Featured Research

from universities, journals, and other organizations

Putting A Freeze On Oscillator Vibrations

Date:
June 30, 2009
Source:
University of Oregon
Summary:
Physicists have successfully landed a one-two punch on a tiny glass sphere, refrigerating it in liquid helium and then dosing its perimeter with a laser beam, to bring its naturally occurring mechanical vibrations to a near standstill.

University of Oregon physicists have successfully landed a one-two punch on a tiny glass sphere, refrigerating it in liquid helium and then dosing its perimeter with a laser beam, to bring its naturally occurring mechanical vibrations to a near standstill.

The findings, published in Nature Physics, could boost advances in information processing that exploits special quantum properties and in precision-measurements for nanotechnology. The ability to freeze mechanical fluctuations, or vibrations, with a laser in so-called optomechanical oscillators, also opens a window on the little-explored transition between quantum and classical physics, said principal investigator Hailin Wang.

Wang, a member of the Oregon Center for Optics and a professor in the UO physics department, and his doctoral student Young-Shin Park performed the research under grants from the National Science Foundation and Army Research Laboratory through the Oregon Nanoscience and Microtechnologies Institute (ONAMI).

In nanotechnology, understanding phonons -- vibrations that carry energy -- is becoming increasingly important. For their project, Wang and Park purposely manufactured a deformed silica microsphere about 30 microns in diameter, about the size of a human hair.

A combination of cryogenic pre-cooling of the sphere to 1.4 Kelvin (minus 457.15 degrees Fahrenheit) and hitting the sphere's outer surface with a laser allowed researchers to extract energy from the mechanical oscillator and lower the level of phonon excitations to near 40 quanta. Ultimately, Wang said, the goal is to reduce that level, known as the average phonon occupation, to one quantum.

"Our goal is to get to and work with the quantum mechanical ground state in which there is very little excitation or displacement," Wang said. Reaching one quantum would require a temperature just a few thousandths of a degree from absolute zero (minus 459.67 degrees Fahrenheit).


Story Source:

The above story is based on materials provided by University of Oregon. Note: Materials may be edited for content and length.


Cite This Page:

University of Oregon. "Putting A Freeze On Oscillator Vibrations." ScienceDaily. ScienceDaily, 30 June 2009. <www.sciencedaily.com/releases/2009/06/090617131404.htm>.
University of Oregon. (2009, June 30). Putting A Freeze On Oscillator Vibrations. ScienceDaily. Retrieved April 23, 2014 from www.sciencedaily.com/releases/2009/06/090617131404.htm
University of Oregon. "Putting A Freeze On Oscillator Vibrations." ScienceDaily. www.sciencedaily.com/releases/2009/06/090617131404.htm (accessed April 23, 2014).

Share This



More Matter & Energy News

Wednesday, April 23, 2014

Featured Research

from universities, journals, and other organizations


Featured Videos

from AP, Reuters, AFP, and other news services

Is North Korea Planning Nuclear Test #4?

Is North Korea Planning Nuclear Test #4?

Newsy (Apr. 22, 2014) South Korean officials say North Korea is preparing to conduct another nuclear test, but is Pyongyang just bluffing this time? Video provided by Newsy
Powered by NewsLook.com
China Falls for 4x4s at Beijing Auto Show

China Falls for 4x4s at Beijing Auto Show

AFP (Apr. 22, 2014) The urban 4x4 is the latest must-have for Chinese drivers, whose conversion to the cult of the SUV is the talking point of this year's Beijing auto show. Duration: 00:40 Video provided by AFP
Powered by NewsLook.com
Hagel Gets Preview of New High-Tech Projects

Hagel Gets Preview of New High-Tech Projects

AP (Apr. 22, 2014) Defense Secretary Chuck Hagel is given hands-on demonstrations Tuesday of some of the newest research from DARPA _ the military's Defense Advanced Research Projects Agency program. (April 22) Video provided by AP
Powered by NewsLook.com
Lytro Introduces 'Illum,' A Professional Light-Field Camera

Lytro Introduces 'Illum,' A Professional Light-Field Camera

Newsy (Apr. 22, 2014) The light-field photography engineers at Lytro unveiled their next innovation: a professional DSLR-like camera called "Illum." 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:
from the past week

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