Re: Physics questions

Date: Fri, 10 Nov 1995 14:51:19 -0800
From: Brian Josephson 
Reply to: quantum-d@teleport.com
To: quantum-d@teleport.com
Subject: QUANTUM-D: Re: Physics questions

On Tue, 7 Nov 1995, Stanley Klein wrote:

>                  ...As to Penrose. There have been volumes and volumes
> and volumes of articles written against Penrose. But I am sure he thinks
> that everyone else is wrong. It is to tricky for me to follow Penrose's
> arguments. My own feeling is very clear. I have never seen any example
> of creativity or perception or mathematical insight or any other aspect
> of human behaviour that can't be done by a digital computer.

My own feelings are also quite clear: physical systems can, in practice,
do calculations that Turing machines can't.  Re quantum theory relevance,
the type of calculation that a physical system can do may depend on the
type of system, and quantum systems may be able to do more than classical
ones e.g. by virtue of parallelism without accompanying noise.

Brian

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