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Latest Bose–Einstein condensate Stories

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2010-05-02 08:33:57

Researchers isolate collection of "pure" or spin polarized positronium atoms for the first time Positronium is a short-lived system in which an electron and its anti-particle are bound together. In 2007, physicists at the University of California, Riverside created molecular positronium, a brand-new substance, in the laboratory. Now they have succeeded in isolating for the first time a sample of spin polarized positronium atoms. Study results appear this week in the journal Physical Review...

2010-02-17 14:05:00

Two University of Colorado at Boulder physicists are part of a collaborative team working with the U.S. Department of Energy's Brookhaven National Laboratory in New York that have created the hottest temperature matter ever measured in the universe -- 7.2 trillion degrees Fahrenheit. The team used Brookhaven's giant atom smasher, the Relativistic Heavy Ion Collider, or RHIC, to ram charged gold particles into each other billions of times, creating a "quark-gluon plasma" with a temperature...

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2010-02-02 09:51:42

First direct observation of exchange process in quantum gas Considerable progresses made in controlling quantum gases open up a new avenue to study chemical processes. Rudolf Grimm's research team has now succeeded in directly observing chemical exchange processes in an ultracold sample of cesium atoms and Feshbach molecules. They report on their findings in the journal Physical Review Letters. Complex processes, which to a large extent cannot be observed directly, determine when chemical...

2009-12-17 15:01:44

NIST physicists predict new form of soliton in ultracold gases Solitary waves that run a long distance without losing their shape or dying out are a special class of waves called solitons. These everlasting waves are exotic enough, but theoreticians at the Joint Quantum Institute (JQI) , a collaboration of the National Institute of Standards and Technology (NIST) and the University of Maryland, and their colleagues in India and the George Mason University, now believe that there may be a new...

2009-12-02 18:51:36

Achieving an important new capability in ultracold atomic gases, researchers at the Joint Quantum Institute, a collaboration of the National Institute of Standards and Technology (NIST) and the University of Maryland, have created "synthetic" magnetic fields for ultracold gas atoms, in effect "tricking" neutral atoms into acting as if they are electrically charged particles subjected to a real magnetic field. The demonstration, described in the latest issue of the journal Nature, not only...

2009-11-17 16:40:33

Killian lab creates Bose-Einstein condensate from strontium Everybody loves a race to the wire, even when the result is a tie. The great irony is the ultraprecise clocks that could result from this competition could probably break any tie. The Rice lab of physicist Tom Killian published a paper online this month demonstrating the long-sought creation of a Bose-Einstein condensate (BEC) of strontium atoms. BEC is a state of matter predicted by early 20th-century physicists Satyendra Nath Bose...

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2009-11-09 08:22:52

Cooling strontium could lead to increasingly precise clocks, quantum computers and ultracold chemistry Two independent teams have, for the first time, created Bose-Einstein condensates of strontium atoms. The ability to cool strontium to very low temperatures and control its motion could lead to increasingly precise clocks and may advance our progress toward quantum computers and novel experiments in ultracold chemistry. The new Bose-Einstein condensate is reported in two papers in Physical...

2009-10-22 14:49:26

Investigating mysterious data in ultracold gases of rubidium atoms, scientists at the Joint Quantum Institute of the National Institute of Standards and Technology (NIST) and the University of Maryland and their collaborators have found that properly tuned radio-frequency waves can influence how much the atoms attract or repel one another, opening up new ways to control their interactions. As the authors report* in an upcoming issue of Physical Review A, the radio-frequency (RF) radiation...

2009-09-03 23:30:00

Realization of an excited, strongly correlated many-body phase Hanns-Christoph Naegerl's research group has investigated how ultracold quantum gases behave in lower spatial dimensions. They successfully realized an exotic state, where, due to the laws of quantum mechanics, atoms align along a one-dimensional structure. A stable many-body phase with new quantum mechanical states is thereby produced even though the atoms are usually strongly attracted which would cause the system to collapse....

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2009-04-23 12:00:10

Scientists say the Rydberg molecule, a molecule that until now existed only in theory, has finally been created, BBC News reported. The molecule is formed through an elusive and extremely weak chemical bond between two atoms. Researchers reported in the journal Nature that the new type of bonding occurs when one of the two atoms in the molecule has an electron very far from its nucleus or center. Nobel prize-winning physicist Enrico Fermi developed fundamental quantum theories about how...