Long Range Quantum Teleportation

Teleportation: Yes, It’s Finally Here

According to a report by Discovery News, Chinese scientists have managed to ‘teleport” information almost ten miles (16 kilometres) by using what is called “quantum entanglement.”

Collected from: Teleportation: Yes, It’s Finally Here – IndyPosted

... a short animation that attempts to make sense of quantum mechanics and the method of quantum teleportation

Collected from: YouTube - "Quantum Teleportation" by Phil Magnini

Beam Me Up, Scotty! Scientists Teleport Info 10 Miles

We may never be able to teleport ourselves "Star Trek"-style, but scientists managed to transmit information a record distance using entangled photons.

THE GIST

• Scientists manage to teleport information nearly 10 miles with unprecedented precision.
• The team used quantum entanglement to teleport the information.
• The feat could lead to a global, impenetrable communication network and powerful quantum computers.

Collected from: Beam Me Up, Scotty! Scientists Teleport Info 10 Miles : Discovery News

Quantum teleportation achieved over 16 km

a, A birds-eye view of the 16-km free-space quantum teleportation experiment. Charlie sends photon 1 to Alice for BSM. Classical information, including the results of the BSM and the signal for time synchronization, is sent through the free-space channel with photon 2, to Bob, before decoding and triggering of the corresponding unitary transformation. b, Sketch of the experimental system. See the original paper for more details. Image copyright: Nature Photonics, doi:10.1038/nphoton.2010.87

The experiments confirm the feasibility of space-based quantum teleportation, and represent a giant leap forward in the development of quantum communication applications.
The paper is available in full online at Nature Photonics.
More information: Xian-Min Jin, Experimental free-space quantum teleportation, Nature Photonics, Published online: 16 May 2010. doi:10.1038/nphoton.2010.87

Collected from: Quantum teleportation achieved over 16 km

Sources

Teleportation: Yes, It’s Finally Here – IndyPosted
http://indyposted.com/26123/teleportation-yes-its-finally-here/
YouTube - "Quantum Teleportation" by Phil Magnini
http://www.youtube.com/watch?v=_qmSdC7aQpY
Beam Me Up, Scotty! Scientists Teleport Info 10 Miles : Discovery News
http://news.discovery.com/tech/teleportation-quantum-mechanics.html
Quantum teleportation achieved over 16 km
http://www.physorg.com/news193551675.html

Related

Researchers Achieve Quantum Teleportation Over 10 Miles of Empty Space | Popular Science
http://www.popsci.com/science/article/2010-05/researchers-achieve-quantum-teleportation-over-10-miles
Quantum Teleportation Achieved Across 10 Miles
http://gizmodo.com/5543923/quantum-teleportation-achieved-across-10-miles?utm_source=feedburner&utm_medium=feed&utm_campaign=Feed:+gizmodo/full+%28Gizmodo%29&utm_content=Google+Reader
LinkNotes: Long-Distance Teleportation Achieved
http://rj3sp.blogspot.com/2009/01/long-distance-teleportation-achieved.html
Experimental free-space quantum teleportation : Abstract : Nature Photonics
http://www.nature.com/nphoton/journal/v4/n6/abs/nphoton.2010.87.html
Quantum teleportation - Wikipedia, the free encyclopedia
http://en.wikipedia.org/wiki/Quantum_teleportation
Quantum entanglement - Wikipedia, the free encyclopedia
http://en.wikipedia.org/wiki/Quantum_entanglement
HowStuffWorks "Entanglement and Recent Experiments"
http://science.howstuffworks.com/teleportation1.htm

A Random Number Generator Based on Fundamental Principles of Quantum Mechanics

Clipped from: Random, but not by chance: A quantum random-number generator for encryption, security

Random, but not by chance: A quantum random-number generator for encryption, security

Researchers have devised a new kind of random number generator, for encrypted communications and other uses, that is cryptographically secure, inherently private and - most importantly - certified random by laws of physics.

That is important because randomness is surprisingly rare. Although the welter of events that transpire in the course of daily life can certainly seem haphazard and arbitrary, none of them is genuinely random in the sense that they could not be predicted given sufficient knowledge. Indeed, true randomness is almost impossible to come by.

[...]

Now, however, a team of experimentalists from the Joint Quantum Institute (JQI) , in partnership with European quantum information scientists, has demonstrated a method of producing a certifiably random string of numbers based on fundamental principles of quantum mechanics. They report their results in the 15 April 2010 issue of Nature.

Clipped from: Randomness is no lottery thanks to entangled ions - physicsworld.com

Randomness is no lottery thanks to entangled ions

Monroe's team employed a method known as a Bell test, named after the late physicist John Bell who invented it in 1964. They placed two atomic ions in separate enclosures one metre apart, and then "entangled" them by passing single photons through them. Once entangled, the state of one atom is inextricably linked to the superposed state of the other, so that a measurement of one – in this case, a measurement made by recording the emission of light – causes the states of both atoms to collapse.

Over the course of a month, the researchers measured the states of more than 3000 entangled atomic ion pairs, generating a string of 42 binary digits. Because the correlations between the measured states were less than a certain value, as given by Bell's famous "inequality", they were – according to quantum mechanics – certifiably random.

Clipped from: Random Numbers -- But Not By Chance

Random Numbers -- But Not By Chance
April 2010

Every time their apparatus signaled that entanglement had been achieved, the researchers rotated each atom on its axes according to a random schedule and then took a measurement of each atom’s emitted light. [See Figure 1.] The value from each of two atoms was then used to generate a binary number. [See animation.]

Quantum Random Number Generator from JQI Admin on Vimeo.

Sources:

1. Random, but not by chance: A quantum random-number generator for encryption, security
2. Randomness is no lottery thanks to entangled ions - physicsworld.com
3. Random Numbers -- But Not By Chance
4. Quantum Random Number Generator on Vimeo

Related:

1. A truth test for randomness : Nature News
2. Quantum Effects Exploited to Generate Random Numbers: Scientific American
3. Entangle qubits for a true random number machine - physics-math - 14 April 2010 - New Scientist
4. Bell's theorem - Wikipedia, the free encyclopedia

Towards Quantum Superposition of Living Organisms

Clipped from: Technology Review: Blogs: arXiv blog: How to Create Quantum Superpositions of Living Things

How to Create Quantum Superpositions of Living Things

First photons, atoms and molecules. Now physicists want to create a quantum superposition of a virus, which will allow them to perform Schrodinger's Cat experiment for real.
[...]
But why bother? Performing a Schrodinger's cat experiment would be fun (although not for the virus). Romero-Isart and pals go further and say the work will "experimentally address fundamental questions, such as the role of life in quantum mechanics,and differences between many-world and Copenhagen interpretations". Perhaps.

Clipped from: Schrödinger's cat - Wikipedia, the free encyclopedia

Schrödinger's cat is a thought experiment, often described as a paradox, devised by Austrian physicist Erwin Schrödinger in 1935. It illustrates what he saw as the problem of the Copenhagen interpretation of quantum mechanics applied to everyday objects.

Schrödinger's Cat: A cat, along with a flask containing a poison, is placed in a sealed box shielded against environmentally induced quantum decoherence. If an internal Geiger counter detects radiation, the flask is shattered, releasing the poison that kills the cat. The Copenhagen interpretation of quantum mechanics implies that after a while, the cat is simultaneously alive and dead. Yet, when we look in the box, we see the cat either alive or dead, not a mixture of alive and dead.

Clipped from: YouTube - Schrodinger's Cat for real

Clipped from: Skeptic's Play: Intro to the Quantum Measurement Problem

Intro to the Quantum Measurement Problem

The Copenhagen Interpretation
[...] According to this interpretation, particles can be described by their wavefunctions. Wavefunctions behave like waves. They propagate around walls, and can go through multiple slits simultaneously. They can diffract and interfere with themselves.

Unlike normal waves, we cannot observe wavefunctions directly. If we try to observe a wavefunction, something called "wavefunction collapse" occurs. When a wavefunction collapses, it suddenly becomes like a particle.[...]

Clipped from: Skeptic's Play: Quantum superposition

Quantum superposition

Superposition may sound really weird, but mathematically, it's not weird at all. Schrodinger's equation, the equation that defines quantum mechanics, has the property that if you take any two wavefunctions and add them together, you'll get another wavefunction. So if you take one wavefunction with energy E₁ and another wavefunction with energy E₂, and add them together, you get a mixed state which has a superposition of energy levels E₁ and E₂ simultaneously!

[...]
If you actually try to measure the energy of a mixed state, you are guaranteed to observe one and only one energy. If you have a particle that is partly in the E₁ state and partly in the E₂ state, the way we interpret that is that there is a certain probability of measuring E₁ and a certain probability of measuring E₂. As soon as we measure it, the particle changes into a pure state again. This is called wavefunction collapse, which is the doorway to many of the philosophical questions that loom around quantum mechanics.

Clipped from: [0909.1469] Towards Quantum Superposition of Living Organisms

Title: Towards Quantum Superposition of Living Organisms

Authors: Oriol Romero-Isart, Mathieu L. Juan, Romain Quidant, J. Ignacio Cirac

The most striking feature of quantum mechanics is the existence of superposition states, where an object appears to be in different situations at the same time. Up to now, the existence of such states has been tested with small objects, like atoms, ions, electrons and photons, and even with molecules. Recently, it has been even possible to create superpositions of collections of photons, atoms, or Cooper pairs. Current progress in optomechanical systems may soon allow us to create superpositions of even larger objects, like micro-sized mirrors or cantilevers, and thus to test quantum mechanical phenomena at larger scales. Here we propose a method to cool down and create quantum superpositions of the motion of sub-wavelength, arbitrarily shaped dielectric objects trapped inside a high--finesse cavity at a very low pressure. Our method is ideally suited for the smallest living organisms, such as viruses, which survive under low vacuum pressures, and optically behave as dielectric objects. This opens up the possibility of testing the quantum nature of living organisms by creating quantum superposition states in very much the same spirit as the original Schr\"odinger's cat "gedanken" paradigm. We anticipate our essay to be a starting point to experimentally address fundamental questions, such as the role of life in quantum mechanics, and differences between many-world and Copenhagen interpretations.

Clipped from: Dr. Oriol Romero-Isart - MPQTheory

Dr. Oriol Romero-Isart

Sources:
Technology Review: Blogs: arXiv blog: How to Create Quantum Superpositions of Living Things
Schrödinger's cat - Wikipedia, the free encyclopedia
File:Schrodingers cat.svg - Wikipedia, the free encyclopedia
YouTube - Schrodinger's Cat for real
Skeptic's Play: Intro to the Quantum Measurement Problem
[0909.1469] Towards Quantum Superposition of Living Organisms
Skeptic's Play: Quantum superposition
[0909.1469] Towards Quantum Superposition of Living Organisms
Dr. Oriol Romero-Isart - MPQTheory
Related:
Virus en superposicion cuántica « La Singularidad Desnuda
Copenhagen interpretation - Wikipedia, the free encyclopedia