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TIME AND SPACE
UCLA physicists develop world's best quantum bits
by Staff Writers
Los Angeles CA (SPX) May 19, 2020

Eric Hudson, UCLA professor of physics and astronomy.

A team of researchers at UCLA has set a new record for preparing and measuring the quantum bits, or qubits, inside of a quantum computer without error. The techniques they have developed make it easier to build quantum computers that outperform classical computers for important tasks, including the design of new materials and pharmaceuticals. The research is published in the peer-reviewed, online open-access journal, npj Quantum Information, published by Nature and including the exceptional research on quantum information and quantum computing.

Currently, the most powerful quantum computers are "noisy intermediate-scale quantum" (NISQ) devices and are very sensitive to errors. Error in preparation and measurement of qubits is particularly onerous: for 100 qubits, a 1% measurement error means a NISQ device will produce an incorrect answer about 63% of the time, said senior author Eric Hudson, a UCLA professor of physics and astronomy.

To address this major challenge, Hudson and UCLA colleagues recently developed a new qubit hosted in a laser-cooled, radioactive barium ion. This "goldilocks ion" has nearly ideal properties for realizing ultra-low error rate quantum devices, allowing the UCLA group to achieve a preparation and measurement error rate of about 0.03%, lower than any other quantum technology to date, said co-senior author Wesley Campbell, also a UCLA professor of physics and astronomy.

The development of this exciting new qubit at UCLA should impact almost every area of quantum information science, Hudson said. This radioactive ion has been identified as a promising system in quantum networking, sensing, timing, simulation and computation, and the researchers' paper paves the way for large-scale NISQ devices.

Research paper


Related Links
University Of California - Los Angeles
Understanding Time and Space


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TIME AND SPACE
The Space Station's coolest experiment gets astronaut-assisted upgrade
Pasadena CA (JPL) May 13, 2020
NASA's Cold Atom Laboratory, a facility for fundamental physics experiments on the International Space Station, recently underwent a major hardware upgrade with the help of astronauts Christina Koch and Jessica Meir. By chilling atom clouds to just above absolute zero - the lowest temperature matter can reach - Cold Atom Lab enables scientists to directly observe unique atomic behaviors, helping answer questions about how our world works at the smallest scales. The new hardware will dramatically expand ... read more

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