Physicists at The Australian National University (ANU) and University of Queensland (UQ) have produced near-perfect clones of quantum information using a new method to surpass previous cloning limits.

A global race is on to use quantum physics for ultra-secure encryption over long distances according to Prof Ping Koy Lam, node director of the ARC Centre of Excellence for Quantum Computation and Communication Technology (CQC2T) at ANU.

The new cloning method uses high performance optical amplifiers to clone light encoded with quantum information —it is possible this technique could allow quantum encryption to be implemented with existing fibre optic infrastructure.

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