From: Damien Broderick (thespike@earthlink.net)
Date: Wed Jan 08 2003 - 11:59:22 MST
scerir:
> Let us take Feynman 'literaly'.
> Now let us talk about the famous 'double slit' interference
> experiment. We can say that a particle (photon, electron, neutron,
> and the C-60-fullerene) goes through one slit, then goes 'back
> in time' through the same slit, and then forward through the other
> slit.
It goes backward as an anti-particle. Does it follow precisely the same
trajectory? If so, it annihilates with its earlier self. If not, it hits
some other particle in the general vicinity and annihilates. One or more of
the by-products of that small catastrophe might then pass through the other
slit, but the temporal symmetry is lost (I think).
Admittedly a photon is its own antiparticle. What happens then?
Damien Broderick
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