19 mins · 
A paper in Physics Letters B has raised the possibility that the Large Hadron Collider (LHC) could make a discovery that would put its previous triumph with the Higgs Boson in the shade. The authors suggest it could detect mini black holes....
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Large Hadron ColliderGetty

Collision course: Large Hadron Collider could discover parallel universe

The staggeringly complex LHC ‘atom smasher’ at the CERN centre in Geneva, Switzerland, will be fired up to its highest energy levels ever in a bid to detect - or even create - miniature black holes.

If successful a completely new universe will be revealed – rewriting not only the physics books but the philosophy books too.

It is even possible that gravity from our own universe may ‘leak’ into this parallel universe, scientists at the LHC say.

The experiment is sure to inflame alarmist critics of the LHC, many of whom initially warned the high energy particle collider would spell the end of our universe with the creation a black hole of its own.

But so far Geneva remains intact and comfortably outside the event horizon.

Indeed the LHC has been spectacularly successful. First scientists proved the existence of the elusive Higgs boson ‘God particle’ - a key building block of the universe - and it is seemingly well on the way to nailing ‘dark matter’ - a previously undetectable theoretical possibility that is now thought to make up the majority of matter in the universe.

But next week’s experiment is considered to be a game changer.

Mir Faizal, one of the three-strong team of physicists behind the experiment, said: “Just as many parallel sheets of paper, which are two dimensional objects [breadth and length] can exist in a third dimension [height], parallel universes can also exist in higher dimensions.

“We predict that gravity can leak into extra dimensions, and if it does, then miniature black holes can be produced at the LHC.

"Normally, when people think of the multiverse, they think of the many-worlds interpretation of quantum mechanics, where every possibility is actualised.

"This cannot be tested and so it is philosophy and not science.

“This is not what we mean by parallel universes. What we mean is real universes in extra dimensions.



Image of protons colliding at LHCGetty

Atom art: An image of two protons smashed together at the LHC

“As gravity can flow out of our universe into the extra dimensions, such a model can be tested by the detection of mini black holes at the LHC.

“We have calculated the energy at which we expect to detect these mini black holes in ‘gravity's rainbow’ [a new scientific theory].

“If we do detect mini black holes at this energy, then we will know that both gravity's rainbow and extra dimensions are correct."

When the LHC is fired up the energy is measured in Tera electron volts – a TeV is 1,000,000,000,000, or one trillion, electron Volts

So far, the LHC has searched for mini black holes at energy levels below 5.3 TeV.

But the latest study says this is too low.

Instead, the model predicts that black holes may form at energy levels of at least 9.5 TeV in six dimensions and 11.9 TeV in 10 dimensions.

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University of Cambridge
Technical institute

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Oxford has shown for the first time that the brain has mechanisms it can use to protect itself and keep brain cells alive. Researchers hope harnessing this ability could help in treating stroke and preventing other neurodegenerative diseases in the future. http://www.ox.ac.uk/media/news_stories/2013/130225.html

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University of Cambridge



Mathematical breakthrough sets out rules for more effective teleportation

Credit: Jurvetson from Flickr

New protocol advances solutions for more efficient teleportation - the transport of quantum information at the speed of light.

For the last ten years, theoretical physicists have shown that the intense connections generated between particles as established in the quantum law of ‘entanglement’ may hold the key to eventual teleportation of information.

Now, for the first time, researchers have worked out how entanglement could be ‘recycled’ to increase the efficiency of these connections. Published in the journal Physical Review Letters, the result could conceivably take us a step closer to sci-fi style teleportation in the future, although this research is purely theoretical in nature.

The team have also devised a generalised form of teleportation, which allows for a wide variety of potential applications in quantum physics.

Once considered impossible, in 1993 a team of scientists calculated that teleportation could work in principle using quantum laws. Quantum teleportation harnesses the ‘entanglement’ law to transmit particle-sized bites of information across potentially vast distances in an instant.

Entanglement involves a pair of quantum particles such as electrons or protons that are intrinsically bound together, retaining synchronisation between the two that holds whether the particles are next to each other or on opposing sides of a galaxy. Through this connection, quantum bits of information – qubits – can be relayed using only traditional forms of classical communication.

Previous teleportation protocols have fallen into one of two camps, those that could only send scrambled information requiring correction by the receiver or, more recently, “port-based” teleportation that doesn’t require a correction, but needs an impractical amount of entanglement – as each object sent would destroy the entangled state.

Now, physicists from Cambridge, University College London, and the University of Gdansk have developed a protocol to provide an optimal solution in which the entangled state is ‘recycled’, so that the gateway between particles holds for the teleportation of multiple objects.

They have even devised a protocol in which multiple qubits can be teleported simultaneously, although the entangled state degrades proportionally to the amount of qubits sent in both cases.

“The first protocol consists of sequentially teleporting states, and the second teleports them in a bulk,” said Sergii Strelchuk from Cambridge’s Department of Applied Mathematics and Theoretical Physics, who led the research with colleagues Jonathan Oppenheim of Cambridge and UCL and Michal Horodecki of the University of Gdansk.

“We have also found a generalised teleportation technique which we hope will find applications in areas such as quantum computation.”

Einstein famously loathed the theory of quantum entanglement, dismissing it as “spooky action at a distance”. But entanglement has since been proven to be a very real feature of our universe, and one that has extraordinary potential to advance all manner of scientific endeavor.

“There is a close connection between teleportation and quantum computers, which are devices which exploit quantum mechanics to perform computations which would not be feasible on a classical computer,” said Strelchuk.

“Building a quantum computer is one of the great challenges of modern physics, and it is hoped that the new teleportation protocol will lead to advances in this area.”

While the Cambridge physicists’ protocol is completely theoretical, last year a team of Chinese scientists reported teleporting photons over 143km, breaking previous records, and quantum entanglement is increasingly seen as an important area of scientific investment. Teleportation of information carried by single atoms is feasible with current technologies, but the teleportation of large objects – such as Captain Kirk – remains in the realm of science fiction.

Adds Strelchuk: “Entanglement can be thought of as the fuel, which powers teleportation. Our protocol is more fuel efficient, able to use entanglement thriftily while eliminating the need for error correction.”

The paper Generalized teleportation and entanglement recycling can be viewed here

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TO THE CERN : پنجشنبه هفدهم فروردین ۱۳۹۱ 12:17
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