New distance record for quantum communication (4)

1 Name: Click for Article : 2007-06-16 01:38 ID:PJLPlUI/

Cool.

"A quantum communication has been sent across a record 144 kilometres (90 miles) using a process which may one day be used to send secret messages across space via a network of satellites.

Quantum teleportation involves "entangling" two particles so that any change to the state of one also occurs instantly in its twin, wherever it may be.

The researchers entangle a pair of photons and then fire a single photon at one of the pair. The resulting interaction changes the state of both entangled photons, effectively teleporting a quantum bit of information - known as a qubit - from one place to another.

The entangled photons behave "like psychic twins", the researchers say: even if they are far apart, a disturbance to one affects the other - an oddity that Albert Einstein dubbed "spooky interaction.""

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