Re: questions - double slit



Old Man wrote:
> "Quantum Mirror" <junebug@xxxxxxxx> wrote in message
> news:1116947742.026761.81160@xxxxxxxxxxxxxxxxxxxxxxxxxxxxxxx
>
> > "Bull***. Afshar measured "nothing". There were
> > no interactions, and accordingly, the resulting wave
> > function was unaltered. No surprise; as predicted
> > by QM."
> >
> > You have clearly shown you do not understand the PC as it applies to
> > complementarity rules which allow no welcher weg and wave in the same
> > experiment. Your aggressive banter covers your shallow inept grasp of
> > experimental quantum physics!
>
> A dishonest claim, based upon Quantum Mirror having
> snipped the following from Old Man's message,
>
> "Old Man never had any faith in the straw man that
> Afshar beat to a pulp. All interference patterns
> are modulated by a diffraction envelope. Particle
> nature modulates wave nature. Observed together,
> in the same experiment. Go figure ".

The pinhole diffraction creates an airy disk which the Fourier
transform of the lens reproduces perfectly at the far field. The wires
are placed at the calculated minima of the dual pinhole interference
pattern. There is no known physical explanation for the photons missing
the wires except interference. If you want to display your pompous
genius you could win the nobel by showing how the photons miss the wire
without interference, since this will be a new force of nature. Then
how the airy disk is recreated perfectly "after interference" at the
CCD. These are the relevant issues in the experiment and the photons
"not" being present on the wires is the information gained by probing
the spots where they must be without interference. It is a ingenious
method to extract information.


> Old Man was respondig to Quantum Mirror's statement:
>
> "We do not need to perturb the wavefucntion
> of a quantum particle in order to gain information
> about the ensemble to which it belongs."
>
> Old Man took "the ensemble to which it belongs" to mean
> the quantum numbers of the system. The wave function
> (phase), not being observable, is of no account.
>
> Old Man is under the impression that Quantum Mirror
> believes that those quantum numbers can be altered
> sans external interaction with the system. Is this so ?
>
> [Old Man]
>
>
> > "Clearly, force (a finite potential gradient) isn't
> > required to introduce a differential phase shift
> > between partial waves, but in that case, the
> > resulting interference pattern is merely shifted,
> > not destroyed, and, no one is the wiser for it"
> >
> > Huh? This has absolutely nothing to do with the experiment and shows
> > you have no idea of the relevant issues involved.
> >
> > "And yes, null measurements are of value: the 2
> > in 1 / r^2 for the electrostatic force is determined
> > to great precision by a null measurement, but that
> > goes hand in hand with a measurement of the
> > charge on the sphere.
> > Magnetic monopoles have never been observed.
> > What's your deduction ?"
> >
> > Speaking of straw men what is the relevance to this experiment?
> >

.

Quantcast