Researchers Build Pathway to Quantum Computers Using Single-Atom Spins
(FoxNews) In 1961, scientist and Nobel Laureate Nicolaas Bloembergen had suggested that the nucleus of a single atom could be controlled using only electric fields. Now, the engineers at the University of New South Wales Sydney have achieved just that.
“This discovery means that we now have a pathway to build quantum computers using single-atom spins without the need for any oscillating magnetic field for their operation,” said Andrea Morello, UNSW’s scientia professor of quantum engineering, in a statement. “Moreover, we can use these nuclei as exquisitely precise sensors of electric and magnetic fields, or to answer fundamental questions in quantum science.”
The researchers were originally attempting to perform magnetic resonance on a single atom of the chemical element antimony. “However, once we started the experiment, we realized that something was wrong. The nucleus behaved very strangely, refusing to respond at certain frequencies, but showing a strong response at others,” said Dr. Vincent Mourik, also a lead author on the paper, in a statement. “This puzzled us for a while, until we had a ‘eureka moment’ and realized that we were doing electric resonance instead of magnetic resonance.”
The discovery could pave the way to “scalable, nuclear- and electron-spin-based quantum computers in silicon that operate without the need for oscillating magnetic fields,” according to the paper.