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Presented by,VISHNU.M.G.K

L7

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` A bility of moving matter from one point toanother instantaneously.

` Involves dematerializing an object at onepoint, sending the details of that objects toanother location & Recreate it.

` Mainly Two types Visual & physicalteleportation.

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` Visual Teleportation is the 21st century alternative to travel.

` Teleportec communications system is designed to enable a life-size image of a

person to appear within a 3D environmentx make eye contact with individuals, use props and hold true two-way

conversationsx 80% of communication is non-verbal.

` N etworks like INTERNET-2 are employed.

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` Video conferencing has never presented itself as a realisticalternative to face-to-face meetings.

` Teleportation allows a more natural form of conversation due to the lack of latency

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` H ow this is accomplished is usually not explained in detail,but the object is scanned in such a way as to extract all theinformation from it.

` A teleportation machine would be like a fax machine, exceptthat it would work on 3-dimensional objects as well asdocuments.

x it would produce an exact copy rather than an approximate

facsimilex it would destroy the original in the process of scanning it.x A few science fiction writers consider teleporters that

preserve the original.

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` An experiment confirms that teleportation is possible atleast for photons .

x

C aptain Kirk and his crew do it all the time with thegreatest of ease: they discorporate at one point andreappear at another.

x Until recently, physicists had all but ruled out teleportation,in essence because all particles behave simultaneously

like particles and like wavesx Under H eisenberg uncertainty principle of quantum

mechanics, it is impossible to ever measure wave andparticle properties at the same time

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` In 1993, though, an international team of six scientists

proposed a way to make an end-run around theuncertainty principle.` Their solution was based on a theorem of quantum

mechanics dating to the 1930s called the Einstein-Podolsky-Rosen effect .

` when two particles come into contact with one another,they can become, "entangled.

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` In 1993, C harles Bennett (IBM, TJ Watson ResearchC

enter) and colleagues theoretically developed amethod for quantum teleportation.

x "Quantum teleportation involves the utter destruction of an unknown physical entity and its reconstruction at a

remote location," says Professor H . Jeff Kimble

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` Researchers force a photon of light to project its unknown stateonto another photon, with only a miniscule amount of informationbeing sent between the two.

` This is the first time quantum teleportation has beenperformed with a high degree of 'fidelity.

` Quantum teleportation was announced earlier last year by

two independent labs in Europe.` In the October 23 1998 issue of Science, the physicists

described how they used squeezed-state entanglement toteleport light.

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` It states that when two particles come into contact withone another, they can become entangled.

` In an this state, they remain part of the same quantumsystem so that whatever you do to lone of them affectsthe other one in a predictable, domino-like fashion.

` Thus, the group showed how, in principle, entangledparticles might serve as "transporters" of sorts. Byintroducing a third "message" particle to one of theentangled particles,

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` They found a way to scan information from an object A ,which one wishes to teleport, while causing the remaining,

unscanned, part of the information to pass, via theEinstein-Podolsky-Rosen effect, into another object C

` Later, by applying to C a treatment depending on thescanned-out information, it is possible to maneuver C intoexactly the same state as A

` A itself is no longer in that state, having been thoroughlydisrupted by the scanning, so what has been achieved isteleportation, not replication.

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` In the quantum teleportation process, physicists take aphoton (or any other quantum-scale particle, such as anelectron or an atom) and transfer its properties to another photon even if the two photons are at remote locations.

` Properties such as polarization ,direction in which its electricfield vibrates are teleported.

` The scheme does not teleport the photon itself; only itsproperties are imparted to another, remote photon.

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A t the sending station of

the quantumteleporter, A lice encodes a"messenger" photon (M)with a specific state:45 degrees polarization.

This travels towards abeamsplitter. Meanwhile,two additional "entangled"photons ( A and B) arecreated.

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` Specifically, A & B have complementary polarizations. For example, if photon A is later measured to have horizontal (0degrees) polarization, then the other photon must "collapse"into the complementary state of vertical (90 degrees)polarization.

` A arrives at the beamsplitter at the same time as themessage photon M.

` In 25% of all cases, in which the two photons go off intodifferent detectors.

` M photon loses its original identity and becomes entangledwith A .

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` The polarization value for each photon is nowindeterminate, but since they, travel toward differentdetectors A lice knows that the two photons must havecomplementary polarizations.

` Photon M must have complementary polarization to photonA , then the other entangled photon (B) must now attain thesame polarization value as M.

` So we see that the polarization value of photon B is 45degrees the initial value of the message photon.

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` In performing the experiment, the C altech group was able toget around the H eisenberg U ncertainty Principle, the mainbarrier for teleportation of objects larger than a photon.

` In order to teleport a photon without violating the H eisenberg

Principle, the C altech physicists used a phenomenon knownas entanglement .

` In entanglement

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Photon A : The photon to be teleportedPhoton B: The transporting photonPhoton C : The photon that is entangled with

photon B

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Teleportation cartoon

Bellmeasurement

< n> = 0 500 photons

C lassical communication

E nsemble of 10 12 atoms

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` For a person to be transported, a machine would have to bebuilt that can pinpoint and analyze all of the trillion atomsthat make up the human body.

` This machine would then have to send this information toanother location, where the person's body would bereconstructed with exact precision.

` Molecules couldn't be even a millimeter out of place, lest theperson arrive with some severe neurological or physiologicaldefect.

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`

In the Star Trek episodes, and the spin-off series thatfollowed it, teleportation was performed by a machinecalled a transporter.

` This was a platform that the characters stood on, whileScotty adjusted switches on the transporter room control

boards.` The transporter machine then locked onto each atom of

each person on the platform, and used a transporter carrier wave to transmit those molecules to wherever the crewwanted to go

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In this biodigital cloning , tele-travelers would have to die, ina sense.

Their original mind and body would no longer exist. Instead,their atomic structure would be recreated in another location,and digitization would recreate the travelers' memories,emotions, hopes and dreams.

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One day, one of your descendents could finish up a workday at a space office above some far away planet in a galaxymany light years from Earth, tell his or her wristwatch that itstime to beam home for dinner on planet X below and sit downat the dinner table as soon as the words leave his mouth.

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` You can take control of PowerPoint and other presentationmaterial, which would be seen by the audience instantly in real

time as you are talking.` The financial benefits are significant too.` Substantial savings in travel and accommodation costs` Less non productive travel time means more efficient use of

your valuable human resources.` You can be there when travel is impossible.` Improved productivity by leverage of knowledge and better use

of time

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` Teleportation technology is fast becoming an integral part of theclassroom of the future.

` Teleportec has been working with educational establishmentsacross the world in the development of a global network of institutions.

` The vision of being able to teleport people into the classroom for history lessons and cultural exchange is now being realized.

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Queries..???

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` http://ieeexplore.ieee.org/` http://qubit.nist.gov/` www.fas.org/sgp/` www.quniverse.sk/buzek/zaujimave/` Telemetry and teleportation- By shegly` Experimental quantum teleportationDik Bouwmeester, Jian-Wei Pan, Klaus Mattle, Manfred Eibl, H arald

Weinfurter & A nton Zeilinger Institut fur Experimentalphysik, Universitat Innsbruck, Technikerstr. 25, A-

6020 Innsbruck, Austria

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