Open-air quantum teleportation performed across a 97km lake
2012 08 15

By Matthew Francis | ARSTechnica

Sending signals through fiber optic cable is reliable and fast, but because of internal absorption and other effects, they will lose photons—which is a problem when the number of photons being sent is small. This is of particular concern in quantum networks, which typically involve a small number of entangled photons. Direct transmission through free space (vacuum or air) experiences less photon loss, but it’s very difficult to align a distant receiver perfectly with the transmitter so that photons arrive at their destination.


Photo illustration of the beacon laser, used to track an entangled photon signal across Qinghai Lake. The statue is Padmasambhava at the Lotus Temple at Gangcha.


A group in China has made significant progress toward solving that problem, via a high accuracy pointing and tracking system. Using this method, Juan Yin and colleagues performed quantum teleportation (copying of a quantum state) using multiple entangled photons through open air between two stations 97 kilometers apart across a lake. Additionally, they demonstrated entanglement between two receivers separated by 101.8km, transmitted by a station on an island roughly halfway between them.

Though the authors do not make this clear in the paper, their method is currently limited to nighttime communication. Nevertheless, their results achieved larger distances for multi-photon teleportation and three-point entanglement than before, and the tracking system used may even enable ground-to-satellite quantum communication—at least if it happens at night.

Quantum communication requires transmitting an arbitrary quantum state between two points, similar to how ordinary communication sends bits (voice or other data) across distances. However, a quantum state is a small amount of information, typically carried by a single photon, so many methods used in ordinary communication are out of the question (including broadcasting).

[...]

Read the full article at: arstechnica.com





Padmasambhava - Wikipedia:


Padmasambhava (Means The Lotus-Born), was a sage guru from Oddiyāna who is said to have transmitted Vajrayana Buddhism to Bhutan and Tibet and neighboring countries in the 8th century.

He is considered an emanation of Buddha Amitabha and traditionally even venerated as "a second Buddha".

Padmasambhava said:

My father is the intrinsic awareness, Samantabhadra. My mother is the ultimate sphere of reality, Samantabhadri. I belong to the caste of non-duality of the sphere of awareness. My name is the Glorious Lotus-Born. I am from the unborn sphere of all phenomena. I act in the way of the Buddhas of the three times.



Statue of Padmasambhava 123 ft. (37.5 m) high in mist overlooking Rewalsar Lake, Himachal Pradesh, India.






Related Articles
Padmasambhava
Chinese Physicists Reportedly Break Teleportation Record
Scientists Teleport Light
Teleporting Light: A Breakthrough in Quantum Computing (Video)
DNA molecules can ’teleport’, Nobel Prize winner claims
Researchers Achieve Quantum Teleportation Over 10 Miles of Empty Space


Latest News from our Front Page

Recent Israeli Synagogue Attack, a Possible False Flag?
2014 11 21
Dear Friends - I woke up yesterday morning to see a newspaper lying on the kitchen table with the front page proclaiming that five people were slain in an Israeli synagogue after a so-called "Palestinian attack." Some members of the media said that four people were killed, others said five, so it seems like that there was some confusion (or ...
The Michael Brown Shooting, Race Baiting for Political Power and Militarization of the Police
2014 11 21
From Youtube: The evidence clearly shows that Officer Darren Wilson was justified in shooting Michael Brown, so why is this case being hyped by the mainstream media and the leftist political establishment?
Detekt: A New Malware Detection Tool That Can Expose Illegitimate State Surveillance
2014 11 21
Recent years have seen a boom in the adoption of surveillance technology by governments around the world, including spyware that provides its purchasers the unchecked ability to target remote Internet users’ computers, to read their personal emails, listen in on private audio calls, record keystrokes and passwords, and remotely activate their computer’s camera or microphone. EFF, together with Amnesty International, ...
New UK spy chief says tech giants aid terrorism, privacy not ‘absolute right’
2014 11 21
Robert Hannigan, the new head of GCHQ The new head of Britain’s GCHQ, the UK equivalent of the NSA in the U.S., said he believes privacy is not an absolute right and that tech giants must open themselves up to intelligence agencies. “GCHQ is happy to be part of a mature debate on privacy in the digital age,” Hannigan said. “But privacy ...
LOL: Atheist Feminist Pornographer Used as Moral Authority in T-shirt Row
2014 11 21
Dr. Matt Taylor was thrust into the headlines this last week, largely for his lead role in successfully landing a spacecraft on a comet 300 million miles from earth that travels at a speed of 85,000 mph. In short, Taylor and his colleagues pulled off one of the most amazing achievements in contemporary science and space exploration, and in a ...
More News »