ZPEnergy.com - Research in a Vacuum: DARPA

Research in a Vacuum: DARPA Tries to Tap Elusive Casimir Effect for Breakthrough Technology

DARPA mainly hopes that research on this quantum quirk can produce futuristic microdevices

By Adam Marcus

Named for a Dutch physicist, the Casimir effect governs interactions of matter with the energy that is present in a vacuum. Success in harnessing this force could someday help researchers develop low-friction ballistics and even levitating objects that defy gravity. For now, the U.S. Defense Department's Defense Advanced Research Projects Agency (DARPA) has launched a two-year, $10-million project encouraging scientists to work on ways to manipulate this quirk of quantum electrodynamics.

Vacuums generally are thought to be voids, but Hendrik Casimir believed these pockets of nothing do indeed contain fluctuations of electromagnetic waves. He suggested, in work done in the 1940s with fellow Dutch physicist Dirk Polder, that two metal plates held apart in a vacuum could trap the waves, creating vacuum energy that, depending on the situation, could attract or repel the plates. As the boundaries of a region of vacuum move, the variation in vacuum energy (also called zero-point energy) leads to the Casimir effect. Recent research done at Harvard University, Vrije University Amsterdam and elsewhere has proved Casimir correct—and given some experimental underpinning to DARPA's request for research proposals.

Investigators from five institutions—Harvard, Yale University, the University of California, Riverside, and two national labs, Argonne and Los Alamos—received funding. DARPA will assess the groups' progress in early 2011 to see if any practical applications might emerge from the research. "If the program delivers, there's a good chance for a follow-on program to apply" the research, says Thomas Kenny, the DARPA physicist in charge of the initiative...

Full article: http://www.scientificamerican.com/article.cfm?id=darpa-casimir-effect-research


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