Achievement Could Improve Understanding of Superconductivity
The images above show the creation of ultracold molecules during the JILA experiments. Left -- A rainbow color scale indicates the numbers of ultracold gaseous potassium (K40) atoms in the vacuum chamber in two different fermion states. White areas have the most atoms, blue areas have the fewest.
Center --After a carefully tuned magnetic field is scanned over the chamber, 50 percent of the atoms "disappear." About half the atoms pair up into loosely bound molecules and are now bosons with different states not detected by the experimental set up.
Right--A low-energy radio wave is directed at the chamber. The molecular bonds are broken and the atoms reappear in a third fermion state (fuzzy blue area in center of image).
A team of researchers at JILA, a joint institute of the Commerce Department’s National Institute of Standards and Technology (NIST) and the University of Colorado at Boulder, has done the physics equivalent of efficiently turning yin into yang. They changed individual potassium atoms belonging to a class of particles called fermions into molecules that are part of a fundamentally different class of particles known as bosons. Though the transformation lasts only a millisecond, the implications may be long lasting.
The work, reported in tomorrow’s edition of the journal Nature, is an important step toward creating a “super molecule,” a blend of thousands of molecules acting in unison that would provide physicists with an excellent tool for studying molecular quantum mechanics and superconductivity. Creation of a “super atom” (known as a Bose-Einstein condensate or BEC; see www.bec.nist.gov for more information) earned another research team at JILA the 2001 Nobel Prize in physics.
Fred McGehan | NIST
Spintronics: Researchers show how to make non-magnetic materials magnetic
06.08.2020 | Martin-Luther-Universität Halle-Wittenberg
Manifestation of quantum distance in flat band materials
05.08.2020 | Institute for Basic Science
Scientists at the Fraunhofer Institute for Laser Technology ILT have come up with a striking new addition to contact stamping technologies in the ERDF research project ScanCut. In collaboration with industry partners from North Rhine-Westphalia, the Aachen-based team of researchers developed a hybrid manufacturing process for the laser cutting of thin-walled metal strips. This new process makes it possible to fabricate even the tiniest details of contact parts in an eco-friendly, high-precision and efficient manner.
Plug connectors are tiny and, at first glance, unremarkable – yet modern vehicles would be unable to function without them. Several thousand plug connectors...
An international research team has found a new approach that may be able to reduce bone loss in osteoporosis and maintain bone health.
Osteoporosis is the most common age-related bone disease which affects hundreds of millions of individuals worldwide. It is estimated that one in three women...
Traditional single-cell sequencing methods help to reveal insights about cellular differences and functions - but they do this with static snapshots only...
“Core-shell” clusters pave the way for new efficient nanomaterials that make catalysts, magnetic and laser sensors or measuring devices for detecting electromagnetic radiation more efficient.
Whether in innovative high-tech materials, more powerful computer chips, pharmaceuticals or in the field of renewable energies, nanoparticles – smallest...
An international research team with Prof. Cornelia Denz from the Institute of Applied Physics at the University of Münster develop for the first time light fields using caustics that do not change during propagation. With the new method, the physicists cleverly exploit light structures that can be seen in rainbows or when light is transmitted through drinking glasses.
Modern applications as high resolution microsopy or micro- or nanoscale material processing require customized laser beams that do not change during...
23.07.2020 | Event News
21.07.2020 | Event News
07.07.2020 | Event News
06.08.2020 | Earth Sciences
06.08.2020 | Power and Electrical Engineering
06.08.2020 | Life Sciences