Far more important this means that we will be able to communicate in
real time across the universe or more importantly, to the moon or
anywhere else in the solar system. This was and is a serious problem
that hampers work in space or on Mars as we presently all can see.
With this it becomes possible to operate in real time from Earth.
The teleportation idea remains a serious stretch using this method
although not so if we produce convenient worm holes and learn how to
use them. Yet it turns out that real time communication is far more
important. After all, no one travels to China to buy a load of
shirts today unless it has become necessary to establish a personal
relationship (.ie a bribe ). Everything except actual shipment can
be handled though communication. That shipment can then be by cheap
and slow and usually is.
Entanglement is now usable as a hard connection between two devices.
That is powerful for exploring the solar system and for Earthbound
linked computer systems where simultaneous communication is valuable.
An Earth sized antenna array leaps to mind.
Beam
me up, Scotty: teleportation ‘could become reality’
Laws
of physics do not prevent the teleportation of large objects,
including humans, professor says
By Agencies
7:00PM
BST 29 May 2014
Star
Trek-style ''beaming up'' of people through space could become a
reality sometime in the far future, the leader of a landmark
teleportation experiment has said.
Nothing
in the laws of physics prevents the teleportation of large objects,
including humans, Professor Ronald Hanson pointed out.
In
contrast, it is physically impossible for anything to travel faster
than light.
''What
we are teleporting is the state of a particle,'' Prof Hanson, from
Delft University of Technology in the Netherlands, said.
''If
you believe we are nothing more than a collection of atoms strung
together in a particular way, then in principle it should be possible
to teleport ourselves from one place to another.
''In
practice it's extremely unlikely, but to say it can never work is
very dangerous.
''I
would not rule it out because there's no fundamental law of physics
preventing it.
''If
it ever does happen it will be far in the future.''
Prof
Hanson's team showed for the first time that it was possible to
teleport information encoded into sub-atomic particles between two
points three metres apart with 100% reliability.
The
demonstration was an important first step towards developing
aninternet-like network between ultra-fast quantum computers whose
processing power dwarfs that of today's supercomputers.
Teleportation
exploits the weird way ''entangled'' particles acquire a merged
identity, with the state of one instantly influencing the other no
matter how far apart they are.
Giving
one particle an ''up'' spin, for instance, might always mean its
entangled partner has a ''down'' spin - theoretically even if both
particles are on different sides of the universe.
Albert
Einstein dismissed entanglement, calling it ''spooky action at a
distance'', but scientists have repeatedly demonstrated that it is a
real phenomenon.
In
Prof Hanson's experiment, three entangled particles - a nitrogen atom
locked in a diamond crystal and two electrons - were used to transfer
spin information a distance of three metres.
Four possible states were
transmitted, each corresponding to a ''qubit'', the quantum
equivalent of a digital ''bit''.
Each
''bit'' of information in a classical computer represents one of two
values, normally zero or one.
But
a ''qubit'' can represent a zero, a one, or a ''superposition'' of
both states at the same time.
The
research is published in the latest online edition of the
journal Science.
Prof
Hanson said: ''The main application of quantum teleportation is a
quantum version of the internet, extending a global network that we
can use to send quantum information.
''We
have shown that it's possible to do this, and it works every time
that you try.
''It
provides the first building block of the future quantum internet.
''One
application nearest to a real life application is secure
communication.
''What
you're doing is using entanglement as your communication channel.
''The
information is teleported to the other side, and there's no way
anyone can intercept that information.
''In
principle it's 100 per cent secure.''
A
more ambitious experiment, involving the teleportation of information
between buildings on the university campus 1,300 metres apart, is
planned in July.
It
is hoped this will answer Einstein's main objection to teleportation,
the possibility that a signal passes between entangled particles at
the speed of light.
''I
believe it will work,'' said Prof Hanson.
''But
it's a huge technical challenge - there's a reason why nobody has
done it yet.''
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