A trapped-ion experiment makes swapping quantum motion continuously tunable
Two ion motional modes undergo a coherent exchange operation. The gate’s exponential name describes its mathematics, not a speed advantage.
Coherent
lasers; photonics; optical components and materials
United StatesIdentity & attribution
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- Coherent
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lasers; photonics; optical components and materials
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Classical Feedback Closed a Quadratic Gap in Stabilizer Learning
A new proof shows that adaptive single-copy measurements can learn an exact stabilizer state with the same linear copy scaling as joint Bell measurements, without coherent access to two copies at once.
Telecom Quantum Dot Keeps a Hole Spin Coherent for 21.8 Nanoseconds
Peer-reviewed measurements link a semiconductor hole spin to 1.55-micrometre photons, but this remains an interface experiment—not a network node.
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