Showing posts with label teleportation. Show all posts
Showing posts with label teleportation. Show all posts

2011-04-18

Quantum Teleportation Breakthrough

Fox News - Fair & Balanced

Quantum Leap: Scientists Teleport Bits of Light - FoxNews.com


Physicists used this complex lab setup to teleport quantum packets of light from one place to another.


Our world is getting closer to "Star Trek" every day
.
Scientists announced Wednesday they've been able to teleport special bits of light from one place to another -- "Beam me up, Scotty," in other words. The advance doesn't necessarily mean we'll ever be able to teleport people, unfortunately, but it does represent some pretty mind-bending physics.





Quantum teleportation - Wikipedia, the free encyclopedia

Quantum teleportation, or entanglement-assisted teleportation, is a process by which a qubit (the basic unit of quantum information) can be transmitted exactly (in principle) from one location to another, without the qubit being transmitted through the intervening space. It is useful for quantum information processing, however it does not immediately transmit classical information, and therefore cannot be used for communication at superluminal (faster than light) speed. It also does not transport the system itself, and does not concern rearranging particles to copy the form of an object.


Teleportation


 [...] in quantum teleportation, two objects B and C are first brought into contact and then separated. Object B is taken to the sending station, while object C is taken to the receiving station. At the sending station object B is scanned together with the original object A which one wishes to teleport, yielding some information and totally disrupting the state of A and B. The scanned information is sent to the receiving station, where it is used to select one of several treatments to be applied to object C, thereby putting Cinto an exact replica of the former state of A.
Collected from: Teleportation





Quantum Teleportation Is a Reality - PCWorld

[...] the researchers developed a "broadband, zero-dispersion teleportation apparatus" and a whole new set of "hybrid protocols involving discrete- and continuous-variable techniques in quantum information processing for optical sciences,"[...]
The research was led by University of Tokyo researchers from the Department of Applied Physics, with some intercontinental assistance from the Centre for Quantum Computation and Communication Technology at the University of New South Wales.



University of New South Wales, Sydney, AustraliaUNSW: The University of New South Wales - Sydney Australia - News - Quantum teleporter breakthrough 


"One of the limitations of high-speed quantum communication at present is that some detail is lost during the teleportation process. It’s the Star Trek equivalent of beaming the crew down to a planet and having their organs disappear or materialise in the wrong place. We’re talking about information but the principle is the same – it allows us to guarantee the integrity of transmission. 
"Just about any quantum technology relies on quantum teleportation. The value of this discovery is that it allows us, for the first time, to quickly and reliably move quantum information around. This information can be carried by light, and it’s a powerful way to represent and process information. Previous attempts to transmit were either very slow or the information might be changed. This process means we will be able to move blocks of quantum information around within a computer or across a network, just as we do now with existing computer technologies. 
"If we can do this, we can do just about any form of communication needed for any quantum technology."




2011-01-18

Quantum Entanglement Allows Time Teleportation

arXiv blog

New Type Of Entanglement Allows 'Teleportation in Time,' Say Physicists

Conventional entanglement links particles across space. Now physicists say a similar effect links particles through time.

To see how, imagine an experiment that Ralph and Olson describe in which a qubit is sent into the future. The idea is that a detector acts on a qubit and then generates a classical message describing how this particle can be detected. Then, at some point in the future, another detector at the same position in space, receives this message and carries out the required measurement, thereby reconstructing the qubit.

But there's a twist. Olson and Ralph show that the detection of the qubit in the future must be symmetric in time with its creation in the past. "If the past detector was active at a quarter to 12:00, then the future detector must wait to become active at precisely a quarter past 12:00 in order to achieve entanglement," they say. For that reason, they call this process "teleportation in time".

Time travel - Wikipedia, the free encyclopedia

Time travel is the concept of moving between different points in time in a manner analogous to moving between different points in space, either sending objects (or in some cases just information) backwards in time to some moment before the present, or sending objects forward from the present to the future without the need to experience the intervening period (at least not at the normal rate).

Although time travel has been a common plot device in fiction since the 19th century, and one-way travel into the future is arguably possible given the phenomenon of time dilation based on velocity in the theory of special relativity (exemplified by the twin paradox), as well as gravitational time dilation in the theory of general relativity, it is currently unknown whether the laws of physics would allow backwards time travel.
Any technological device, whether fictional or hypothetical, that is used to achieve time travel is commonly known as a time machine.


Quantum entanglement - Wikipedia, the free encyclopedia

Quantum entanglement is a property of the quantum mechanical state of a system containing two or more objects, where the objects that make up the system are linked in such a way that the quantum state of any member of the system cannot be adequately described without full mention of the other members of the system, even if the individual objects are spatially separated. Quantum entanglement is at the heart of the EPR paradox that was described by Albert Einstein, Boris Podolsky, and Nathan Rosen in 1935, and it was experimentally verified for the first time in 1972 by Stuart Freedman and John Clauser[1].


Quantum teleportation - Wikipedia, the free encyclopedia

Quantum teleportation, or entanglement-assisted teleportation, is a technique used to transfer quantum information from one quantum system to another. It does not transport the system itself, nor does it allow communication of information at superluminal (faster than light) speed. Neither does it concern rearranging the particles of a macroscopic object to copy the form of another object. Its distinguishing feature is that it can transmit the information present in a quantum superposition, useful for quantum communication and computation.


2010-06-10

Long Range Quantum Teleportation

Teleportation: Yes, It’s Finally Here


According to a report by Discovery News, Chinese scientists have managed to ‘teleport” information almost ten miles (16 kilometres) by using what is called “quantum entanglement.”



... a short animation that attempts to make sense of quantum mechanics and the method of quantum teleportation




Beam Me Up, Scotty! Scientists Teleport Info 10 Miles

We may never be able to teleport ourselves "Star Trek"-style, but scientists managed to transmit information a record distance using entangled photons.

THE GIST
  • Scientists manage to teleport information nearly 10 miles with unprecedented precision.
  • The team used quantum entanglement to teleport the information.
  • The feat could lead to a global, impenetrable communication network and powerful quantum computers.

Quantum teleportation achieved over 16 km


a, A birds-eye view of the 16-km free-space quantum teleportation experiment. Charlie sends photon 1 to Alice for BSM. Classical information, including the results of the BSM and the signal for time synchronization, is sent through the free-space channel with photon 2, to Bob, before decoding and triggering of the corresponding unitary transformation. b, Sketch of the experimental system. See the original paper for more details. Image copyright: Nature Photonics, doi:10.1038/nphoton.2010.87

The experiments confirm the feasibility of space-based , and represent a giant leap forward in the development of applications.
The paper is available in full online at Nature Photonics.
More information: Xian-Min Jin, Experimental free-space quantum teleportation, Nature Photonics, Published online: 16 May 2010. doi:10.1038/nphoton.2010.87



Sources
Teleportation: Yes, It’s Finally Here – IndyPosted
http://indyposted.com/26123/teleportation-yes-its-finally-here/
YouTube - "Quantum Teleportation" by Phil Magnini
http://www.youtube.com/watch?v=_qmSdC7aQpY
Beam Me Up, Scotty! Scientists Teleport Info 10 Miles : Discovery News
http://news.discovery.com/tech/teleportation-quantum-mechanics.html
Quantum teleportation achieved over 16 km
http://www.physorg.com/news193551675.html

Related
Researchers Achieve Quantum Teleportation Over 10 Miles of Empty Space | Popular Science
http://www.popsci.com/science/article/2010-05/researchers-achieve-quantum-teleportation-over-10-miles
Quantum Teleportation Achieved Across 10 Miles
http://gizmodo.com/5543923/quantum-teleportation-achieved-across-10-miles?utm_source=feedburner&utm_medium=feed&utm_campaign=Feed:+gizmodo/full+%28Gizmodo%29&utm_content=Google+Reader
LinkNotes: Long-Distance Teleportation Achieved
http://rj3sp.blogspot.com/2009/01/long-distance-teleportation-achieved.html
Experimental free-space quantum teleportation : Abstract : Nature Photonics
http://www.nature.com/nphoton/journal/v4/n6/abs/nphoton.2010.87.html
Quantum teleportation - Wikipedia, the free encyclopedia
http://en.wikipedia.org/wiki/Quantum_teleportation
Quantum entanglement - Wikipedia, the free encyclopedia
http://en.wikipedia.org/wiki/Quantum_entanglement
HowStuffWorks "Entanglement and Recent Experiments"
http://science.howstuffworks.com/teleportation1.htm

2009-01-24

Long-Distance Teleportation Achieved

Clipped from: FOXNews.com - Scientist Teleport Matter More Than Three Feet - Science News | Science & Technology | Technology News

FOX News.com

Scientist Teleport Matter More Than Three Feet

Scientists have come a bit closer to achieving the "Star Trek" feat of teleportation.

No one is galaxy-hopping, or even beaming people around, but for the first time, information has been teleported between two separate atoms across a distance of a meter — about a yard.

Clipped from: Quantum Teleportation Is a Go! | 80beats | Discover Magazine

Quantum Teleportation Is a Go!




Researchers have accomplished teleportation, though not of the “Beam me up, Scotty” variety. Instead, they sent information between two individual atoms of the element ytterbium, which were suspended in separate containers three feet apart. Because the quantum information instantly hops from one atom to the other without ever crossing the space between the two, scientists call the transfer “teleportation” [Science News].

Over the years, teleportation experiments have demonstrated that quantum states - for example, the spin of a particle or the polarization of a photon - can be teleported using a variety of methods. But the researchers behind the latest experiment … claim that this is the first time information has been teleported between two separate atoms in unconnected enclosures [MSNBC].

Clipped from: Long-Distance Teleportation Between Two Atoms Achieved :: University Communications Newsdesk, University of Maryland
University of Maryland

Long-Distance Teleportation Between Two Atoms Achieved




Clipped from: University of Maryland Trapped Ion Quantum Computing Group

Prof. Christopher Monroe's research group at the University of Maryland Department of Physics and Joint Quantum Institute



[...] focuses on the electromagnetic manipulation of individual atoms
and photons for fundamental studies of quantum mechanics and applications in quantum information science.


Related:

FOXNews.com - Scientist Teleport Matter More Than Three Feet - Science News | Science & Technology | Technology News

Quantum Teleportation Is a Go! | 80beats | Discover Magazine

University of Maryland Trapped Ion Quantum Computing Group

Long-Distance Teleportation Between Two Atoms Achieved :: University Communications Newsdesk, University of Maryland

Quantum Leap: Information Teleported between Ions at a Distance: Scientific American

Technology Review: A Quantum Memory Leap

One quantum leap - Cosmic Log - msnbc.com

Teleportation Milestone Achieved | LiveScience

Quantum TQuantum Technologies Move A Step Closer With Demonstration Of An 'Entanglement' Filtereleportation Between Distant Matter Qubits: First Between Atoms 1 Meter Apart

Quantum Teleportation Between Distant Matter Qubits -- Olmschenk et al. 323 (5913): 486 -- Science