ultracold molecules

ultracold molecules

[¦əl·trə‚kōld ′mäl·ə‚kyülz]
(physics)
A collection of molecules cooled to a thermodynamic temperature below 1 millikelvin.
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Techniques for producing cold and ultracold molecules are enabling the study of chemical reactions and scattering at the quantum scattering limit with only a few partial waves contributing to the incident channel leading to the observation and even full control of state-to-state collisions in this regime.
The researchers found that the ultracold molecules were relatively long-lived and stable, resisting reactive collisions with other molecules.
Martin Zwierlein, professor of physics at MIT and a principal investigator in MIT's Research Laboratory of Electronics, says that while molecules are normally full of energy, vibrating and rotating and moving through space at a frenetic pace, the group's ultracold molecules have been effectively stilled -- cooled to average speeds of centimeters per second and prepared in their absolute lowest vibrational and rotational states.
Malinovskaya participated in a workshop on emerging topics in cold and ultracold molecules and their significance to the study of physics.
8220;Research into cold and ultracold molecules is at the forefront of quantum physics, where it is opening up an exciting array of opportunities for new scientific inquiry,” says Dr.
These dipole moments give researchers a way to manipulate the ultracold molecules.
The team used a laser to slice a big glob of ultracold molecules into 20 or so thin, pancakelike shapes.
The 21 articles in the 2006 edition of this annual series summarize recent research findings in atmospheric and aerosol science, the spectroscopy of ultracold molecules, and the novel features of surfaces.
Another team, including Jun Ye of the University of Colorado at Boulder, succeeded in making ultracold molecules of potassium-rubidium.
These new experiments have created a large, stable supply of ultracold molecules stationary enough to operate on.
Supermolecules Physicists induced clouds of trapped, ultracold molecules to form Bose-Einstein condensates.
Researchers created the first ultracold molecules and a superatom, or Bose-Einstein condensate, of hydrogen (153: 342; 154: 54).