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Nature 438, 431-432 (24 November 2005) | doi:10.1038/438431a; Published online 23 November 2005
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Quantum computing: A bit chilly
Leonard J. Schulman1
Abstract
A quantum computer needs a constant supply of 'qubits' in a known state. A nuclear magnetic resonance experiment that cools qubits by pumping entropy into a heat bath is a step closer to that goal.
On page 470 of this issue, Baugh et al.1 demonstrate progress on one item in a long list of requirements for a functional quantum computer2, 3 — ensuring a continuous supply of the basic carriers of quantum information (quantum bits, or qubits) in known states. The experiment was small-scale, involving just three qubits and slight cooling to prepare them, but it potentially shows the way to preparing larger numbers of qubits in well-defined states.
- Leonard J. Schulman is at the California Institute of Technology, 1200 East California Boulevard, MC 256-80, Pasadena, California 91125, USA.
Email: schulman@caltech.edu
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