News in Brief
BOSTON — Today’s nanoelectronics weather forecast: positively frigid.
Tiny electronic chips have been cooled to a record low temperature, dipping below a thousandth of a kelvin for the first time ever, scientists reported March 6 at a meeting of the American Physical Society.
To reach the frosty temperature, the scientists incorporated tiny bits of metal on the chip, which act...
News in Brief
A new experiment gives rubidium atoms a certain je ne sais quoi.
Scientists arranged individual atoms of the element rubidium into a variety of 3-D shapes, including the Eiffel Tower. The team used a laser to trap atoms in the arrangements, performing a hologram-style technique to encode the complex positions. And moveable, laser-based “tweezers” (SN: 5/12/18, p. 24) shifted atoms that...
Molecules are seriously chilling out. Scientists report the first cooling of molecules below a previously impassable milestone. The result, in which scientists cooled molecules down to tens of millionths of a degree, is a step toward reaching the ultracold temperatures already achievable with atoms, researchers report August 28 in Nature Physics.
Scientists regularly chill atoms to less...
Lowest temperature yet
A common pin dropped on a table from a height of one-eighth of an inch generates about 10 ergs of energy, obviously a minuscule amount. That 10 ergs raises temperature, and even that tiny amount is “much too much” to be allowed in the experiment during which Dr. Arthur Spohr of the Naval Research Laboratory reached the lowest temperature yet achieved — within...
A swarm of atoms in a Stanford lab has become the coldest stuff on Earth. At about 50 trillionths of a kelvin, the atoms’ temperature was about a tenth of the previous record.
The temperature of a sample depends on how fast its constituent components move relative to each other. Quantum physicist Mark Kasevich and his team started with a cold gas made up of about 100,000 tightly packed...