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Physics World

Two more quantum firsts

Published Apr 1, 2000• 0 citations
Publisher

Abstract

A quantum computer could, in principle, outperform a classical computer by many orders of magnitude for certain computational tasks. This is why quantum computation, and the whole area of quantum information, is the focus of an increasingly large research effort worldwide. Two recent experiments demonstrate the rapid rate of progress in the field: a group in the US has "entangled" four particles for the first time; while a collaboration between physicists in the UK and Italy has demonstrated "geometric quantum computation".

DOI
10.1088/2058-7058/13/4/1

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Researchers in Australia have boldly declared that they will produce a prototype building block for the world's first quantum computer within 12 months. Quantum computers would exploit the ability of a particle to be in two quantum states at the same time, allowing them, in principle, to outperform classical computers by many orders of magnitude in some operations. Staff at the Australian Centre for Quantum Computing Technology say that a device based on two quantum bits, or “qubits”, will be ready within a year. While groups in other countries are pursing different strategies, the Australian scientists are basing their research on silicon chips, which, they say, have the advantage of already being widely used in industry.