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kurious
Aug19-04, 03:07 PM
http://www.quantum.univie.ac.at/res...matterwave/c60/


This weblink is about C60 buckyballs passing through a diffraction grating and showing wave-like behaviour.Since the buckyballs are moving quite slowly -
about 210 m/s would it be possible to fire a neutron beam through the buckyballs at right angles to their direction of travel and to get a neutron diffraction pattern of the buckyballs before and after they have passed through the grating,to see how they change.Such a procedure could yield information about how decoherence occurs.

kurious
Aug20-04, 02:56 PM
Suppose a cloud of 60 unbonded carbon atoms are fired simulataneously at the slits and the cloud has photons trapped in it corresponding to the energy a "hot" buckyball would radiate.We would expect an interference pattern to form
because the photons ,if detected, cannot tell us which individual carbon atom travelled through which slit.My point is this:
Decoherence probably doesn't happen for a "hot" buckyball because
it must be behaving like the cloud of unbonded carbon atoms - we have no way of knowing which carbon atoms in the ball radiate an individual photon. And if a radioactive carbon 14 atom was introduced into each buckyball we could in principle by using a detector at one of the slits find out which atom emitted an alpha particle and we would expect the interference pattern to disappear altogether.