Re: Quantum Cryptography can not work
- From: Unruh <unruh-spam@xxxxxxxxxxxxxx>
- Date: Mon, 26 Feb 2007 01:01:26 +0100 (CET)
azeltsman2@xxxxxxxxxxx writes:
Hi All,
It seems to me, that Quantum Cryptography can not work. The flaw of it
is in the misunderstanding of the Physics involved, by its advocates.
Ah, yes, hundreds of physicists do not understand physics.
Some assume photon entanglement, which is an umpossibility. There is
no such thing as entanglement, period.
This is known as proof by blatant assertion. All it does is to demonstrate
that it is you that do not know physics.
Others assume that evesdropper has to read the message directly using
polarization filters. It is not so.
What if he uses a laser amplifier, making a number of identical
photones from initial one? And then sending one of them to the
Read up about the "no-cloning" theorem.
receiver? And having the rest of them split in two beams, polarization
of each of which determined using filter?
Polarizations are NOT complimentary variables in QM. The principle of
uncertainty does not apply to them. Which means, that you can measure
both with 100% precision.
Again, either complete ignorance of physics or trying to prove something by shouting
loudly enough. Plarization operators i for different Stokes parameters do not commute.
What do you think?
That you have convicingly displayed your ignorance.
es
.
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