New Civilization News: Trillions Entwined    
 Trillions Entwined
16 Nov 2001 @ 11:01, by sindy

CLOUDS OF ATOMS ARE LINKED BY A WEIRD QUANTUM YOKE


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Other recent entanglement milestones include:
In 2000 a group in Colorado entangled a line of four beryllium ions in a radio-frequency trap by sending a laser pulse through them. In principle, any number of ions could be entangled this way.
A group in France entangled rubidium atoms by passing them one at a time through a superconducting optical cavity and applying microwave pulses to entangle them with the light in the cavity.
This year a group in England used a process analogous to laser amplification to increase the production of entangled quartets of photons by a factor of 16--a first step toward producing a laser of entangled photons.

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