Featured Research

from universities, journals, and other organizations

Raising the prospects for quantum levitation

Date:
April 18, 2012
Source:
American Institute of Physics
Summary:
An eerie quantum force may one day help separate the surfaces in tiny machines for frictionless movement. More than half-a-century ago, the Dutch theoretical physicist Hendrik Casimir calculated that two mirrors placed facing each other in a vacuum would attract. The mysterious force arises from the energy of virtual particles flitting into and out of existence, as described by quantum theory. Now a scientist in Japan, has predicted that in certain circumstances a reversal in the direction of the so-called Casimir force would be enough to levitate an extremely thin plate.

An eerie quantum force may one day help separate the surfaces in tiny machines for frictionless movement. More than half-a-century ago, the Dutch theoretical physicist Hendrik Casimir calculated that two mirrors placed facing each other in a vacuum would attract. The mysterious force arises from the energy of virtual particles flitting into and out of existence, as described by quantum theory. Now Norio Inui, a scientist from the University of Hyogo in Japan, has predicted that in certain circumstances a reversal in the direction of the so-called Casimir force would be enough to levitate an extremely thin plate.

Related Articles


His calculations are published in the American Institute of Physics' (AIP) Journal of Applied Physics.

The Casimir force pushes identical plates together, but changes in the geometry and material properties of one of the plates can reverse the direction of the force. Inui calculated that a nanometer-thick plate made from a material called yttrium iron garnet (YIG) could hover half a micrometer above a gold plate. One key finding is that the repulsive force increases as the YIG plate gets thinner.

This is convenient since the weight of the plate, and hence the magnitude of the force needed to levitate it, shrinks in tandem with the thickness. Right now the levitating plates exist solely in the theoretical realm.

As a next step, many key assumptions in the calculations will need to be experimentally tested. If the models stand up to further scrutiny, possible applications could include levitating the gyroscopes in micro-electro-mechanical systems (MEMS) and keeping the various components of nanomachines from sticking together.


Story Source:

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


Journal Reference:

  1. Norio Inui. Quantum levitation of a thin magnetodielectric plate on a metallic plate using the repulsive Casimir force. Journal of Applied Physics, 2012; 111 (7): 074304 DOI: 10.1063/1.3698619

Cite This Page:

American Institute of Physics. "Raising the prospects for quantum levitation." ScienceDaily. ScienceDaily, 18 April 2012. <www.sciencedaily.com/releases/2012/04/120418135132.htm>.
American Institute of Physics. (2012, April 18). Raising the prospects for quantum levitation. ScienceDaily. Retrieved November 27, 2014 from www.sciencedaily.com/releases/2012/04/120418135132.htm
American Institute of Physics. "Raising the prospects for quantum levitation." ScienceDaily. www.sciencedaily.com/releases/2012/04/120418135132.htm (accessed November 27, 2014).

Share This


More From ScienceDaily



More Matter & Energy News

Thursday, November 27, 2014

Featured Research

from universities, journals, and other organizations


Featured Videos

from AP, Reuters, AFP, and other news services

NASA's First 3-D Printer In Space Creates Its First Object

NASA's First 3-D Printer In Space Creates Its First Object

Newsy (Nov. 26, 2014) The International Space Station is now using a proof-of-concept 3D printer to test additive printing in a weightless, isolated environment. Video provided by Newsy
Powered by NewsLook.com
Bolivian Recycling Initiative Turns Plastic Waste Into School Furniture

Bolivian Recycling Initiative Turns Plastic Waste Into School Furniture

Reuters - Innovations Video Online (Nov. 26, 2014) Innovative recycling project in La Paz separates city waste and converts plastic garbage into school furniture made from 'plastiwood'. Tara Cleary reports. Video provided by Reuters
Powered by NewsLook.com
Blu-Ray Discs Getting Second Run As Solar Panels

Blu-Ray Discs Getting Second Run As Solar Panels

Newsy (Nov. 26, 2014) Researchers at Northwestern University are repurposing Blu-ray movies for better solar panel technology thanks to the discs' internal structures. Video provided by Newsy
Powered by NewsLook.com
Today's Prostheses Are More Capable Than Ever

Today's Prostheses Are More Capable Than Ever

Newsy (Nov. 26, 2014) Advances in prosthetics are making replacement body parts stronger and more lifelike than they’ve ever been. 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