Forum for Science, Industry and Business

Sponsored by:     3M 
Search our Site:

 

Quantum teleportation between atomic systems over long distances

07.06.2013
Researchers have been able to teleport information from light to light at a quantum level for several years. In 2006, researchers at the Niels Bohr Institute succeeded in teleporting between light and gas atoms.
Now the research group has succeeded in teleporting information between two clouds of gas atoms and to carry out the teleportation – not just one or a few times, but successfully every single time. The results are published in the scientific journal, Nature Physics.

"It is a very important step for quantum information research to have achieved such stable results that every attempt will succeed," says Eugene Polzik, professor and head of the research center Quantop at the Niels Bohr Institute at the University of Copenhagen.

The experiments are conducted in the laboratories of the research group in the basement under the Niels Bohr Institute. There are two glass containers, each containing a cloud of billions of caesium gas atoms. The two glass containers are not connected to each other, but information is teleported from the one glass cloud to the other by means of laser light.

The light is sent into the first glass container and then that strange quantum phenomenon takes place, the light and gas become entangled. The fact that they are entangled means that they have established a quantum link – they are synchronised.

Both glass containers are enclosed in a chamber with a magnetic field and when the laser light (with a specific wavelength) hits the gas atoms, the outermost electrons in the atoms react –like magnetic needles – by pointing in the same direction. The direction can be up or down, and it is this direction that makes up quantum information, in the same way that regular computer information is made up of the numbers 0 and 1.
The gas now emits photons (light particles) containing quantum information. The light is sent on to the other gas container and the quantum information is now read from the light and registered by a detector. The signal from the detector is sent back to the first container and the direction of the atoms' electrons are adjusted in relation to the signal. This completes the teleportation from the second to the first container.

The experiments are carried out at room temperature and the gas atoms therefore move at a speed of 200 meters per second in the glass container, so they are constantly bumping into the glass wall and thus lose the information they have just been encoded with. But the research group has developed a solution for this.

"We use a coating of a kind of paraffin on the interior of the glass contains and it causes the gas atoms to not lose their coding, even if they bump into the glass wall," explains Professor Eugene Polzik. It sounds like an easy solution, but in reality it was complicated to develop the method.

Another element of the experiment was to develop the detector that registers the photons. Here the researchers developed a particularly sensitive detector that is very effective at detecting the photons. The experiments therefore works every single time.

But it is one thing to perform tests in a laboratory and quite another to apply it in wider society! In the experiment, the teleportation's range is ½ meter – hardly impressive in a world where information must be transported around the world in no time.

"The range of ½ meter is entirely due to the size of the laboratory," explains Eugene Polzik with a big smile and continues – "we could increase the range if we had the space and, in principle, we could teleport information, for example, to a satellite."

The stable results are an important step towards the quantum communication network of the future.

For more information contact:

Eugene Polzik, Professor
Quantum Optics
Niels Bohr Institute
University of Copenhagen
+45 3532-5424
+45 2338-2045
polzik@nbi.dk

Gertie Skaarup | EurekAlert!
Further information:
http://www.nbi.dk
http://www.nbi.ku.dk/

Further reports about: gas atoms laser light quantum computing quantum information

More articles from Physics and Astronomy:

nachricht First Juno science results supported by University of Leicester's Jupiter 'forecast'
26.05.2017 | University of Leicester

nachricht Measured for the first time: Direction of light waves changed by quantum effect
24.05.2017 | Vienna University of Technology

All articles from Physics and Astronomy >>>

The most recent press releases about innovation >>>

Die letzten 5 Focus-News des innovations-reports im Überblick:

Im Focus: Can the immune system be boosted against Staphylococcus aureus by delivery of messenger RNA?

Staphylococcus aureus is a feared pathogen (MRSA, multi-resistant S. aureus) due to frequent resistances against many antibiotics, especially in hospital infections. Researchers at the Paul-Ehrlich-Institut have identified immunological processes that prevent a successful immune response directed against the pathogenic agent. The delivery of bacterial proteins with RNA adjuvant or messenger RNA (mRNA) into immune cells allows the re-direction of the immune response towards an active defense against S. aureus. This could be of significant importance for the development of an effective vaccine. PLOS Pathogens has published these research results online on 25 May 2017.

Staphylococcus aureus (S. aureus) is a bacterium that colonizes by far more than half of the skin and the mucosa of adults, usually without causing infections....

Im Focus: A quantum walk of photons

Physicists from the University of Würzburg are capable of generating identical looking single light particles at the push of a button. Two new studies now demonstrate the potential this method holds.

The quantum computer has fuelled the imagination of scientists for decades: It is based on fundamentally different phenomena than a conventional computer....

Im Focus: Turmoil in sluggish electrons’ existence

An international team of physicists has monitored the scattering behaviour of electrons in a non-conducting material in real-time. Their insights could be beneficial for radiotherapy.

We can refer to electrons in non-conducting materials as ‘sluggish’. Typically, they remain fixed in a location, deep inside an atomic composite. It is hence...

Im Focus: Wafer-thin Magnetic Materials Developed for Future Quantum Technologies

Two-dimensional magnetic structures are regarded as a promising material for new types of data storage, since the magnetic properties of individual molecular building blocks can be investigated and modified. For the first time, researchers have now produced a wafer-thin ferrimagnet, in which molecules with different magnetic centers arrange themselves on a gold surface to form a checkerboard pattern. Scientists at the Swiss Nanoscience Institute at the University of Basel and the Paul Scherrer Institute published their findings in the journal Nature Communications.

Ferrimagnets are composed of two centers which are magnetized at different strengths and point in opposing directions. Two-dimensional, quasi-flat ferrimagnets...

Im Focus: World's thinnest hologram paves path to new 3-D world

Nano-hologram paves way for integration of 3-D holography into everyday electronics

An Australian-Chinese research team has created the world's thinnest hologram, paving the way towards the integration of 3D holography into everyday...

All Focus news of the innovation-report >>>

Anzeige

Anzeige

Event News

Marine Conservation: IASS Contributes to UN Ocean Conference in New York on 5-9 June

24.05.2017 | Event News

AWK Aachen Machine Tool Colloquium 2017: Internet of Production for Agile Enterprises

23.05.2017 | Event News

Dortmund MST Conference presents Individualized Healthcare Solutions with micro and nanotechnology

22.05.2017 | Event News

 
Latest News

How herpesviruses win the footrace against the immune system

26.05.2017 | Life Sciences

Water forms 'spine of hydration' around DNA, group finds

26.05.2017 | Life Sciences

First Juno science results supported by University of Leicester's Jupiter 'forecast'

26.05.2017 | Physics and Astronomy

VideoLinks
B2B-VideoLinks
More VideoLinks >>>