Re: Quantum Cryptography can not work

On Feb 25, 2:54 pm, Peter Pearson <ppear...@xxxxxxxxxxxxxxx> wrote:
As I understand it, you cannot clone photons, even with a
laser amplifier.
Why not?
In the realm of QM, the electric field of the light is its wave
function.
Only in the "Secondary Quantization" you discern separate photones.

I asked around (and got contradictory answers). Among
much unfamiliar stuff was the notion that the medium of your
laser amplifier inevitably has a nonzero probability of
spontaneous emission, which would preserve the necessary
uncertainty over the state of the original photon.

Well, that 'familiar stuff' does not passes the smaell test with me.
How on Earth that would be an Amplifier then?

If I recall correctly, this same anti-cloning principle
must be invoked in analysis of the "EPR Paradox" to prevent
faster-than-light transmission of information. Specifically,
one recipient's uncertainty about the state of the other
recipient's discriminator depends on his getting only one
chance to make a measurement on the photon he receives.

That is for sure nonsense, but it is quite smart of you to see
that it is the same way of thinking - the way that is propostrously
flawed,
as far as Physics goes.

To me, having quantum mechanics and special relativity
rescued from contradiction by a seemingly arbitrary detail
of quantum electrodynamics always smacked of a
deus-ex-machina ending.

Yes, I agree. It was a case of wishful thinking initially, and it has
become fraud now, with goal to steal public money.

es




.

Relevant Pages

  • Re: Quantum Cryptography can not work
    ... laser amplifier. ... the electric field of the light is its wave ... laser amplifier inevitably has a nonzero probability of ... chance to make a measurement on the photon he receives. ...
    (sci.crypt)
  • Re: Quantum Cryptography can not work
    ... laser amplifier. ... cryptography was invented I worked among laser physicists, ... chance to make a measurement on the photon he receives. ... It is NOT and arbitrary detail. ...
    (sci.crypt)
  • Re: Quantum Cryptography can not work
    ... laser amplifier. ... uncertainty over the state of the original photon. ... chance to make a measurement on the photon he receives. ... having quantum mechanics and special relativity ...
    (sci.crypt)
  • Re: Quantum Cryptography can not work
    ... laser amplifier. ... cryptography was invented I worked among laser physicists, ... spontaneous emission, ... the amplifier is more likely to emit a clone of the input photon than a photon in any other state. ...
    (sci.crypt)