Featured Research

from universities, journals, and other organizations

Understanding Quantum Turbulence: Controllable Formation Of Quantum Turbulence In Ultra-cold Atom Gas

Date:
July 28, 2009
Source:
American Physical Society
Summary:
Scientists in Brazil report the controllable formation of quantum turbulence in an ultra-cold atom gas. The research makes it easier to characterize quantum turbulence -- and potentially even classical turbulence -- because it is possible to tune many characteristics of the cold-atom gas.

Scientists have imaged the vortices that form in the turbulent state of an ultra-cold atom gas.
Credit: Image copyright American Physical Society [Illustration: Adapted from E. A. L. Henn et al. Phys. Rev. Lett.)

Scientists in Brazil report the controllable formation of quantum turbulence in an ultra-cold atom gas. The results, which appear in the July 20 issue of Physical Review Letters and are highlighted in the APS journal Physics may make it easier to characterize quantum turbulence – and potentially even classical turbulence – because it is possible to tune many characteristics of the cold-atom gas.

Turbulence is considered a nuisance because it slows down boats and jars airplanes. But for hundreds of years, physicists have been fascinated with the notoriously difficult problem of how to describe this phenomenon, which involves the formation and disappearance of vortices – swirling regions in a gas or liquid– over many different length and time scales.

Turbulence can also occur in quantum fluids, such as ultra-cold atom gases and superfluid helium. In a quantum fluid, the motion of the vortices is quantized; and, because quantum fluids have zero viscosity, the vortices cannot easily disappear.

These properties make quantum turbulence more stable and easier to understand than classical turbulence. Now, Emanuel Henn and colleagues at the University of Sao Paulo in Brazil and the University of Florence in Italy have created quantum turbulence in a gas of ultra-cold rubidium atoms by shaking it up with a magnetic field. In this way, they are able to control the formation of vortices and generate many different kinds of turbulence to explore a number of questions relevant to both its quantum and classical forms.


Story Source:

The above story is based on materials provided by American Physical Society. Note: Materials may be edited for content and length.


Cite This Page:

American Physical Society. "Understanding Quantum Turbulence: Controllable Formation Of Quantum Turbulence In Ultra-cold Atom Gas." ScienceDaily. ScienceDaily, 28 July 2009. <www.sciencedaily.com/releases/2009/07/090720082642.htm>.
American Physical Society. (2009, July 28). Understanding Quantum Turbulence: Controllable Formation Of Quantum Turbulence In Ultra-cold Atom Gas. ScienceDaily. Retrieved October 21, 2014 from www.sciencedaily.com/releases/2009/07/090720082642.htm
American Physical Society. "Understanding Quantum Turbulence: Controllable Formation Of Quantum Turbulence In Ultra-cold Atom Gas." ScienceDaily. www.sciencedaily.com/releases/2009/07/090720082642.htm (accessed October 21, 2014).

Share This



More Computers & Math News

Tuesday, October 21, 2014

Featured Research

from universities, journals, and other organizations


Featured Videos

from AP, Reuters, AFP, and other news services

Japanese Scientists Unveil Floating 3D Projection

Japanese Scientists Unveil Floating 3D Projection

Reuters - Innovations Video Online (Oct. 20, 2014) Scientists in Tokyo have demonstrated what they say is the world's first 3D projection that floats in mid air. A laser that fires a pulse up to a thousand times a second superheats molecules in the air, creating a spark which can be guided to certain points in the air to shape what the human eye perceives as an image. Matthew Stock reports. Video provided by Reuters
Powered by NewsLook.com
Apple Enters Mobile Payment Business

Apple Enters Mobile Payment Business

AP (Oct. 20, 2014) Apple is making a strategic bet with the launch of Apple Pay, the mobile pay service aimed at turning your iPhone into your wallet. (Oct. 20) Video provided by AP
Powered by NewsLook.com
Apple Pay Goes Live

Apple Pay Goes Live

Reuters - Business Video Online (Oct. 20, 2014) Apple launches an ambitious new mobile service, Apple Pay, which aims to change the way consumers pay for goods and services, doing away with cash and traditional credit cards. Jeanne Yurman reports. Video provided by Reuters
Powered by NewsLook.com
Google To Protect Against Piracy ... At A Cost

Google To Protect Against Piracy ... At A Cost

Newsy (Oct. 20, 2014) Google is changing its search-engine results to protect content producers from piracy — for a price. Video provided by Newsy
Powered by NewsLook.com

Search ScienceDaily

Number of stories in archives: 140,361

Find with keyword(s):
Enter a keyword or phrase to search ScienceDaily for related topics and research stories.

Save/Print:
Share:

Breaking News:

Strange & Offbeat Stories


Space & Time

Matter & Energy

Computers & Math

In Other News

... from NewsDaily.com

Science News

Health News

Environment News

Technology News



Save/Print:
Share:

Free Subscriptions


Get the latest science news with ScienceDaily's free email newsletters, updated daily and weekly. Or view hourly updated newsfeeds in your RSS reader:

Get Social & Mobile


Keep up to date with the latest news from ScienceDaily via social networks and mobile apps:

Have Feedback?


Tell us what you think of ScienceDaily -- we welcome both positive and negative comments. Have any problems using the site? Questions?
Mobile: iPhone Android Web
Follow: Facebook Twitter Google+
Subscribe: RSS Feeds Email Newsletters
Latest Headlines Health & Medicine Mind & Brain Space & Time Matter & Energy Computers & Math Plants & Animals Earth & Climate Fossils & Ruins