If even a single photon comes in and interacts with our qubit, you've lost it. You've broken the coherence of the entangled qubits that you started with. And there's a lot of photons out there in the universe. Everything around us is glowing because it has a temperature. That's why you need to build a quantum computer at a really, really, really low temperature. But what really strikes me about quantum computer builders like Michelle is that they don't spend a lot of time worrying about the weirdness of the quantum world. The mysteries of quantum mechanics are not something that I consider every day. I see it as really just a hardcore engineering challenge.
In this episode, Tech Tonic dives into the science at the heart of quantum computing. How do technologists use unexplained subatomic phenomena to build powerful computers?
FT artificial intelligence editor Madhumita Murgia tells the story of quantum physics with the help of Sean Carroll, a theoretical physicist at Johns Hopkins University and hears from University of New South Wales professor Michelle Simmons to understand how engineers exploit weird quantum physics.
Presented by Madhumita Murgia and John Thornhill, produced by Josh Gabert-Doyon and Edwin Lane. Executive producer is Manuela Saragosa. Sound design by Breen Turner and Samantha Giovinco. The FT’s head of audio is Cheryl Brumley.
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