According to the British "Nature" magazine website, scientists use lasers to freeze molecules to near absolute zero, the first time a single molecule laser has cooled to such a low temperature. To control the material and chemical physics process, making quantum computer a big step forward. In the seventies and eighties of the last century, physicists were able to cool atoms to cryogenic temperatures very close to absolute zero. The basic principle is to use the laser to slow down the atom. When atoms are frozen to near absolute zero, they follow a special law of quantum mechanics. Vibrating in the state corresponding to their low energy level, which is used as a hypersensitive accelerometer and a quantum clock, the atoms themselves stick together to form a "super atom," the famous "Bose-Einstein Condensed. " It is more complicated for molecular refrigeration than for a single atom. Atoms can be cooled by a laser, because when the light particles from the laser beam are absorbed, the atom re-emits a photon, reducing kinetic energy. After thousands of such reactions lag, the atoms are frozen within a few tenths of an inch of absolute zero. But molecules are heavier than atoms and harder to react to lasers. Also, molecules store energy by means of atomic bonds and spin, spin, all of which make it harder for molecules to cool down. Edward & middot; Schumann and David DeMille at Yale University in the United States used state-of-the-art technology and several new technologies to freeze strontium fluoride (SrF) to only a few hundred micro-degrees Kelvin. The research team used a new method to make molecules in the same direction to achieve the overall cooling. First, they chose strontium fluoride, calculated to be less likely to vibrate and hinder refrigeration; they then chose a bunch of colored lasers to ensure that energy was absorbed by the molecule without spinning them; finally, they With a pre-frozen strontium fluoride, and achieved good results. This ultra-cold molecule helps scientists study the chemical properties of quantum mechanics. At very low temperatures, polar molecules can be thought of as tiny magnets with north and south poles. Researchers can use this property to create a reaction system in which extremely cold particles react with one another, and this is done with ultra-cold atoms Not enough. The current temperature is not yet at a minimum and the team is trying to cool the strontium fluoride to about 300 micro degrees Kelvin. The researchers said the main data show that it can achieve lower temperatures. If you further expand the laser cooling technology to molecules, you can make a variety of different molecules to achieve ultra-cold stability. Demier said the final super-cold material will be used in quantum computers. Due to the "magnet" character of the supercooled molecules, this means that molecules can react with each other through a magnetic field. So that they can perform classification of quantum computing, may break existing encoding and decoding of computers, to achieve the principle of quantum overlap and implication generated by the huge computing power. This is the largest supercomputer due to physical and chemical constraints and can not be achieved. Multi-Stage Centifugal Pump,Horizontal Multi-Stage Centrifugal Pump,Multi-Stage Centrifugal Water Pump Shenyang pump products sales co., LTD , https://www.syipsc.com
Single-molecule laser refrigeration for the first time close to absolute zero