\u201cIf we want to make a quantum computer, we need to be able to read information out of the quantum bits very quickly,\u201d said\u00a0Jon Simon<\/a>, the study\u2019s senior author and\u00a0the Joan Reinhart Professor in Stanford\u2019s\u00a0School of Humanities and Sciences<\/a>. \u201cUntil now, there hasn\u2019t been a practical way to do that at scale because atoms just don\u2019t emit light fast enough, and on top of that, they spew it out in all directions. An optical cavity can efficiently guide emitted light toward a particular direction, and now we\u2019ve found a way to equip each atom in a quantum computer within its own individual cavity.\u201d<\/p>\n A light has emerged at the end of the tunnel in the long pursuit of developing quantum computers, which are expected to radically reduce the time needed to perform some complex calculations from thousands of years down to a matter of hours.<\/p>\n A team led by Stanford physicists has developed a new type of \u201coptical cavity\u201d that can efficiently collect single photons, the fundamental particle of light, from single atoms. These atoms act as the building blocks of a quantum computer by storing \u201cqubits\u201d\u00a0\u2013 the quantum version of a normal computer\u2019s bits of zeros and ones. This work enables that process for all qubits simultaneously, for the first time.<\/p>\n In a study published in\u00a0Nature<\/a>, the researchers describe an array of 40 cavities containing 40 individual atom qubits as well as a prototype with more than 500 cavities. The findings indicate a way to ultimately create a million-qubit quantum computer network.<\/p>\n \u201cIf we want to make a quantum computer, we need to be able to read information out of the quantum bits very quickly,\u201d said\u00a0Jon Simon<\/a>, the study\u2019s senior author and\u00a0the Joan Reinhart Professor in Stanford\u2019s\u00a0School of Humanities and Sciences<\/a>. \u201cUntil now, there hasn\u2019t been a practical way to do that at scale because atoms just don\u2019t emit light fast enough, and on top of that, they spew it out in all directions. An optical cavity can efficiently guide emitted light toward a particular direction, and now we\u2019ve found a way to equip each atom in a quantum computer within its own individual cavity.\u201d<\/p>\n Researchers estimate a quantum computer will require millions of qubits to outperform classical supercomputers. Reaching that number will likely mean networking many quantum computers together, Simon said. The achievement in this study of using cavities to create a parallel interface makes a highly efficient platform for scaling to these large sizes.<\/p>\n The team demonstrated a 40-cavity array containing atoms in this paper with a proof-of-concept array with more than 500, and the researchers are aiming toward tens of thousands. Looking ahead, they imagine quantum data centers where individual quantum computers each have a network interface consisting of a cavity array, enabling large-scale integration into quantum supercomputers.<\/p>\n Reaching that goal will require solving some major engineering challenges, but the potential is there, the researchers contend, and with it, all the promise of quantum computing. This could mean major advances in materials design and chemical synthesis, such as that used for drug discovery, as well as in code breaking. More broadly, the light-collection capabilities of the cavity arrays hold great promise for biosensing and microscopy, which could advance medical and biological research. Quantum networks could even help better understand space, by enabling optical telescopes with enhanced resolution that would allow direct observation of planets outside our solar system.<\/p>\n \u201cAs we understand more about how to manipulate light at a single particle level, I think it will transform our ability to see the world,\u201d Shaw said.<\/p>\n![\"\"](\"https:\/\/www.newsbeep.com\/us\/wp-content\/uploads\/2026\/01\/SimonLab296-1024x683.jpg\")
Cavity Array Microscope in the Simon Lab, Department of Physics and Applied Physics, Stanford School of Humanities and Sciences, , at Stanford, California on Thursday, September 18, 2025. (Photo by LiPo Ching)<\/p>\n
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