Patterns of noise--normally considered flaws--in images of an ultracold cloud of potassium provide the first-ever visual evidence of correlated ultracold atoms, a potentially useful tool for many applications, according to physicists at JILA, a joint institute of the National Institute of Standards and Technology (NIST) and the University of Colorado at Boulder.
Described in the March 21 online issue of Physical Review Letters,* the noise analysis method could, in principle, be used to identify and test the limits of entanglement, a phenomenon Einstein called "spooky action at a distance." With entangled atom pairs, for example, the properties of one atom instantaneously affect the properties of its mate, even when the two are physically separated by substantial distances. Such tests of the basic rules of quantum physics could be helpful, for example, in efforts to design quantum computers that would use the properties of individual neutral atoms as 1s and 0s for storing and processing data.
The method demonstrated at JILA also could enable scientists to "see," for the first time, other types of correlations between atoms in fermionic condensates, a new quantum state first created by the same JILA research group, in which thousands of pairs of atoms behave in unison. And it could perhaps be applied in highly sensitive measurement techniques using beams of entangled atoms.
Laura Ost | EurekAlert!
UNH scientists help provide first-ever views of elusive energy explosion
16.11.2018 | University of New Hampshire
NASA keeps watch over space explosions
16.11.2018 | NASA/Goddard Space Flight Center
Researchers at the University of New Hampshire have captured a difficult-to-view singular event involving "magnetic reconnection"--the process by which sparse particles and energy around Earth collide producing a quick but mighty explosion--in the Earth's magnetotail, the magnetic environment that trails behind the planet.
Magnetic reconnection has remained a bit of a mystery to scientists. They know it exists and have documented the effects that the energy explosions can...
Biochips have been developed at TU Wien (Vienna), on which tissue can be produced and examined. This allows supplying the tissue with different substances in a very controlled way.
Cultivating human cells in the Petri dish is not a big challenge today. Producing artificial tissue, however, permeated by fine blood vessels, is a much more...
Faster and secure data communication: This is the goal of a new joint project involving physicists from the University of Würzburg. The German Federal Ministry of Education and Research funds the project with 14.8 million euro.
In our digital world data security and secure communication are becoming more and more important. Quantum communication is a promising approach to achieve...
On Saturday, 10 November 2018, the research icebreaker Polarstern will leave its homeport of Bremerhaven, bound for Cape Town, South Africa.
When choosing materials to make something, trade-offs need to be made between a host of properties, such as thickness, stiffness and weight. Depending on the application in question, finding just the right balance is the difference between success and failure
Now, a team of Penn Engineers has demonstrated a new material they call "nanocardboard," an ultrathin equivalent of corrugated paper cardboard. A square...
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