Proving an aspect of the AB effect: when Newton's Third Law doesn't wo
Date: Tuesday, December 04, 2007 @ 23:38:15 MST
By Miranda Marquit
One of the interesting
phenomena present in quantum mechanics is the Aharonov-Bohm (AB)
effect. The AB effect predicts that a charged particle, usually an
electron in experiments, shows effects from electromagnetic fields in
regions where the particle is excluded. This leads to the interesting
fact that, in electromagnetism, Newton’s Third Law of Motion doesn’t
always hold true.
Herman Batelaan explains to PhysOrg.com:
“If you want to move anything in the world around you, you need forces.
But in the Aharonov-Bohm effect, the electron reacts without any
forces. There is no force, but something happens.”
Batelaan, a scientist
at the University of Nebraska-Lincoln oversaw an experiment done by
graduate student, Adam Caprez, and Brett Barwick to demonstrate the
absence of forces in the AB effect. A description of the experiment,
and their results, is available in Physical Review Letters: “Macroscopic Test of the Aharonov-Bohm Effect.” ...
Full story: http://www.physorg.com/news115985359.html