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quantum Hall effect
(redirected from Quantum Effects)

   Also found in: Wikipedia 0.02 sec.
quantum Hall effect [′kwän·təm ′hȯl i‚fekt]
(electronics)
A phenomenon exhibited by certain semiconductor devices at low temperatures and high magnetic fields, whereby the Hall resistance becomes precisely equal to (h/e2)/n, wherehis Planck's constant,eis the electronic charge, andnis either an integer or a rational fraction. Also known as von Klitzing effect.


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We can't tell nature to ignore quantum mechanics, so we might need to measure it and see what happens," says Graham Fleming, a chemist at the University of California, Berkeley, who coauthored a paper in the 2009 Annual Review of Physical Chemistry outlining recent studies showing quantum effects in photosynthesis.
Text Size The length of bonds connecting water molecules could demonstrate quantum effects and help explain some of water's weirdness.
Agilent's Roberto Favaretto, vice president and general manager, Europe/Middle East/Africa, presented the 2002 award to Bernard Barbara (France), Jonathan Friedman (USA), Dante Gatteschi (Italy), Roberta Sessoli (Italy) and Wolfgang Wernsdorfer (France) for revealing quantum effects in the magnetic dynamics of molecular nanomagnets.
 
 
 
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