You're here: My Science Blogging » Discovery » Article: Quantum Communications Reached 144 km
Koen — June 4, 2007 / 11:53 pm
Nature Physics reported: a quantum communication has been sent across a record 144 km.
The 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 researchers mentioned that the entangled photons behave like psychic twins: even if they are far apart, a disturbance to one affects the other. This is the oddity that Albert Einstein famously dubbed as spooky interaction. This process may one day be used to send secret messages across space via a network of satellites.
In the experiment, polarisation-entangled photon pairs were generated on Roque de los Muchachos, a mountain observatory on the island of La Palma in Spain’s Canary Islands. While one photon stayed in La Palma, its twin was sent over an optical free-space link to Tenerife about 144 kilometres away, where the Optical Ground Station of the European Space Agency acted as a receiver. It was a marked improvement over the 13-km distance achieved earlier in a similar.
They described their experiment as an essential first step towards future satellite-based quantum communication and experiments on quantum physics in space.
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Kuncoro++ » Babak Baru Komunikasi Kuantum
[…] “AsiaBlogging melaporkan: teleportasi kuantum telah berhasil dicoba pada jarak 144 km. Teleportasi macam ini menggunakan dua partikel pada kondisi kuantum yang berpasangan. Pada saat kedua partikel dipisahkan, secara kuantum mereka masih berpasangan. Jika salah satu partikel kondisi kuantumnya diubah, secara ajaib kondisi kuantum partikel pasangannya berubah, dimanapun ia berada. Teorinya seperti itu, dan hal semacam ini amat tak disukai Einstein dan banyak ilmuwan lainnya. spooky interaction, kata mereka. Tetapi ternyata untuk jarak dekat, interaksi ini berhasil teramati. Dan kini berhasil juga pada jarak 144 km. […]
June 7th, 2007 at 1:51 pm
The Pragmatic Programmer : Quantum Communications Reached 144 km
[…] this can be use to teleporting human. Posted: Saturday, June 09, 2007 6:40 PM by […]
June 10th, 2007 at 1:41 am