SNR calculations (was Re: setup.exe missing from FTP site)

Igor Peshansky pechtcha@cs.nyu.edu
Wed May 30 13:32:00 GMT 2007


On Tue, 29 May 2007, Warren Young wrote:

> Dave Korn wrote:
> >   Say, what is the square of a photon, anyway?
>
> One way to square photons is to make them pass through a sufficiently
> small square hole in an opaque plate.  The squared photons will undergo
> a diffraction distortion, so whether the resulting value is 1 or 0
> (photons visible or not) will depend on the angle between the hole and
> your observation apparatus.
>
> The basic technique has already been studied.  You can see a simulation
> of the results here:
>
> 	http://en.wikipedia.org/wiki/Image:Square_diffraction.jpg

My notion of a square photon is a photon that would not fit into a
photon-sized round hole.  I don't believe there is a way to achieve that
via diffraction...
	Igor
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