Printer Friendly

Reaching a record low temperature.

It's getting colder in the laboratory. Physicists at the National Institute of Standards and Technology (NIST) in Gaithersburg, Md., have chilled atoms to 700 nanokelvins, a temperature barely above absolute zero. Although other researchers have reached lower temperatures either transiently or in one or two dimensions, this represents the lowest temperature yet attained involving the motion of atoms in three dimensions.

The NIST team achieved the new record using a technique borrowed from researchers at the Ecole Normale Superieure in Paris (SN: 7/16/94, p.47). William D. Phillips and his colleagues at NIST trapped cesium atoms in an "optical lattice" created by four intersecting laser beams. Oscillating back and forth in the "hollows" of this lattice, the trapped atoms reach a temperature close to 1 microkelvin. Reducing the laser intensity drives the temperature to 700 nK, slowing the atoms to an average velocity of 7 millimeters per second.
COPYRIGHT 1994 Science Service, Inc.
No portion of this article can be reproduced without the express written permission from the copyright holder.
Copyright 1994, Gale Group. All rights reserved. Gale Group is a Thomson Corporation Company.

Article Details
Printer friendly Cite/link Email Feedback
Title Annotation:National Institute of Standards and Technology use "optical lattice" to trap and slow atoms, chilling them to 700 nanokelvins
Publication:Science News
Article Type:Brief Article
Date:Sep 10, 1994
Previous Article:Putting electrons into orbit.
Next Article:Rooting around for missing carbon.

Related Articles
Stopping an atom in its tracks.
Chilling an atom in solitary confinement.
Record-breaking cold trap for pinning atoms.
A magnetic trampoline for cold atoms.
Matter waves: Be fruitful and multiply.
Black hole recipe: Slow light, swirl atoms.
Ultracold molecules form inside superatom.
Atom laser gets a full tank. (Physics).
Single atoms delivered on demand.

Terms of use | Copyright © 2017 Farlex, Inc. | Feedback | For webmasters