This is your Advanced Quantum Deep Dives podcast.

There’s no silence quite like the hum of a dilution refrigerator at dawn, the only sound a faint pulse as microwave signals wrangle qubits into alignment. Leo here—your guide for another Advanced Quantum Deep Dives. I’m stepping straight into today’s biggest development, because this weekend brought a seismic shift for quantum computing: Fujitsu announced the world’s first development plan for a superconducting quantum computer with more than 10,000 physical qubits, targeting 2030 as their finish line.

That’s a number so large, it’s almost abstract—unless, like me, you see quantum leaps everywhere, from financial markets to the shifting tectonic plates of global tech. Picture this: until now, most quantum computers in labs—those chilly, humming caverns—rarely crack a few hundred qubits. Fujitsu’s “STAR” architecture aims for 250 error-corrected, or logical qubits, in just five years, and ramps to 1,000 by 2035. But here’s what really sent a tingle up my spine: these aren’t just any qubits. This is a hybrid plan. Fujitsu will combine superconducting with diamond spin qubits, bringing together two of the most promising quantum modalities, in partnership with Japan’s National Institute of Advanced Industrial Science and Technology and RIKEN. Their first milestone? Scaling manufacturing, chip-to-chip networking, and error correction, all at once.

Let me break that down. A qubit—the quantum analog of a bit—holds both a 0 and a 1, and maybe even a cat if you’re feeling Schrodingerish. The real challenge isn’t just building a qubit, it’s protecting it. Quantum states are fragile, scattering into “classical” mush with the slightest interference. That’s why error correction—where many physical qubits reinforce a single logical qubit—is everything. Fujitsu’s STAR architecture is targeting industrial use cases, like materials science, where the quantum weirdness of electrons shapes everything from better batteries to new alloys. The implications? Imagine designing new drugs, optimizing power grids, or cracking problems considered impossible today, all in hours or minutes.

And today’s most captivating research? A new study out of Cambridge and Université Paris-Saclay has engineered a carbon-based molecule that directly connects quantum spin to light emission. The molecule actually glows different colors to display its quantum state—a shortcut for quantum readout that skips expensive sensors and opens entirely new routes to quantum sensors and communication. Here’s the surprise: quantum information, in this case, could be read by color, not code. As if your quantum device was giving you a light show—imagine that in tomorrow’s hospitals or encrypted networks.

Every breakthrough in this field feels like watching probability collapse into certainty—much as world events pivot on quantum unpredictability. Thanks for joining me, Leo, today. If you ever have burning questions or want certain topics dissected, email me at [email protected]. Subscribe to Advanced Quantum Deep Dives to never miss an episode. This has been a Quiet Please Production—head over to quietplease.ai for more.

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