Re: Quantum computing

Date: Tue, 9 Jan 1996 11:18:40 -0800
From: David Finkelstein <df4@prism.gatech.edu>
To: quantum-d@teleport.com
Subject: Re: Quantum computing

In the Heisenberg interpretation: The quantum computer is a large 
quantum system, not different in principle from a molecule or crystal. 
Keeping it isolated from the rest of the world is crucial and hard. 
One photon or cosmic ray interacting with it will destroy coherence. 
The act of programming it and setting input data is representyed by 
the initial ket. The running of the computation is represented by the 
unitary time evolution U(t)=exp(-iHt). The read-out is represented 
by the final bra. The amplitude for a particular transition is <f|U|i>.


On Thu, 4 Jan 1996, Mitchell Porter wrote:

> Does anyone feel up to an analysis of quantum computing from the point
> of view of the various interpretations? David Deutsch, who did the
> seminal work on quantum computers, is a many-worlder, and discusses
> the process from that perspective.
> --
> -mitch
> http://desire.apana.org.au/~qix
>