A team of scientists has revealed how a single quantum device can accurately measure the three fundamental units of electricity—the ampere (unit of electrical current), the volt (unit of electrical ...

THE lecturer began by observing that no real advance could be made in any branch of physical science until practical methods for a numerical reckoning of phenomena were established. The “scale of ...

Scientists carried out an experiment that realizes a new kind of quantum standard of resistance. It's based on the Quantum Anomalous Hall Effect. The precise measurement of electrical resistance is ...

Scientific American is part of Springer Nature, which owns or has commercial relations with thousands of scientific publications (many of them can be found at www ...

Scientific American is part of Springer Nature, which owns or has commercial relations with thousands of scientific publications (many of them can be found at www ...

For more than a century, scientists have relied on separate tools to measure the three core building blocks of electricity: ...

A prototype of a quantum resistance standard based on the quantum anomalous Hall effect with a disc magnet. (Courtesy: Y Okazaki) Researchers in Japan have proposed a new way of defining the standard ...