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Topic: Why Quantum Computing Is Bunk
Replies: 176   Last Post: Jun 10, 2007 12:30 AM

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 ZZBunker Posts: 940 Registered: 12/6/04
Re: Why Quantum Computing Is Bunk
Posted: May 24, 2007 4:56 PM

On May 19, 2:16 pm, Michael Press <rub...@pacbell.net> wrote:
>
>
>
>
>
> PD <TheDraperFam...@gmail.com> wrote:

> > On May 17, 6:38 pm, Michael Press <rub...@pacbell.net> wrote:
> > > In article

>
> > > Vend <ven...@virgilio.it> wrote:
> > > > On 16 Mag, 16:03, Mitchell Jones <mjo...@21cenlogic.com> wrote:
> > > > > ***{Fine. How do you know you did that, other than by counting the
> > > > > clicks on the photon detector? Maybe you actually released a million
> > > > > photons, and only got one click. --MJ}***

>
> > > > It's a well known fact (since Plank and Einstain) that photons have
> > > > quantized energy:
> > > > The energy of a single photon is equal to: hc/l, where h is the
> > > > Plank's constant, c is the speed of light in the vacuum and l is the
> > > > wavelength of the radiation.

>
> > > > When you desing a light source you can control the total emitted power
> > > > (total energy/time) and the wavelength (the 'color' of the light).
> > > > Since the total energy emitted in a given time interval is just the
> > > > sum of the energy of all photons emitted in that interval, you can
> > > > simply calculate the average number of photons per interval: n = El/
> > > > hc, where E is the total energy.

>
> > > > Therefore, by keeping a low total power and/or a low wavelength you
> > > > can archive a small number of photons per time interval. In
> > > > particular, you can desing the source so that it emits only one photon
> > > > in an interval much larger than the time required for the photon to
> > > > traverse your experimental setup.
> > > > Then you can be sure (with high probability) that there is at most one
> > > > photon at time traveling in your experimental system.

>
> > > This idea that we can model light as a traveling entity was what
> > > led Albert Einstein to write `On the Electrodynamics of Moving
> > > Bodies'.

>
> > That's a little squishy. Everybody knows that light travels,
>
> That it is something `everybody knows' is what makes it
> so interesting. If it is traveling we should be able to
> observe it travelling. Yes? Or else it is something other than
> the other kinds of things that travel in physics, in
> which case all bets are off. Thinking that light _is_ a
> photon imposes a billiard ball universe where it will
> not fit. You cannot have your cake and eat it to.
>

> > and has
> > known that for a half-dozen centuries at least. Calling it a
> > "traveling entity" doesn't add any meaning to that.

>
> Modeling it as a traveling entity is what we are
> offered by physics. This is exactly what I am talking
>

> > What prompted
> > Einstein was the peculiar form of Maxwell's equations that didn't
> > obviously satisfy invariance with respect to inertial reference frames
> > the same way that Newtonian mechanics did.

>
> Einstein tried to visualize himself traveling along
> with a beam of light and picturing the
> electro-magnetism field. He discovered that it is an
> impossible configuration with respect to the laws of
> electro-magnetism. _This_ is how he was led to consider
> the transformation laws for Maxwell's equations.
>

> > > An electromagnetic wave observed in a reference frame
> > > traveling with it is a configuration that utterly violates the
> > > laws of electricity and magnetism.

>
> > There is no reference frame traveling with the electromagnetic wave in
> > which you can observe it. I have no idea where you got the idea that
> > there was.

>
> That is my point. The attempt to visualize such a frame
> leads to an electro-magnetic field at variance with the
> observed laws of electro-magnetism. Hence, the model in
> which light travels has problems; it is convenient but
> ought not be taken seriously.
>

> > > Nobody has ever observed a
> > > photon.

>
> > That's just plain wrong.
>
> Show me an experiment that observes a photon.

There is no such experiment.
Logic actually made marginal progress in the 20th century.

Einstein proved that calculus is neither necessary nor sufficient
for light to exist.
Goedel proved that set theory is neither necessary nor sufficient
for axioms to exist.
Turing proved that AT&T is neither necessary nor sufficient
for dimensions to exist.
RNA proved that DNA is neither necessary nor sufficient
for evolution to exist.

>
> --
> Michael Press- Hide quoted text -
>
> - Show quoted text -

Date Subject Author
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