Researchers show how to directly observe quantum spin effects

current-induced-spin
Schematics of spin-dependent photovoltage generation and experimental setup. a Schematic of the device structure with bias current Jc applied along the x direction. The laser is focused on the device with normal incidence. b Optical image of the device with a representation of the electrical connections. Scale bar is 50 µm. The scanning area is indicated by a yellow box. The induced photovoltage is acquired by a lock-in amplifier.

With companies like Google, Microsoft and IBM all racing to create the world’s first practical quantum computer, scientists worldwide are exploring the potential materials that could be used to build them. Now, Associate Professor Yang Hyunsoo and his team from the Department of Electrical and Computer Engineering at the National University of Singapore (NUS) Faculty of Engineering have demonstrated a new method which could be used to bring quantum computing closer to reality.

“The NUS team, together with our collaborators from Rutgers, the State University of New Jersey in the United States and RMIT University in Australia, showed a practical way to observe and examine the quantum effects of electrons in topological insulators and heavy metals which could later pave the way for the development of advanced quantum computing components and devices,” explained Assoc Prof Yang.

The findings of the study were published in the scientific journal Nature Communications in June 2018. The advantage of quantum computers Quantum computers are still in the early stages of development but are already displaying computing speeds millions of times faster than traditional technologies. As such, it is predicted that when quantum computing becomes more readily available, it will be able to answer some of the world’s toughest questions in everything from finance to physics.

Read more: Researchers show how to directly observe quantum spin effects

thumbnail courtesy of news.nus.edu.sg