Quantum Teleportation


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Quantum Teleportation

  1. 1.  What is the Need? What is Teleportation? Previous Theory Flaws EPR Effect Steps Involved in Teleportation Human Teleportation Applications Telepresence Successful Experiments Advantages References
  2. 2. needVarious forms of transportation require us to cross aphysical distance, which can take anywhere fromminutes to many hours. Telecommunications + Transportation = Teleportation.
  3. 3. Teleportation includes making an object or persondisintegrate in one place while a perfect replicaappears somewhere else.
  4. 4. 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.
  5. 5. It violated the Heisenberg’s Uncertainty principle .Thus, one cannot perform a perfect scan of the object tobe teleportedThe location or velocity of every atom and electron wouldbe subjected to errors.Heisenberg’s uncertainty principle makes it impossible tomeasure the exact, total quantum state of any object withcertainty. Therefore, it would seem that a perfect copycannot be made.
  6. 6. To circumvent the limitation imposed by uncertaintyprinciple EPR theorem was derived.It states that when two particles come into contact withone another, they can become "entangled". In an entangled state, both particles remainpart of the same quantum system so that whatever you doto one of them affects the other one in a predictable way.Thus, it shows how, in principle, entangled particles mightserve as "transporters" of sorts.
  7. 7. ENTANGLED PHOTON PAIRS are created when a laser beampasses through a crystal such as beta barium borate. It converts asingle photon into two photons of lower energy, one polarizedvertically (on red cone), one polarized horizontally (on blue cone). Ifthe photons happen to travel along the cone intersections (green),neither photon has a definite polarization, but their relativepolarizations are complementary; they are then entangled.
  8. 8. A pair of highly entangled ions B and C are created. The state to be teleported is created in A. Then B isentangled with A. The internal state of both these is then measured and resultsent to C This transforms the quantum state of ion C into that created for A.
  9. 9.  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 couldnt be even a millimetre out of place, lest the person arrive with some severe neurological or physiological defect.
  10. 10.  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
  11. 11. And They Continued.. 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.
  12. 12.  In April 2011,physicist at University of Tokyo, teleported acomplex set of quantum information from one point to another.
  13. 13.  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.
  14. 14. 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 cant do is shake hand.
  15. 15. Tata Communications began public room service in India inJuly 2008 and currently have 30 public Telepresence roomslive globally.These rooms can be reserved by anyone for a pay-per usehourly rate, typically in the $500/hour range.They are accessible 7 24 and are proven as a cost-effectivemethod for enabling higher quality collaboration acrossgeographies.Major manufactures of telepresence equipment are; Cisco,Polycom, Tandberg, HP Halo and Lifesize.
  16. 16.  Transmission at higher rates. Secure Data transmission. Can detect eavesdropping. Transportation becomes easier. Reduced cost for transportation. Accidents will be completely absent. Fastest transportation.
  17. 17. In future we will not be surprised to see such sign boards
  18. 18. [1] http://www.research.ibm.com[2] http://www.electronicsnews.com.au[3] http://en.wikipedia.org[4] http://www.youtube.com
  19. 19. THANK YOU !!