More accurate ions

   April 28/May 5, 2008
A prototype quantum computer made from a pair of trapped ions achieves a fidelity of 99.3 percent for logic operations involving entangling the two quantum bits. The performance is a key step toward reaching the 99.99 percent fidelity required for practical quantum computing. Quantum computers promise to be much faster than ordinary computers for certain tasks like cracking secret codes.

Research paper:
Towards Fault-tolerant Quantum Computing with Trapped Ions
Nature Physics, published online April 27, 2008

Researcher's homepage:
Quantum Optics and Spectroscopy Group, University of Innsbruck

Related stories and briefs:
Teleport lifts quantum computing
Quantum bit hangs tough
How It Works: Quantum computing: qubits


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