contents

What is the Need? What is Teleportation? Previous Theory Flaws EPR Effect Steps Involved in Teleportation Human Teleportation Applications Telepresence Successful Experiments Advantages References

Various forms of transportation require us to cross a physical distance, which can take anywhere from minutes to many hours.

Telecommunications +

Transportation=

Teleportation.

need

What is teleportation ? Teleportation includes making an object or person

disintegrate in one place while a perfect replica appears somewhere else.

Star Trek Original series_(360p).flv

Previous theory

The procedure for teleportation in science fiction varies from story to story but generally goes as follows:

A device scans the original object to extract all the information needed to describe it.

A transmitter sends the information to the receiving station, to obtain an exact replica of the original.

Flaws It violated the Heisenberg’s Uncertainty principle .

Thus, one cannot perform a perfect scan of the object to be teleported

The location or velocity of every atom and electron would be subjected to errors.

Heisenberg’s uncertainty principle makes it impossible to measure the exact, total quantum state of any object with certainty. Therefore, it would seem that a perfect copy cannot be made.

Einstein-podolsky-rosen effect (EPR)

To circumvent the limitation imposed by uncertainty principle EPR theorem was derived.

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

In an entangled state, both particles remain part of the same quantum system so that whatever you do to one of them affects the other one in a predictable way. Thus, it shows how, in principle, entangled particles might serve as "transporters" of sorts. .

ENTANGLED PHOTON PAIRS are created when a laser beam passes through a crystal such as beta barium borate. It converts a single photon into two photons of lower energy, one polarized vertically (on red cone), one polarized horizontally (on blue cone). If the photons happen to travel along the cone intersections (green), neither photon has a definite polarization, but their relative polarizations are complementary; they are then entangled.

Steps involved

A pair of highly entangled ions B and C are created.

The state to be teleported is created in A. Then B is entangled with A.

The internal state of both these is then measured and result sent to C

This transforms the quantum state of ion C into that created for A.

Human teleportation The laws of physics may even make it impossible to

create a transporter that enables a person to be sent instantaneously to another location, which would require travel at the speed of light.

For a person to be transported, a machine would have to be built that can pinpoint and analyze all of the 1028atoms that make up the human body.

Molecules couldn't be even a millimetre out of place, lest the person arrive with some severe neurological or physiological defect.

SOME SUCCESSFUL EXPERIMENTS

In 1998, physicists at the California Institute of Technology

along with two European groups, successfully teleported a photon across 3.28 feet of coaxial cable.

In 2002, researchers at the Australian National University successfully teleported a laser beam.

In 2004, Researchers from the University of Vienna and the Austrian Academy of Science teleported particles of light over a distance of 600m

In 2006,physicists at Niels Bohr Institute in Copenhagen, Denmark, teleported information stored in a laser beam across 1.6 feet.

In May 2010, A team of 15 Chinese researchers from Tsinghua University in Beijing and the Hefei National Laboratory, achieved secure quantum key distribution over 16 kilometres of free space.

And They Continued..

In April 2011,physicist at University of Tokyo, teleported a complex set of quantum information from one point to another.

applications

QUANTUM INFORMATION : We can use polarization states of photons i.e. +-45 degree to define on-off state of the transistors

Like we have 0 and 1 in binary and electrons with spin-up and spin-down states to encode the information. These quantum bits of information are called qubits.

QUANTUM CRYPTOGRAPHY : To send a key send photons in one of four polarizations: -45, 0, 45, or 90 degrees. The receiver measures the incoming photons, randomly choosing whether to measure at 90 degrees or 45 degrees, records the results but keeps them secret. The sender tells the receiver which of the measurements were of the correct type. Both the sender and receiver keep only the bits that were measured correctly, and in this way they form the key.

PRESENT TECHNOLOGY “TELEPRESENCE”

Telepresence system is unique and has been designed to enable a life-size image of a person to appear within a 3D environment.

You can :- make eye contact with individuals use props hold true two-way conversations - communicating

naturally with anyone or any group of people anywhere in the world.

× The only thing you can't do is shake hand.

telepresence.flv

Tata Communications began public room service in India in July 2008 and currently have 30 public Telepresence rooms live globally.

These rooms can be reserved by anyone for a pay-per use hourly rate, typically in the $500/hour range.

They are accessible 7×24 and are proven as a cost-effective method for enabling higher quality collaboration across geographies.

Major manufactures of telepresence equipment are; Cisco, Polycom, Tandberg, HP Halo and Lifesize.

Advantages

Transmission at higher rates. Secure Data transmission. Can detect eavesdropping. Transportation becomes easier. Reduced cost for transportation. Accidents will be completely absent. Fastest transportation.

In future we will not be surprised to see such sign boards

REFERENCES

[1] http://www.research.ibm.com

[2] http://www.electronicsnews.com.au

[3] http://en.wikipedia.org

[4] http://www.youtube.com

QUERIES ???

THANK YOU !!