Quantum Teleportation Seminar Report ‘03

INTRODUCTION

Ever since the wheel was invented more than 5,000 years ago,
people have been inventing new ways to travel faster from one point
to another. The chariot, bicycle, automobile, airplane and rocket have
all been invented to decrease the amount of time we spend getting to
our desired destinations. Yet each of these forms of transportation
shares the same flaw: They require us to cross a physical distance,
which can take anywhere, from minutes to many hours depending on
the starting and ending points. There are scientists working right now
on such a method of travel, combining properties of
telecommunications and transportation to achieve a system called
teleportation.

Teleportation Technology is the 21st century alternative to

travel. It can save your organization time and money and enhance
your internal and external communication network.

These systems are very simple to use. All you have to do is

click to connect and you can appear within a 3-dimensional setting in
a chair or behind a lectern on the other side of the world - almost
instantly. The products are designed so that the technology is
invisible. This means you always concentrate on the person or people
you are talking with and not the technology.

Teleportec is developing a global network of teleportation

facilities, which will include most major world cities during 2002.
Organizations from across the world have been attracted by the

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Quantum Teleportation Seminar Report ‘03

immediate savings and improved communication that our technology

can bring to their organization.

For natural high quality, distance communication there is no

substitute. It really is the closest thing to being there. To find out how
Teleportec can revolutionize the way your organization communicates
and reduce your travel and expenses costs.

WHAT IS TELEPORTATION
TECHNOLOGY?

The Teleportec communications 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 and hold true two-way conversations - communicating
naturally with anyone or any group of people anywhere in the world,
as you would if you were there. After all 80% of communication is
non-verbal. The only thing you can't do is shake hands.

More advanced than video conferencing

Video conferencing has never presented itself as a realistic

alternative to face-to-face meetings because of its severe limitations -
only one person can speak at any one time creating an amplified
feeling of distance between participants. Teleportation allows a more
natural form of conversation due to the lack of latency - people
achieve a sense of presence that cannot be gained from any other
technology.

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Proven technology

Teleportec has systems installed in cities across the world each

utilizing a range of connectivity options including ISDN, T1, and ATM
and over the Internet. Teleportec is currently developing applications
for the Internet 2 - the most advanced network in the world.

Helps your business save money and

improve communication

We would start with an analysis of how teleportation technology

could improve your business communication. Our team will install the
custom systems and commission the teleportation technologies.
Ongoing operational support will be provided in over 50 countries
through our strategic partners.

HISTORY

An experiment confirms that teleportation is possible at least for

photons.

Captain Kirk and his crew do it all the time with the greatest of
ease: they discorporate at one point and reappear at another.
However, this form of travel long has seemed remote to the realm of
possibility. Now, however, it turns out that in the strange world of

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quantum physics, teleportation is not only theoretically possible, it can

actually happen.

One group of researchers at the University of Innsbruck in

Austria published an account of the first experiment to verify quantum
teleportation in the December 11 issue of Nature. In addition, another
team headed by Francesco De Martini in Rome has submitted similar
evidence to Physical Review Letters for publication. Neither group
sent a colleague to Katmandu or a car to the moon. Yet what they did
prove is still pretty startling. Anton Zeilinger De Martini and their
colleagues demonstrated independently that it is possible to transfer
the properties of one quantum particle (such as a photon) to another--
even if the two are at opposite ends of the galaxy.

Until recently, physicists had all but ruled out teleportation, in

essence because all particles behave simultaneously like particles
and like waves. The trick was this: they presumed that to produce an
exact duplicate of any one particle, you would first have to determine
both its particle like properties, such as its position, and its wavelike
properties, such as its momentum. Yet doing so would violate the
Heisenberg uncertainty principle of quantum mechanics. Under that
principle, it is impossible to ever measure wave and particle
properties at the same time. The more you learn about one set of
characteristics, the less you can say about the other with any real
certainty.

In 1993, though, an international team of six scientists

proposed a way to make an end-run around the uncertainty principle.

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Their solution was based on a theorem of quantum mechanics dating

to the 1930s called the Einstein-Podolsky-Rosen effect. 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, domino-like fashion. Thus, the
group showed how, in principle, entangled particles might serve as
"transporters" of sorts. By introducing a third "message" particle to
one of the entangled particles, one could transfer its properties to the
other one, without ever measuring those properties.

Experimental proof

Bennett's ideas were not verified experimentally until the

Innsbruck investigators performed their recent experiment.The
researchers produced pairs of entangled photons and showed they
could transfer the polarization state from one photon to another.

Teleportation still has one glitch: In the fuzzy realm of quantum

mechanics, the result of the transfer is influenced by the receiver's
observation of it. (As soon as you look at, say, Bones, it will look like
something else.) Therefore, someone still has to tell the receiver that
the transformation has been made so that they can correctly interpret
what they see. And this sort of communication cannot occur at faster-

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than-light speeds. Even so, the scheme has definite applications in

ultra fast quantum computers and in utilizing quantum phenomena to
ensure secure data transmission.

ELECTRONS TRAVELING ONE BY ONE

Current in conventional electronic devices is considered a kind

of flowing river of electrons, in which the electrons are as uncountable
as molecules of water. Reduce the dimensions of the material, and
the energy of those electrons becomes quantized, or divided into
discrete increments. Still, the precise number of electrons defies
calculation.

Now, at the National Institute of Standards and Technology

(NIST) in Boulder, Colo., researcher Mark Keller is building a system
to make ultra-accurate measurements of capacitance, a form of
electrical impedance, by precisely counting the number of electrons
put on a capacitor. The heart of Keller's creation is a circuit that can
count to about 100 million electrons, give or take just one. This tally,
along with a commensurate measurement of the voltage on the
capacitor, will be used to determine capacitance with extreme
accuracy. Thus, the capacitor will become a standard, useful to
technological organizations for such applications as calibrating
sensitive measuring equipment.

Keller's system is an expanded version of the electron turnstile

invented in the late 1980s by researchers at Delft University in the
Netherlands and at the Saclay Center for Nuclear Research in

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France. In those days, the Delft and Saclay workers were trying to
build an electron counter that could be used as a standard for current,
rather than capacitance. Ultra-accurate electron counts are, in theory
at least, useful for setting a standard for either quantity.

The central part of the electron turnstile was an aluminum

electrode, about one micron long and coated with aluminum oxide.
This bar was known as an island because it was isolated on each
side by a nonconductive junction connected to a metallic electrode, or
"arm". When a large voltage was applied across this device, between
the two arms, it behaved like a conventional resistor. However, at
temperatures of about one Kelvin and voltages of a few tenths of a
millivolt, the resistance increased dramatically. No current could flow
through the device because the electrons had insufficient energy to
get past the junctions and onto the island. Increasing the voltage to
about one millivolt, however, gave electrons just enough energy to
tunnel from the arm, across the junction and to the island.

To control the flow of electrons, the voltage was applied to the

island through a capacitor (not a standard capacitor but a high-quality
but otherwise ordinary capacitor). As the capacitor charged and
discharged, the voltage increased and decreased, forcing one
electron onto, and then off, the central island. An alternating current,
fed to the capacitor, controlled the charging and discharging; thus, the
frequency of the alternating current determined the rate at which
individual electrons passed through the island. The concept was
elegant, but the implementation fell short of the mark. The Delft and
Saclay workers were able to get accuracies of one electron in about
1,000. For them to top the existing standard for current,a precision of
better than one in 10 million would have been necessary. The

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problem with this single-island setup was that occasionally two

electrons, or none at all, would pass through the island during a cycle
of the alternating current. Moreover, current flow through the turnstile,
at about a Pico ampere (0.000000000001 ampere) was too low for
useful metrology.

In the early 1990s researcher, John Martinis of NIST noticed

the work but did so in hopes of producing a standard for capacitance
rather than for current. Shortly before, the Saclay researchers had
expanded their electron turnstile into an electron "pump," with two
islands and three junctions. Martinis then built a pump with four
islands separated by five nonconductive junctions. The numbers were
chosen because theoretical calculations based on the physics of
tunneling had indicated that they would suffice to achieve an accuracy
of one part in 100 million, the figure needed to create a competitive
standard for capacitance.

In these pumps, alternating current fed to a capacitor still

controlled the voltage applied to each island. But these currents were
synchronized so that the voltages were applied sequentially down the
chain of islands, in effect dragging a single electron through the chain
from island to island. When incorporated into a capacitance standard,
sometime in the near future, the circuit will be arranged so that the
electrons that go through the chain of islands will wind up on a
standard capacitor. Thus, the number of cycles of the alternating
current will determine the number of electrons on that standard
capacitor.

By offering electrical control over each of the junctions, the

electron pump turned out to be considerably more accurate than the

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electron turnstile. Yet, the sought-after accuracy of one part in 100

million was still out of reach. In a paper published in 1994, Martinis
reported that he had achieved accuracy of five parts in 10 million.
Researchers were unsure why the accuracy fell short of the
theoretical prediction.

Along came Mark Keller, who joined NIST as a postdoctoral

employee in 1995. Keller extended the electron pump to seven
islands and, just recently, achieved the desired accuracy of one part
in 100 million. He is now working to turn the circuit into a practical
capacitance standard, using a special capacitor developed by NIST's
Neil Zimmerman. The capacitor does not "leak" charges and is
unusually insensitive to frequency.

With the metrological goal achieved, Keller and Martinis have

turned their attention to the nagging mismatch between experiment
and theory. They believe they have identified an important source of
error, unacknowledged in the original theory. The error, they suspect,
is caused by electromagnetic energy from outside the pump, which
gets in and causes electrons to go through junctions when they
should not. The two researchers are now conducting painstaking
measurements to test the idea. Sometimes, it would appear, good
science comes out of technology, rather than the other way around.

QUANTUM INFORMATION PROCESSING

In 1993, Charles Bennett (IBM, TJ Watson Research Center)

and colleagues theoretically developed a method for quantum
teleportation. Now, a team of physicists from Caltech, Aarhus

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University, and Dr. Sam Braunstein of the University of Wales,

Bangor has successfully achieved quantum teleportation of optical
coherent states.

Quantum teleportation is similar to the far-fetched 'transporter'

technology used in the television series 'Star Trek'. "Quantum
teleportation involves the utter destruction of an unknown physical
entity and its reconstruction at a remote location," says Professor H.
Jeff Kimble, the leader of the research group at Caltech, who with
Braunstein conceived the experiment. Using a phenomenon known
as 'quantum entanglement', the researchers force a photon of light to
project its unknown state onto another photon, with only a miniscule
amount of information being sent between the two. 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. There has been
much progress in the field, but not an actual demonstration until now.

In the October 23 1998 issue of Science, the physicists

described how they used squeezed-state entanglement to teleport
light. In previous teleportation experiments (announced over the last
year by separate research groups in Austria and Rome), only two-
dimensional discrete variables (e.g. the polarization states of a
photon, or the discrete levels of a two-level atom) were teleported. In
this recent experiment, however, every state, or the entire quadrature
phase amplitude, of the light beam was teleported. In the Science

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article, the researchers explain that teleporting optical fields may

someday be appropriate for the use in communication technology.

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. How this is accomplished is
usually not explained in detail, but the general idea seems to be that
the original object is scanned in such a way as to extract all the
information from it, then this information is transmitted to the receiving
location and used to construct the replica, not necessarily from the
actual material of the original, but perhaps from atoms of the same
kinds, arranged in exactly the same pattern as the original. 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 teleporter destroys
the original, functioning as a super transportation device, not as a
perfect replicator of souls and bodies.

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.

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According to the uncertainty principle, the more accurately an object

is scanned, the more it is disturbed by the scanning process, until one
reaches a point where the object's original state has been completely
disrupted, still without having extracted enough information to make a
perfect replica. This sounds like a solid argument against
teleportation: if one cannot extract enough information from an object
to make a perfect copy, it would seem that a perfect copy cannot be
made.

But the six scientists found a way to make an end-run around

this logic, using a celebrated and paradoxical feature of quantum
mechanics known as the Einstein-Podolsky-Rosen effect. In brief,
they found a way to scan out part of the information from an object A,
which one wishes to teleport, while causing the remaining,
unscanned, part of the information to pass, via the Einstein-Podolsky-
Rosen effect, into another object C which has never been in contact
with A. Later, by applying to C a treatment depending on the
scanned-out information, it is possible to maneuver C into exactly the
same state as A was in before it was scanned. A itself is no longer in
that state, having been thoroughly disrupted by the scanning, so what
has been achieved is teleportation, not replication.

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As the figure suggests, the unscanned part of the information is

conveyed from A to C by an intermediary object B, which interacts
first with C and then with A. What? Can it really be correct to say "first
with C and then with A"? Surely, in order to convey something from A
to C, the delivery vehicle must visit A before C, not the other way
around. But there is a subtle, unscannable kind of information that,
unlike any material cargo, and even unlike ordinary information, can
indeed be delivered in such a backward fashion. This subtle kind of
information, also called "Einstein-Podolsky-Rosen (EPR) correlation"
or "entanglement", has been at least partly understood since the
1930s when it was discussed in a famous paper by Albert Einstein,
Boris Podolsky, and Nathan Rosen. In the 1960s, John Bell showed
that a pair of entangled particles, which were once in contact but later
move too far apart to interact directly, can exhibit individually random
behavior that is too strongly correlated to be explained by classical
statistics. Experiments on photons and other particles have
repeatedly confirmed these correlations, thereby providing strong

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evidence for the validity of quantum mechanics, which neatly explains

them.

Another well-known fact about EPR correlations is that they

cannot by themselves deliver a meaningful and controllable message.
It was thought that their only usefulness was in proving the validity of
quantum mechanics. Now it is known that, through the phenomenon
of quantum teleportation, they can deliver exactly that part of the
information in an object, which is too delicate to be scanned out, and
delivered by conventional methods.

This figure compares conventional facsimile transmission with

quantum teleportation (see above). In conventional facsimile
transmission, the original is scanned, extracting partial information

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about it, but remains more or less intact after the scanning process.
The scanned information is sent to the receiving station, where it is
imprinted on some raw material (example: paper) to produce an
approximate copy of the original. 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 C
into an exact replica of the former state of A.

THE INNSBRUCK EXPERIMENT

IMAGE DEPICTS the University of Innsbruck experimental

setup for quantum teleportation. In the quantum teleportation process,
physicists take a photon (or any other quantum-scale particle, such as
an electron or an atom) and 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. The
scheme does not teleport the photon itself; only its properties are
imparted to another, remote photon.

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Quantum Teleportation Seminar Report ‘03

Here is how it works: At the sending station of the quantum

teleporter, Alice encodes a "messenger" photon (M) with a specific
state: 45 degrees polarization. This travels towards a beam splitter.
Meanwhile, two additional "entangled" photons (A and B) are created.
The polarization of each photon is in a fuzzy, undetermined state, yet
the two photons have a precisely defined interrelationship.
Specifically, they must have complementary polarizations. For
example, if photon A is later measured to have horizontal (0 degrees)
polarization, then the other photon must "collapse" into the
complementary state of vertical (90 degrees) polarization.

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Entangled photon A arrives at the beam splitter at the same

time as the message photon M. The beam splitter causes each
photon to both continue toward detector 1 or change course and
travel to detector 2. In 25% of all cases, in which the two photons go
off into different detectors, Alice does not know which photon went to
which detector. This inability of Alice to distinguish between the two
photons causes quantum weirdness to kick in. Just by the very fact
that the two photons are now indistinguishable, the M photon loses its
original identity and becomes entangled with A. The polarization value
for each photon is now indeterminate, but since they, travel toward
different detectors Alice knows that the two photons must have
complementary polarizations.

Since message photon M must have complementary

polarization to photon A, then the other entangled photon (B) must
now attain the same polarization value as M. Therefore, teleportation
is successful. Indeed, Bob sees that the polarization value of photon
B is 45 degrees: the initial value of the message photon.

PHOTON EXPERIMENTS

In 1998, physicists at the California Institute of Technology

(Caltech), along with two European groups, turned the IBM ideas into
reality by successfully teleporting a photon, a particle of energy that
carries light. The Caltech group was able to read the atomic structure
of a photon, send this information across 1 meter (3.28 feet) of
coaxial cable and create a replica of the photon. As predicted, the
original photon no longer existed once the replica was made.

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In performing the experiment, the Caltech group was able to

get around the Heisenberg Uncertainty Principle, the main barrier
for teleportation of objects larger than a photon. This principle states
that you cannot simultaneously know the location and the speed of a
particle. But if you can't know the position of a particle, then how can
you teleport it? In order to teleport a photon without violating the
Heisenberg Principle, the Caltech physicists used a phenomenon
known as entanglement. In entanglement, at least three photons are
needed to achieve quantum teleportation:

• Photon A: The photon to be teleported

• Photon B: The transporting photon
• Photon C: The photon that is entangled with photon B

If researchers tried to look too closely at photon A without

entanglement, they would bump it, and thereby change it. By
entangling photons B and C, researchers can extract some
information about photon A, and the remaining information would be
passed on to B by way of entanglement, and then on to photon C.
When researchers apply the information from photon A to photon C,
they can create an exact replica of photon A. However, photon A no
longer exists as it did before the information was sent to photon C.

In other words, when Captain Kirk beams down to an alien

planet, an analysis of his atomic structure is passed through the
transporter room to his desired location, where a replica of Kirk is
created and the original is destroyed.

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A more recent teleportation success was achieved at the

Australian National University, when researchers successfully
teleported a laser beam.

While the idea of creating replicas of objects and destroying the

originals doesn't sound too inviting for humans, quantum teleportation
does hold promise for quantum computing. These experiments with
photons are important in developing networks that can distribute
quantum information. Professor Samuel Braunstein, of the
University of Wales, Bangor, called such a network a "quantum
Internet." This technology may be used one day to build a quantum
computer that has data transmission rates many times faster than
today's most powerful computers.

POLARIZATION ANALYSIS OF THE

TELEPORTED PHOTON

The data shows the polarization of the teleported photon as a

function of the delay between the arrival of photon 1 and 2 at Alice’s
beam splitter (when translating the retroflecting UV-mirror). Only
around zero delay, interference occurs and allows registration of a
Bell-state.

The polarization of photon 3 is analyzed if detector p has

indicated that there is a photon to be teleported and if Alice’s Bell-
state analyzer has registered the state . Photon 3 shows the
polarization defined by the polarizer acting on photon 1.

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The polarization, without any background subtraction, is 70%

±3%. The results for the two non-orthogonal states (45° and 90°)
prove teleportation of the quantum state of a single photon.

HUMAN TELEPORTATION`

We are years away from the development of a teleportation

machine like the transporter room on Star Trek's Enterprise
spaceship. 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 1028 atoms that make up
the human body. That's more than a trillion atoms. This machine
would then have to send this information to another location, where
the person's body would be reconstructed with exact precision.
Molecules couldn't be even a millimeter out of place, lest the person
arrive with some severe neurological or physiological defect.

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In the Star Trek episodes, and the spin-off series that followed
it, teleportation was performed by a machine called a transporter. This
was a platform that the characters stood on, while Scotty 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 crew wanted to go. Viewers watching at home
witnessed Captain Kirk and his crew dissolving into a shiny glitter
before disappearing, rematerializing instantly on some distant planet.

If such a machine were possible, it's unlikely that the person

being transported would actually be "transported." It would work more
like a fax machine a duplicate of the person would be made at the
receiving end, but with much greater precision than a fax machine.
But what would happen to the original? One theory suggests that
teleportation would combine genetic cloning with digitization.

In this biodigital cloning, tele-travelers would have to die, in a

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. So the travelers would still exist, but they would do so in
a new body, of the same atomic structure as the original body,
programmed with the same information.

But like all technologies, scientists are sure to continue to

improve upon the ideas of teleportation, to the point that we may one
day be able to avoid such harsh methods. One day, one of your
descendents could finish up a work day at a space office above some
far away planet in a galaxy many light years from Earth, tell his or her

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wristwatch that it's time to beam home for dinner on planet X below
and sit down at the dinner table as soon as the words leave his
mouth.

ADVANTAGES

Teleportation Technology is now being used by organizations

across the world to enable people to be in two (or more) places at
once.

These organizations have recognized the substantial

communication benefits of the technology:

 Genuine eye-to-eye contact with individuals or audiences in

the distant location, which means you, can make that personal
connection count wherever you are.

 The quality of the communication means that you are able to

see and respond to the mood and body language of the person
you are speaking with to build trust and understanding.
 There is natural two-way communication with no audio
interference or discernable latency even if the communication is
across twelve time zones.

 You can take control of PowerPoint and other presentation

material, which would be seen by the audience instantly - in real
time as you are talking.

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 With access to the Teleportec Global Network you just "click

to connect" with any of the Teleportec facilities across the EU,
North America and Australasia via our Operating System.

 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

 No expensive training required - The technology is very easy

to use.

 You can be there when travel is impossible.

 Improved productivity by leverage of knowledge and better

use of time: "neatness and order are not what we are after. We
are after getting information to people who can act on it." Jack
Welsh, CEO General Electric.

CLASSROOM OF THE FUTURE

(CONCLUSION)

Teleportation technology is fast becoming an integral part of the

classroom of the future. The UK Government in its latest Education
Excellence in Cities Newsletter makes it clear that the technology

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"opens the way for innovation and new ways of teaching and
learning". Over the past twelve months, Teleportec has been working
with educational establishments across 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. Schools in Salford, Greater Manchester in the UK
and Texas in the USA are using the technology to share knowledge
and experiences on a weekly basis. Schools in mainland Europe and
Australia are also getting involved. Justin Wilson, Director of Salford's
City Learning Center believes that "the use of the technology will be
an important motivational tool for gifted and talented pupils"

In October, systems were installed at schools in Padre Island,

Texas as an emergency measure when the bridge linking it to the
mainland was destroyed. Since then, a large part of the curriculum
has been delivered virtually. Teleportec are planning a series of
global events for education over the coming months. Please contact
Teleportec for further information. The cost of this equipment is
nearest 35 lacks.

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REFERENCES

 C.H. Bennett, G. Brassard, C. Crepeau, R. Jozsa, A. Peres, and

W. Wootters, "Teleporting an Unknown Quantum State via Dual
Classical and EPR

 Channels", Phys. Rev. Lett. vol. 70, pp 1895-1899 (1993) (the

original 6-author research article).

 Tony Sudbury, "Instant Teleportation", Nature vol.362, pp 586-

587 (1993) (a semi popular account).

 Ivars Peterson, Science News, April 10, 1993, p. 229. (another

semi popular account).

 Samuel Braunstein, A fun talk on teleportation

 For recent experimental and theoretical papers, do a title search

on "teleportation" in the Los Alamos E-print Archive [IBM
Research | Quantum Information

Dept of ECE 25 MESCE Kuttippuram

Quantum Teleportation Seminar Report ‘03

ABSTRACT

Teleportation is the name given by the science fiction writers to

the feat of making an object or person disintegrate in one place while
the exact replica appears somewhere else. How this is accomplished
is usually not explained in detail, but the general idea seems to be
that the original object is scanned in such away as to extract all the
information from it, then this information is transmitted to the receiving
location and used to construct the replica, not necessarily from the
actual material of the original, but perhaps from atoms of same kinds,
arranged in exactly the same pattern as the original. A teleportation
machine would look like a fax machine, except that it would work on
both 3-dimensional objects as well as documents, it would produce an
exact copy rather than 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 same
person meet; but the more common kind of teleporter destroys the
original, functioning as a super transportation device, not as a perfect
replicator of souls and bodies.

Dept of ECE 26 MESCE Kuttippuram

Quantum Teleportation Seminar Report ‘03

CONTENTS

 Introduction

 What is teleportation technology

 History

 Electrons travel one by one

 Quantum Information Processing

 Quantum teleportation

 The Innsbruck experiment

 Photon experiment

 Polarization analysis of the teleported photon

 Human teleportation

 Advantages

 Conclusion

 References

Dept of ECE 27 MESCE Kuttippuram

Quantum Teleportation Seminar Report ‘03

ACKNOWLEDGEMENT

I extend my sincere thanks to Prof. P.V.Abdul Hameed,

Head of the Department for providing me with the guidance and

facilities for the Seminar.

I express my sincere gratitude to Mr. V.T.Gopakumar,

Seminar coordinator and Mrs. Abidha.K.A, Staff in charge, for

their kind cooperation and guidance for preparing and

presenting this seminar.

I also extend my sincere thanks to all other faculty

members of Electronics and Communication Department and my

friends for their cooperation and encouragement.

Dept of ECE 28 MESCE Kuttippuram