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Phosphorous
makes quantum memory
A combination of microwaves and radio waves transfers information from an easily controlled but short-lived electron quantum bit to a phosphorous nucleus embedded in a silicon chip. The information lasts for more than a second -- a longtime for quantum computing -- and can be transferred back to the electron.
The technique brings chip-based quantum computers a step closer. Quantum computers have the potential to crack today's security codes and carry other tasks beyond the reach of today's computers.
Research paper:
Solid-State Quantum Memory Using the 31P Nuclear Spin
Nature, October 23, 2008
Researchers' homepages:
John J. L. Morton
Richard M. Brown
Brendon W. Lovett
Arzhang Ardavan
Thomas Schenkel
Eugene E. Haller
Joel W. Ager
S. A. Lyon
Related stories and briefs:
Positioned atoms advance quantum chips -- precursor research
Further info:
How It Works -- Quantum computing: qubits -- overview of quantum bits
Back to TRN October 27/November 3, 2008
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