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Topic: Quantum teleportation


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  Quantum Teleportation
Quantum teleportation is similar to the far-fetched 'transporter' technology used in the television series 'Star Trek'.
This is the first time quantum teleportation has been performed with a high degree of 'fidelity', which means that the output reproduces the input with good accuracy.
Quantum teleportation was announced earlier last year by two independent labs in Europe, but the low-fidelity results achieved in these experiments could also be explained away by standard (classical) optics, without invoking teleportation at all.
www.studyoverseas.com /uk/uked/quantum.htm   (1611 words)

  
 quantum teleportation
The only form of teleportation that is currently a scientific reality and the only form of teleportation in which it is known that an absolutely perfect copy of the original is created.
Quantum teleportation, an outgrowth of quantum information science, enables the transfer of a quantum state to an arbitrarily distant location.
Because the physics if quantum teleportation is somewhat esoteric it may be useful to outline it in familiar terms.
www.daviddarling.info /encyclopedia/Q/quantum_teleportation.html   (953 words)

  
 QUANTUM PHYSICS: ON ATOM QUANTUM TELEPORTATION
Teleportation does demonstrate a number of fascinating fundamental properties of quantum theory, in particular the non-local property of entangled states, which allows the projective measurement of the source-ancilla pair to create a definite pure state in the target qubit.
Quantum teleportation is significant in several areas, including transmission of quantum states in noisy environments [1], sharing states in distributed quantum networks [3] and implementation of quantum computation using resources prepared offline [4,5].
Consider quantum teleportation of the state of one particle, which is initially entangled with a second particle, but the state of the second particle does not undergo quantum teleportation.
scienceweek.com /2004/sa040827-4.htm   (1168 words)

  
 Quantum Consciousness . Stuart Hameroff
The boundary between the quantum and classical worlds is unclear, and the transition between the two is commonly described as quantum state reduction, collapse of the wave function, or decoherence.
Early quantum experiments led to the conclusion that quantum superpositions persisted until measured or observed by a conscious observer, that "consciousness collapsed the wave function".
The theory of decoherence reconciles the Copenhagen interpretation with quantum superpositions in the absence of measurement or conscious observation.
www.quantumconsciousness.org /overview.html   (2321 words)

  
 Alternate View Column AV-62
An essential rule of the quantum world is that the state vector can never be completely known because no measurement can determine it completely (except in the special case that it has been prepared in some particular state or some member of a known "basis" group of states in advance).
There is a way around this quantum roadblock which exploits the peculiarities of EPR nonlocality to transmit the complete description of the state of a quantum system over nature's privileged communication channel without performing measurements that extract a complete description of the state vector as information.
For the teleported colonists no subjective time at all has passed, and they have had a perfectly safe trip because it was known that the receiver apparatus had arrived and was fully checked out before the transmission was made.
www.npl.washington.edu /AV/altvw62.html   (1769 words)

  
 Quantum Teleportation - Crystalinks
Teleportation is the name given by science fiction writers to the feat of making an object or person disintegrate in one place while a perfect replica appears somewhere else.
A teleportation machine would be like a fax machine, except that it would work on 3-dimensional objects as well as documents, it would produce an exact copy rather than an approximate facsimile, and it would destroy the original in the process of scanning it.
Until recently, teleportation was not taken seriously by scientists, because it was thought to violate the uncertainty principle of quantum mechanics, which forbids any measuring or scanning process from extracting all the information in an atom or other object.
www.crystalinks.com /teleportation.html   (833 words)

  
 Quantum Teleportation
Teleportation is the name given by science fiction writers to the feat of making an object or person disintegrate in one place while a perfect replica appears somewhere else.
A teleportation machine would be like a fax machine, except that it would work on 3 dimensional objects as well as documents, it would produce an exact copy rather than an approximate facsimile, and it would destroy the original in the process of scanning it.
A few science fiction writers consider teleporters that preserve the original, and the plot gets complicated when the original and teleported versions of the same person meet; but the more common kind of teleporters destroys the original, functioning as a super transportation device, not as a perfect replicator of souls and bodies.
members.fortunecity.com /conews/theories/quantum_teleportation.htm   (792 words)

  
 ScienceDaily: First Quantum Teleportation Between Light And Matter
Science Daily — The concept of quantum teleportation - the disembodied complete transfer of the state of a quantum system to any other place - was first experimentally realised between two different light beams.
To prove that quantum teleportation has been successfully performed, a second intense pulse of polarised light is sent to the atomic ensemble after 0.1 milliseconds and, so to speak, "reads out" its state.
"Quantum teleportation constitutes methods of communication for application in quantum cryptography, the decoding of data, and not new kinds of transportation", as Dr. Klemens Hammerer emphasizes.
www.sciencedaily.com /releases/2006/10/061005222238.htm   (1315 words)

  
 Quantum teleportation - Wikipedia, the free encyclopedia
In quantum information, quantum teleportation, or entanglement-assisted teleportation is a technique that transfers a quantum state to an arbitrarily distant location using a distributed entangled state and the transmission of some classical information.
Teleportation does not result in the copying of qubits, and hence is consistent with the no cloning theorem.
Quantum telecloning: Captain Kirk's clone and the eavesdropper
en.wikipedia.org /wiki/Quantum_teleportation   (1800 words)

  
 Physics News Graphics: Quantum Teleportation
In the quantum teleportation process, physicists take a photon (or any other quantum-scale particle), transfer its properties (such as its polarization, the direction in which its electric field vibrates) to another photon--even if the two photons are at remote locations.
Although no existing laws of physics prevent quantum teleportation from being carried out in humans and automobiles, it is extremely unlikely that this scheme could be carried out in such macroscopic objects, because the uniquely quantum properties (such as entanglement) that make teleportation possible quickly break down as objects scale up to the macroscopic sizes.
In this setup, teleportation is achieved 25% of the time, corresponding to the percentage of times in which the two photons travel off to two different detectors, a condition which necessitates the two photons to have complementary polarizations.
www.aip.org /png/html/teleport.htm   (713 words)

  
 Caltech Press Release, 10/22/1998, H. Jeff Kimble
In this sense, quantum teleportation is similar to the far-fetched "transporter" technology used in the television series Star Trek.
Teleportation of this kind was first proposed theoretically by IBM scientist Charles H. Bennett and colleagues in 1993.
Although quantum teleportation was recently announced by two independent labs in Europe, neither experiment achieved a fidelity that unambiguously required the use of quantum entanglement between Alice and Bob.
pr.caltech.edu /media/Press_Releases/PR11935.html   (880 words)

  
 NIST Demonstrates 'Teleportation' of Atomic States for Quantum Computing
The quantum state of an atom is a description of such things as its energy, motion, magnetic field and other physical properties.
Teleportation could increase computing speed and efficiency by linking distant zones within a computer so that data could be processed by physically separated quantum bits (or qubits, the quantum form of the digital bits 1 and 0).
The properties that were teleported included the “spin state” of the ion (up, down or a superposition of the two), and the “phase” (which has to do with the relative positions of the peaks and troughs of an ion’s wave properties).
www.nist.gov /public_affairs/releases/teleportation.htm   (814 words)

  
 Long distance quantum teleportation draws closer - quantum-world - 12 February 2003 - New Scientist
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.
But to be sure that the teleportation has taken place it has previously been necessary to measure the quantum state in the second photon.
This is above the accuracy theoretically needed to extend the use of quantum communication by the use of "quantum repeaters".
www.newscientist.com /channel/fundamentals/quantum-world/dn3384   (405 words)

  
 Advancing Quantum Information Science Unlocking Secrets
Teleportation could enhance the speed and efficiency of quantum computing by transferring data between distant qubits, or it could be a crucial step in detecting and correcting minor errors.
Teleportation has been compared to faxing in that it reconstructs a quantum state indirectly.
The NIST procedure teleports the quantum state of one beryllium ion to another ion.
www.nist.gov /public_affairs/quantum/beam_me_up.html   (440 words)

  
 Teleporting Matter's Traits: Beaming information quantum-style: Science News Online, June 19, 2004   (Site not responding. Last check: 2007-11-01)
That feat of quantum teleportation, reported independently by teams in Austria and the United States in the June 17 Nature, moves scientists nearer to building a class of so-called quantum computers that's expected to be astonishingly speedy at certain tasks, such as scouring databases for specific information.
Starting in the early 1980s, physicists have realized that aspects of quantum mechanics—the physics of minuscule specks of matter and energy such as atoms and photons—could be exploited to greatly improve some types of computing and communications.
By means of a choreographed sequence of laser pulses, the scientists in each group set the stage for teleportation by tweaking one of the three ions so that it would have a particular quantum state and by entangling the second and third ions.
www.sciencenews.org /articles/20040619/fob1.asp   (691 words)

  
 Quantum Teleportation
We have implemented quantum teleportation with light beams serving as both the entangled pair and the input (and output) state.
Quantum teleportation is theoretically perfect, yielding an output state which equals the input with a fidelity F=1.
The quantum nature of the teleportation achieved in this case is demonstrated by the experimentally determined fidelity of F=0.58, greater than the classical limit of 0.5 for coherent states.
www.cco.caltech.edu /~qoptics/teleport.html   (532 words)

  
 Open-destination Quantum Teleportation
The physicists also demonstrated what they call 'open-destination teleportation,' a way to teleport quantum information within and between computers." "They teleported the unknown quantum state of a single photon onto a superposition of three photons.
Quantum teleportation is akin to faxing a document and in the process destroying the original.
Teleportation is a potential method of transferring information within quantum computers, and can also eventually be used to transport information among quantum networks.
radio.weblogs.com /0105910/2004/08/29.html   (644 words)

  
 First quantum teleportation between light and matter
The concept of quantum teleportation - the disembodied complete transfer of the state of a quantum system to any other place - was first experimentally realised between two different light beams.
teleportation if there is ever such a thing would be the moving of an object from point a to b in its entirity via a transmission medium.
The scientists had obtained quantum information from fiber glass of 800 meters of length, a canal of the Danube river the being crossed transversally and covering a distance of 600 meters, published in 20 of August in the scientific magazine British "Nature".
www.physorg.com /news79265847.html   (1346 words)

  
 Quantum "teleportation"
If you can accept this, then Quantum "teleportation" shouldn't be so hard to accept and understand.
Since everyone, and everybody, and their uncle are cheering about the 'teleportation' effect of this experiment, nobody seems to understand at least one practical use.
Quantum Mechanics According to Cramer by Donald R. Tveter
www.geocities.com /grymse/quantum.html   (670 words)

  
 Quantum Teleportation
Quantum teleportation was first conceived by an international group of researchers in 1993.
Quantum cryptography is an extension of quantum communication in that it sends particles using quantum teleportation.
Particles are enconded in quantum states and are sent to the receiver as in quantum communication.
www.zamandayolculuk.com /cetinbal/QUANTUMTELEPORTb.htm   (1352 words)

  
 Quantum entanglement - Wikipedia, the free encyclopedia
Quantum entanglement is a quantum mechanical phenomenon in which the quantum states of two or more objects have to be described with reference to each other, even though the individual objects may be spatially separated.
Quantum entanglement is closely concerned with the emerging technologies of quantum computing and quantum cryptography, and has been used to experimentally realize quantum teleportation.
The correlations predicted by quantum mechanics, and observed in experiment, reject the principle of local realism, which is that information about the state of a system should only be mediated by interactions in its immediate surroundings.
en.wikipedia.org /wiki/Quantum_entanglement   (2046 words)

  
 First Quantum Teleportation Made Between Light and Matter   (Site not responding. Last check: 2007-11-01)
The aim of the research in teleportation is not to develop a new method of transportation, but to develop the future's quantum commnication network, which will be based on teleportation of information.
The target of teleportation is a cloud of Cesium atoms (glowing in the centre) enclosed in a cell surrounded by magnetic field installations.
To prove that quantum teleportation has been successfully performed, a second intense pulse of polarized light is sent to the atomic ensemble after 0.1 milliseconds and "reads out" its state.
photonics.com /content/news/2006/October/10/84671.aspx   (1178 words)

  
 Quantum Teleportation
The dream of teleportation is to be able to travel by simply reappearing at some distant location.
By producing pairs of entangled photons by the process of parametric down-conversion and using two-photon interferometry for analysing the entanglement, we could transfer a quantum property (in our case the polarization state) from one photon to another.
Quantum teleportation is featured in the April 2000 issue of Scientific American.
www.quantum.univie.ac.at /research/photonentangle/teleport/index.html   (181 words)

  
 Quantum Teleportation
In March 1993 Charles H. Bennett from IBM proposed a scheme, based on Quantum Mechanics, that in principle could be used to teleport an object.
Thus, the Quantum Teleportation is similarly independent of the distance.
Teleporting the polarization state of a single photon a quarter of the time is a long long way from reliably teleporting Captain Kirk.
www.upscale.utoronto.ca /GeneralInterest/Harrison/QuantTeleport/QuantTeleport.html   (2307 words)

  
 Quantum teleportation useless to teleport humans - Pravda.Ru
Teleportation is an instant transportation of an object from one place to another.
The interconnection of objects on the quantum level is similar to the interconnection of physical objects and phenomena.
Unfortunately, the quantum teleportation is useless to teleport humans from one location to another.
english.pravda.ru /science/19/94/379/14789_teleportation.html   (621 words)

  
 Newsguy - Feature Writers - TechCorner - Quantum Teleportation
Teleportation is something you would expect to hear in an episode of Star Trek, so the news that a group of scientists in Australia have successfully teleported a laser beam is undoubtedly a cause for excitement.
When you first hear of scientists talking about teleportation, you immediately think of the Star Trek series, and according to Dr. Ping Koy Lam, the leader of this project, the experiment is similar to the teleporting of people that is achieved in the ever popular science fiction series.
In fact, teleportation has been an oft discussed topic among physicists in quantum mechanics in the past decade, and became a very sought after process since the IBM lab, in 1993, provided a theoretical foundation for the work.
member.newsguy.com /features/techcorner.htm   (476 words)

  
 Quantum Teleportation to Quantum Thought: Psychism is now real Science
Quantum Teleportation is a somewhat mindboggling concept, but it's really not all that hard to explain philosophically.
The researchers who first demonstrated this Quantum Teleportation effect are associated with IBM and they intend to use this as a new form of communication in order to build super powerful quantum computers.
In fact, the possibility of Quantum Teleportation is one of the big reasons why Einstein himself had ideological problems with quantum theory.
paganastrology.com /web/articles/quantumthought.html   (2650 words)

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