Krishna explains why his Nature cover paper on quantum computing hardware requires two episodes rather than one. Episode 54 covers the theoretical foundations: what a qubit is, what a quantum algorithm is, and the countercultural origins of the field in the 1960s through 1980s, when researchers worked on quantum computing in their spare time with no formal research program. Episode 55 will cover the competing hardware approaches and the paper itself.
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The hardware landscape the second episode will cover includes trapped ions, neutral atoms, superconducting qubits, spin-based systems, and Majorana modes from Microsoft, the last of which Krishna says he is skeptical about.
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Krishna notes the quantum computing industry has grown from a niche academic curiosity to what he estimates is now a trillion-dollar-scale field, with some university physics departments devoting half their faculty to it.
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A stated goal of the two-part series is to dismantle hype, contrasting the scientific reality with how the word quantum is used in Marvel films as a catch-all for time travel, teleportation, and memory erasure.
Quantum ComputingQuantum InformationQuantum MechanicsCryptography