Teleporting electrons for game of quantum ping pong

Teleporting electrons between two points on a wire is just the kind of high end juggling act that deserves some applause. And since it is also the latest nifty trick being hailed as the “first major step on the road to building a quantum computer”, it is the kind of trick worth mentioning here. It is certainly a double demo of a fundamental requirement of quantum computing: control of the position of a single electron. Two groups of researchers have shown, independently, that it is possible to trap and repeatedly transport a single electron from one point on a wire to another. This extremely fine control over the behaviour of the most fundamental part of electronics has been described as “an enabling technology” for quantum computers, particularly in transferring qubits between the processor and memory on a quantum chip. The scientists, based at French National Centre for Scientific Research and the University of Cambridge in the UK, report their results in two separate papers, published in Nature. Both teams began by isolating and confining a single electron on a quantum dot. They then used sound waves to transport the electron to a second quantum dot. In France, the researchers showed… Read full this story

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