Featured Research

from universities, journals, and other organizations

New method proposed for detecting gravitational waves from ends of universe

Date:
May 16, 2013
Source:
University of Nevada, Reno
Summary:
A new window into the nature of the universe may be possible with a device proposed by scientists that would detect elusive gravity waves from the other end of the cosmos.

Andrew Geraci, assistant professor in the University of Nevada, Reno physics department, demonstrates an apparatus that is of part of an experiment that uses similar technology to his gravitational wave detector.
Credit: Mike Wolterbeek, University of Nevada, Reno

A new window into the nature of the universe may be possible with a device proposed by scientists at the University of Nevada, Reno and Stanford University that would detect elusive gravity waves from the other end of the cosmos. Their paper describing the device and process was published in the physics journal Physical Review Letters.

Related Articles


"Gravitational waves represent one of the missing pieces of Einstein's theory of general relativity," Andrew Geraci, University of Nevada, Reno physics assistant professor, said. "While there is a global effort already out there to find gravitational waves, our proposed method is an alternate approach with greater sensitivity in a significantly smaller device.

"Our detector is complementary to existing gravitational wave detectors, in that it is more sensitive to sources in a higher frequency band, so we could see signals that other detectors might potentially miss."

Geraci and his colleague Asimina Arvanitaki, a post-doctoral fellow in the physics department at Stanford University, propose using a small, laser-cooled, tunable sensor that "floats" in an optical cavity so it is not affected by friction. Geraci is seeking funding to begin building a small prototype in the next year.

"Gravity waves propagate from the remote corners of our universe, they stretch and squeeze the fabric of space-time," Geraci said. "A passing gravity wave changes the physically measured distance between two test masses -- small discs or spheres. In our approach, such a mass experiences minimal friction and therefore is very sensitive to small forces."

While indirect evidence for gravity waves was obtained by studying the changing orbital period of a neutron star binary, resulting in the 1993 Nobel Prize in Physics, gravity waves have yet to be directly observed.

"Directly detecting gravitational waves from astrophysical sources enables a new type of astronomy, which can give us "pictures" of the sky analogous to what we have by using telescopes," Geraci said. "In this way the invention of a gravitational wave detector, which lets us "see" the universe through gravity waves, is analogous to the invention of the telescope, which let us see the universe using light. Having such detectors will allow us to learn more about astrophysical objects in our universe, such as black holes."

The approach the authors describe can exceed the sensitivity of next-generation gravitational wave observatories by up to an order of magnitude in the frequency range of 50 to 300 kilohertz.

Their paper, "Detecting high-frequency gravitational waves with optically levitated sensors," appeared in Physical Review Letters, a publication of the physics organization American Physical Society.

Geraci also presented his research at the annual American Physical Society Meeting in Denver in April. The meeting is attended by particle physicists, nuclear physicists and astrophysicists to share new research results and insights.


Story Source:

The above story is based on materials provided by University of Nevada, Reno. The original article was written by Mike Wolterbeek. Note: Materials may be edited for content and length.


Journal Reference:

  1. Asimina Arvanitaki, Andrew A. Geraci. Detecting High-Frequency Gravitational Waves with Optically Levitated Sensors. Physical Review Letters, 2013; 110 (7) DOI: 10.1103/PhysRevLett.110.071105

Cite This Page:

University of Nevada, Reno. "New method proposed for detecting gravitational waves from ends of universe." ScienceDaily. ScienceDaily, 16 May 2013. <www.sciencedaily.com/releases/2013/05/130516161739.htm>.
University of Nevada, Reno. (2013, May 16). New method proposed for detecting gravitational waves from ends of universe. ScienceDaily. Retrieved November 23, 2014 from www.sciencedaily.com/releases/2013/05/130516161739.htm
University of Nevada, Reno. "New method proposed for detecting gravitational waves from ends of universe." ScienceDaily. www.sciencedaily.com/releases/2013/05/130516161739.htm (accessed November 23, 2014).

Share This


More From ScienceDaily



More Matter & Energy News

Sunday, November 23, 2014

Featured Research

from universities, journals, and other organizations


Featured Videos

from AP, Reuters, AFP, and other news services

Toyota's Hydrogen Fuel-Cell Green Car Soon Available in the US

Toyota's Hydrogen Fuel-Cell Green Car Soon Available in the US

AFP (Nov. 21, 2014) Toyota presented its hydrogen fuel-cell compact car called "Mirai" to US consumers at the Los Angeles auto show. The car should go on sale in 2015 for around $60.000. It combines stored hydrogen with oxygen to generate its own power. Duration: 01:18 Video provided by AFP
Powered by NewsLook.com
Google Announces Improvements To Balloon-Borne Wi-Fi Project

Google Announces Improvements To Balloon-Borne Wi-Fi Project

Newsy (Nov. 21, 2014) In a blog post, Google said its balloons have traveled 3 million kilometers since the start of Project Loon. Video provided by Newsy
Powered by NewsLook.com
Raw: Paralyzed Marine Walks With Robotic Braces

Raw: Paralyzed Marine Walks With Robotic Braces

AP (Nov. 21, 2014) Marine Corps officials say a special operations officer left paralyzed by a sniper's bullet in Afghanistan walked using robotic leg braces in a ceremony to award him a Bronze Star. (Nov. 21) Video provided by AP
Powered by NewsLook.com
British 'Bio-Bus' Is Powered By Human Waste

British 'Bio-Bus' Is Powered By Human Waste

Buzz60 (Nov. 21, 2014) British company GENeco debuted what its calling the Bio-Bus, a bus fueled entirely by biomethane gas produced from food scraps and sewage. Jen Markham explains. Video provided by Buzz60
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