University of New South Wales (UNSW) researchers have led an international team in placing an electron in a nano-sized device on a silicon chip in two different ways. The techniques are breakthroughs that represent a key step in the development of quantum computing. The team reports that it accurately placed a single electron in silicon, adding that it was not attached to an atom. The researchers call the artificial atom a quantum dot, and note that they did not have to place single atoms in precise locations in a silicon chip. The researchers also report they were involved in another project in which “nature’s own way,” or binding electrons to single atoms, was used to place electrons in a silicon chip. The research lays the foundation for efforts to observe and then control the electron’s spin to create a quantum bit. UNSW professors Andrew Dzurak and Andrea Morello worked with Ph.D. students Wee Han Lim and Kuan Yen Tan, University of Melbourne professor David Jamieson, and Helsinki University of Technology professor Mikko Mottonen on the projects.
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