Single-Atom transistor provides base towards Quantum Computers, as researchers from University of New South Wales, University of Melbourne and Purdue University under supervision by Professor Michelle Simmons, director of the ARC Centre for Quantum Computation and Communication at the University of New South Wales has developed a tiny electronic device, in which an isolated Phosphorous atom placed accurately on a silicon base between two electrodes with the help of scanning tunneling microscope (STM) which helps them to see and give accuracy for atoms handling at the base of the crystal inside an ultra-high vacuum chamber. as an electric current supplied by collector to gate controller device it allows to function as an amplifier or a switch, Atom was perfectly placed at desired location, while this type of single-atom transistor were developed previously but had an error of ten nanometers in placing atom in an appropriate location, which affects on the result.
Professor Michelle Simmons says it is the first time “anyone has shown control of a single atom in a substrate with this level of precise accuracy. Several groups have tried this, but if you want to make a practical computer in the long-term you need to be able to put lots of individual atoms in,” she added. “Then you find the separation between the atoms is quite critical so you need to have atomic precision to do that, so then you can also bring electrodes in to address each of those individual atoms.” “So here we are in 2012 and we’ve made a single-atom transistor about 8-10 years ahead of where industry is going to be.”