Oxford physicists reproduced the Aharonov-Bohm effect in a trapped-ion simulation of one gauge-theory loop built from two qubits and two oscillators. The simulated field was itself quantum and evolved with the matter, on a system far smaller than the lattices that strain classical computers.
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Christopher Monroe's Duke team simulated gluon string breaking on trapped ions and got results similar to earlier neutral-atom and superconducting work. The team found the break starts at the edges, contrary to Schwinger's predictions.
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Oxford physicists used a hybrid trapped-ion quantum computer to stop a simulated particle tunneling with a magnetic flux it never crossed. Their setup is one loop of two qubits and two oscillators, a first building block for simulations that get harder for classical machines as they grow.
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Universal Quantum, a University of Sussex spin-out, raised more than $100 million in a Series A co-led by DCVC and Firgun Ventures. The money goes into commercialising hardware at a company already delivering a $77 million contract for Germany's DLR, startup.eu reported.
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Duke-led physicists used 13 trapped ions to reproduce string breaking, in which a stretched bond between particles snaps and new pairs form. Two other teams saw similar physics on other hardware, though at this size any payoff for particle physics is still a forecast.
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String-breaking, the moment a stretched bond between two building blocks of matter snaps and new particles appear, has now been observed on a trapped-ion quantum simulator at Duke. Two other groups saw it on different hardware.
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IonQ researchers report a real-time error-correction decoder that added under 0.3% to runtime at a CNOT error rate of 10^-4, and under 12% at five times that rate, on workloads simulated against the company's own proposed architecture.
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A single trapped calcium ion has confirmed a years-old prediction that the strongest coupling point of a tightly focused laser sits off the beam axis, and the size of the displacement tracks wavelength alone.
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The algorithm-level numbers are the part of the estimate that can be recompiled onto any fault-tolerant machine, and the headline 25.7 days on 19,397 physical qubits belongs to the trapped-ion architecture its own authors proposed.
Publishers:iacr.org
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The Commerce award is the only contracted dollar figure Quantinuum put on the page, and the two onshore manufacturing partners it named, GlobalFoundries and Monarch Quantum, arrive without volumes, dates or contract values.
Publishers:quantinuum.com
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The EUR 21m machine holds ytterbium ions with electromagnetic fields and steers them with microwaves, and it arrives attached to Jülich's supercomputers rather than standing alone with a spec sheet.
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ETH Zurich scanned a tightly focused 729-nanometer beam across a nearly motionless ion and found the coupling peak sitting hundreds of nanometers to the side, by an amount that changes with the transition being driven.
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