Dear Richard,
AFAIK, Feynman never discussed this. It first shows up in Vaidman's
work, I may be wrong:
http://www.nature.com/news/1999/991216/pf/991216-3_pf.html
http://philsci-archive.pitt.edu/archive/00001108/00/kast-disHYP.pdf
Stephen
----- Original Message -----
From: "rmiller" <rmiller.domain.name.hidden>
To: "Stephen Paul King" <stephenk1.domain.name.hidden>;
<everything-list.domain.name.hidden>
Sent: Wednesday, June 29, 2005 12:23 AM
Subject: Re: Witnesses, Observer Moments and Memories of a Past
> At 10:31 PM 6/28/2005, Stephen Paul King wrote:
>>Dear Lee,
>>
>> Are you familiar with any of the experiments that have been performed
>> regarding "quantum counterfactuals" or "null measurements"? It turns out
>> that the fact that some particular measure *was not made* counts just as
>> much, and thus affects the results of a measurement, of an actual
>> measurement that was made. Thus information of any occurrence or
>> non-occurrence of a measure of a QM system, coded in an OM, will make a
>> difference that can not be hand waved away.
>> This is why I am introducing the notion of a witness.
>>
>> Interleaving...
> RM: I assume this is not associated with Feynman's "all possible
> histories" approach?
>
>
Received on Wed Jun 29 2005 - 00:47:43 PDT