Quantum physics: Flavors of entanglement

Sep 27, 2010
Innsbruck physicists exposed four entangled ions to a noisy environment. Credit: University of Innsbruck

The entanglement of quantum objects can take surprising forms. Quantum physicists at the University of Innsbruck have investigated several flavors of entanglement in four trapped ions and report their results in the journal Nature Physics. Their study promotes further developments towards quantum computing and a deeper understanding of the foundations of quantum mechanics.

Entanglement is a fascinating property connecting quantum systems. Albert Einstein called it the "spooky action at a distance". This bizarre coupling can link particles, even if they are located on opposite sides of the galaxy. The strength of their connections is behind the promising quantum computers, the dream machines capable of quick and efficient computations.

The team lead by Rainer Blatt at the Institute of Experimental Physics of the University of Innsbruck has been working very successfully towards the realization of a quantum computer. In their recent study, these physicists exposed four entangled ions to a noisy environment. “At the beginning the ions showed very strong connections,” says Julio Barreiro. “When exposed to the disturbing environment, the started a journey to the classical world. In this journey, their showed a variety of flavors or properties.”

Their results go far beyond what was previously investigated with two entangled particles since four particles can be connected in many more ways. This investigation forms an important basis for the understanding of entanglement under the presence of the disturbances of the environment and the boundary between the dissimilar quantum and classical worlds. The work has now been published in the journal .

As part of their study, the Innsbruck scientists have developed new theoretical tools for the description of entangled states and novel experimental techniques for the control of the particles and their environment.

Explore further: Entanglement made tangible

More information: Experimental multiparticle entanglement dynamics induced by decoherence. J. T. Barreiro, P. Schindler, O. Gühne, T. Monz, M. Chwalla, C. F. Roos, M. Hennrich, R. Blatt. Nature Physics. 27 September 2010. DOI:10.1038/NPHYS1781

Provided by University of Innsbruck

4.6 /5 (15 votes)

Related Stories

Physicist proposes method to teleport energy

Feb 05, 2010

(PhysOrg.com) -- Using the same quantum principles that enable the teleportation of information, a new proposal shows how it may be possible to teleport energy. By exploiting the quantum energy fluctuations ...

A solid case of entanglement

Jan 11, 2010

Physicists have finally managed to demonstrate quantum entanglement of spatially separated electrons in solid state circuitry.

Recommended for you

Entanglement made tangible

14 hours ago

EPFL scientists have designed a first-ever experiment for demonstrating quantum entanglement in the macroscopic realm. Unlike other such proposals, the experiment is relatively easy to set up and run with existing semiconductor ...

Putting the squeeze on quantum information

Sep 25, 2014

Canadian Institute for Advanced Research researchers have shown that information stored in quantum bits can be exponentially compressed without losing information. The achievement is an important proof of principle, and could ...

Are weak values quantum? Don't bet on it

Sep 24, 2014

(Phys.org) —New work asserts that a key technique used to probe quantum systems may not be so quantum after all, according to Perimeter postdoctoral researcher Joshua Combes and his colleague Christopher ...

User comments : 0