and SISTAFUND, recognizes female tech leaders in Europe — from founders to policymakers to journalists and corporate leaders — who are making a real impact and deserve to be celebrated. 🚀 As our Head of Innovation and Partnerships, Cécile is driving quantum tech from the lab to the real world. This year she was also elected Vice President of the European Quantum Industry Consortium (QuIC), helping to strengthen European competitiveness on the global stage. ⚛️ In the office, Cécile is always that one spotting what’s next, and somehow already making it happen! ✨ It’s great to see quantum spotlighted, and we’re proud to see Cécile celebrated among other inspiring leaders. Big congrats to Cécile! 👏 See the full list: https://lnkd.in/dbKmZCGF #WomenInTech #Leadership #Policy #TechDiplomacy #Europe #France

🧬 What if we could finally simulate some of the most complex molecules out there? ✨ Today, some essential molecules remain a mystery, because the information required to simulate them grows faster than classical computers could ever compute. 🌀🧮 That’s where quantum computing comes in. ⚛️🖥️ Yet, we must first build and scale quantum computers powerful enough to run the algorithm… 📝 In our latest resource estimation, we show that cat qubits could simulate two of quantum chemistry’s benchmark problems, P450 and FeMoco, with far fewer physical qubits than other superconducting architectures. 🐈 🔍  Fewer qubits doesn’t just mean more efficient machines, it could make impactful, large-scale quantum chemistry applications a reality sooner. 🎨 See our infographic below for an explainer. ✍️ Read our latest blogpost for a deep-dive: 👉 https://lnkd.in/egVNu9r5 And this is just the start… we expect to bring down this estimate even further soon. Stay tuned! #QuantumComputing #QuantumChemistry #Innovation #CatQubits

Superconducting tech just reached Nobel Prize status! 🏅 John Clarke, Michel H. Devoret, and John M. Martinis, the founding fathers of superconducting circuits, have been awarded The 2025 Nobel Prize in Physics! 🌟 Their pioneering experiments made today’s quantum computers possible, proving that quantum mechanical effects like tunnelling and quantized energy can be applied to macroscopic systems. ⚡ Their work started it all, not only paving the way for using superconducting circuits to build quantum computers, but showing that electrical circuits in general could be quantum devices, creating a profound impact on our field. 🔬 We’re proud that John M. Martinis is a scientific advisor at Alice & Bob, while Michel H. Devoret, who advised Alice & Bob in our early days, co-founded the Quantum Electronics Group at Ecole normale supérieure in the late 2000s, alongside Benjamin Huard — the very group that would give birth to Alice & Bob a few years later.💡 Devoret also co-invented the cat qubit, the foundation of our approach at Alice & Bob. 🐱 This recognition celebrates the impact of superconducting technology on our understanding of quantum physics, and its promise for turning practical quantum computing into a reality. ⚛️💻 A huge congratulations to Clarke, Devoret, and Martinis for their immense contributions. An inspiring day for our field! 👏 #NobelPrize2025 #Physics #QuantumComputing

Quantum physics often feels mysterious and complex 😮💨 … but not this Sunday! 🥳 If you’re in Paris (or nearby), bring the family along to the Fête de la Science at Ecole normale supérieure(ENS) Physics Laboratory. From 10h to 18h, Alice & Bob will be hosting fun, hands-on activities to make the mysteries of quantum accessible to everyone — from middle schoolers to lifelong learners. 🌀 ENS has shaped some of the world’s greatest scientific minds, and we’re excited to walk the same corridors as Joseph Fourier, Louis Pasteur and Emile Durkheim, while sharing our passion for quantum.✨ 👨👩👧👦 Doors are open to all — parents, kids, students, and the simply curious. Come explore, play, and discover quantum made simple! 📍 45 rue d’Ulm (Fête de la Science @ ENS Physics Lab) 📅 5th Oct, Sunday, 10h to 18h 👋 À bientôt! #ENS #Quantum #ScienceForAll #ParisEvents #QuantumMadeSimple