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QuEra sells neutral-atom machines with 256 and 260 physical qubits, while Harvard and MIT teams that include its co-founders have run arrays of more than 3,000 atoms. Its Libra computer, due in 2028, is the test.
QuEra said Libra will be available on Amazon Braket starting in 2028 and called the machine's specifications projected. Neither QuEra's release nor AWS's blog post gave the number of physical qubits the neutral-atom machine will use.
A quantum computer runs on clocks from nanoseconds to hours. IBM and Xanadu both drew their software layers along those clocks. A buyer still cannot swap one vendor's processor, controller or decoder for another's by recompiling.
Thirteen IBM researchers laid out how quantum processors should share schedulers, networks, and security controls with CPUs and GPUs. They described early installations at RIKEN and RPI. Tighter coupling and fully co-designed systems remain proposals.
The partners built Q-PAC from a QuantWare processor with 17 physical qubits and other suppliers' electronics, refrigeration, and software. They said it went from concept to full operation in five months. They released no gate error rates or benchmark results.
