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

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Vend

Posts: 70
Registered: 1/9/07
Re: Why Quantum Computing Is Bunk
Posted: May 16, 2007 2:03 PM
  Click to see the message monospaced in plain text Plain Text   Click to reply to this topic Reply

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.



Date Subject Author
5/12/07
Read Why Quantum Computing Is Bunk
Traveler
5/12/07
Read Re: Why Quantum Computing Is Bunk
Phineas T Puddleduck
5/12/07
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Traveler
5/12/07
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Phineas T Puddleduck
5/12/07
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5/12/07
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5/12/07
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hanson
5/12/07
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Vend
5/12/07
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Traveler
5/12/07
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Phineas T Puddleduck
5/13/07
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Traveler
5/13/07
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5/13/07
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5/13/07
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T.H. Ray
5/13/07
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Traveler
5/13/07
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T.H. Ray
5/13/07
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Traveler
5/13/07
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Vend
5/13/07
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5/13/07
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John Sefton
5/13/07
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Vend
5/13/07
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Traveler
5/13/07
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Vend
5/14/07
Read Re: Why Quantum Computing Is Bunk
Traveler
5/14/07
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Vend
5/14/07
Read Re: Why Quantum Computing Is Bunk
John Sefton
5/14/07
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Vend
5/15/07
Read Re: Why Quantum Computing Is Bunk
Traveler
5/15/07
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PD
5/14/07
Read Re: Why Quantum Computing Is Bunk
Dr. David Kirkby
5/15/07
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Traveler
5/15/07
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Dr. David Kirkby
5/16/07
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Brian Quincy Hutchings
5/16/07
Read Re: Why Quantum Computing Is Bunk
Brian Quincy Hutchings
5/16/07
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Traveler
5/16/07
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5/16/07
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Brian Quincy Hutchings
5/17/07
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Michael Press
5/15/07
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Traveler
5/15/07
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Vend
5/17/07
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5/16/07
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5/20/07
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5/13/07
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T.H. Ray
5/15/07
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5/17/07
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5/17/07
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Traveler
5/18/07
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5/15/07
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5/16/07
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Dr. David Kirkby
5/16/07
Read Re: Why Quantum Computing Is Bunk
Mitchell Jones
5/16/07
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5/17/07
Read Re: Why Quantum Computing Is Bunk
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5/17/07
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5/16/07
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Vend
5/16/07
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Traveler
5/17/07
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5/18/07
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Vend
5/18/07
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5/19/07
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Mitchell Jones
5/19/07
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Vend
5/17/07
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5/18/07
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5/19/07
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5/19/07
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5/19/07
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5/19/07
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Vend
5/20/07
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5/20/07
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5/21/07
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5/21/07
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5/22/07
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5/22/07
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5/20/07
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5/21/07
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5/22/07
Read Why Michael Press does not know what he is talking about.
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5/22/07
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5/24/07
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5/24/07
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5/24/07
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5/24/07
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5/24/07
Read Blind and stupid
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5/24/07
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5/25/07
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5/25/07
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5/22/07
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5/22/07
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5/23/07
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5/22/07
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5/23/07
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5/23/07
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5/23/07
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5/24/07
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5/12/07
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5/12/07
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5/13/07
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5/13/07
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5/13/07
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5/16/07
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5/14/07
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