Maser is ‘major step’ towards quantum computing systems

January 16, 2015 5:52 AM

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The original aim of the project was not to build a maser, but to explore how to use double quantum dots as quantum bits. Because quantum dots can communicate through the entanglement of light particles, or photons, the researchers designed dots that emit photons when single electrons leap from a higher energy level to a lower energy level to cross the double dot.

Each double quantum dot can only transfer one electron at a time, said Jason Petta, an associate professor of physics. "It is like a line of people crossing a wide stream by leaping onto a rock so small that it can only hold one person," he said. "They are forced to cross the stream one at a time. T...

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