X-Message-Number: 21122
Date: Tue, 11 Feb 2003 07:40:24 -0500
From: Thomas Donaldson <>
Subject: CryoNet #21107 - #21120

For Michael Price:

From my own reading about quantum devices, the main thing that gives
them an advantage is the computations which occur BEFORE the results
are read out. If you read out the results you interfere with the
quantum system, breaking the characteristics that allowed quantum
computing. This doesn't mean you can't start it again on a different
problem (or even the same one), just that like when you burst a 
bubble you have to blow another one.

As for reading out the results none of the quantum computers I've
read about seem to find that a problem. The problem seems to be
that of working with a sufficient number of qubits to do meaningful
calculations.

As for differences between quantum coding and quantum computing,
of course. But I was pointing out that at least one quantum device
had been built by now, and so it would not be wise to assume that
others won't be coming down the line.
             
                 Best wishes and long long life for all,

                         Thomas Donaldson

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