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A team of Harvard physicists built the first-ever quantum computing machine that can operate continuously without restarting, achieving a major breakthrough in a field that could revolutionize everything from medical research to finance.
For years, most quantum computers could only run for milliseconds, and even advanced machines that could run longer would operate for just around 13 seconds. But the Harvard team was able to run their system for more than two hours last month — and several of the researchers said the machine could, in theory, run indefinitely.
"There is still a way to go and scale from where we are now, but the roadmap is now clear based on the breakthrough experiments that we've done here at Harvard," said Tout T. Wang, a research associate who works in the lab that designed the machine.
Researchers from INSAIT, ETH Zurich, and the University of Oxford developed qblaze, a quantum circuit simulator that efficiently handles large-scale sparse quantum systems on conventional computers.
The simulator organizes quantum data as sorted arrays of non-zero values, enabling faster, cache-efficient computation and nearly linear scaling across 180 CPU cores—up to 120 times faster than previous sparse simulators.
In benchmarks, qblaze factored a 39-bit number using Shor's algorithm with just two CPUs and is open-source, offering a scalable platform for testing quantum algorithms in realistic settings.
