https://aiscience.uk/tags/neutral-atoms/ Recent content in Neutral-Atoms on AI Science Report Hugo en-us Thu, 16 Jul 2026 00:00:00 +0800 https://aiscience.uk/posts/two-hour-atom-cryogenic-neutral-atom-platform/ Thu, 16 Jul 2026 00:00:00 +0800 https://aiscience.uk/posts/two-hour-atom-cryogenic-neutral-atom-platform/ <p>If you want to build a quantum computer out of individual atoms suspended in laser light, you have to solve an annoying problem. The atoms keep falling out.</p> <p>Not literally falling. They escape the optical tweezers that hold them in place, knocked loose by stray gas molecules drifting through the vacuum chamber. The longer you need to keep your atoms trapped (to sort them into neat arrays, to run error correction, to actually compute something), the more of them you lose. And as quantum processors grow from hundreds to thousands to tens of thousands of qubits, this problem gets worse fast.</p> <p>A team at the Max Planck Institute for Quantum Optics (MPQ) in Garching, Germany just published a solution that is almost embarrassingly straightforward: they pointed a refrigerator at the problem.</p> <p>In a paper posted to arXiv on July 14, Max Melchner, Immanuel Bloch, Johannes Zeiher and colleagues report a neutral-atom platform that keeps individual strontium-88 atoms trapped in optical tweezers for more than two hours. That is a record for any system with full optical access. The secret is a commercially available cryostat whose cold tip, chilled to 4 Kelvin, sits about 30 centimeters away from the atoms and silently pumps away the hydrogen gas that would otherwise knock them out of their traps.</p>