From: Ben Goertzel
The paradox is as follows:
One does the EPR thing of creating two particles
with opposite spin. [...]
More or less, it is the experiment by Birgit Dopfer
(pdf on this page, unfortunately just in German)
http://www.quantum.univie.ac.at/publications/thesis/
[EMAIL PROTECTED]
To: everything-list@eskimo.com
Sent: Wednesday, October 12, 2005 9:59 PM
Subject: RE: Quantum theory of measurement
Now that you are experts on this, try your hand on this FTL
signalling device, http://arxiv.org/abs/quant-ph?0204108.
The author, Daniel Badagnani, is apparently
fixed z2. But this
means that this value must be communicated by the observer there.
- Original Message -
From: Hal Finney [EMAIL PROTECTED]
To: everything-list@eskimo.com
Sent: Thursday, October 13, 2005 03:59 AM
Subject: RE: Quantum theory of measurement
Now that you are experts
Hi,
Oops, I gave the wrong link
I said
Specifically, I'll refer to the quantum eraser thought experiment
summarized at
http://grad.physics.sunysb.edu/~amarch/
but I meant
http://www.dhushara.com/book/quantcos/qnonloc/eraser.htm
Anyway, the essential idea of the two experiments is the
Ben Goertzel writes about:
http://grad.physics.sunysb.edu/~amarch/
The questions I have regard the replacement of the Coincidence Counter (from
here on: CC) in the above experiment with a more complicated apparatus.
What if we replace the CC with one of the following:
1) a carefully
Hal,
What will the outcome be in these experiments?
It won't make any difference, because the CC is not used in the way you
imagine. It doesn't have to produce a record and it doesn't have to erase
any records.
OK, mea culpa, maybe I misunderstood the apparatus and it was not the CC
that
What if instead of throwing out the information you shoot it into a black
hole?
Then presumably the information is really gone so the result should be as if
the information were quantum erased??
Unless there are white holes of course!! ;-)
Yes but we are choosing which half to throw out in
Ben Goertzel writes:
Hal,
It won't make any difference, because the CC is not used in the way you
imagine. It doesn't have to produce a record and it doesn't have to erase
any records.
OK, mea culpa, maybe I misunderstood the apparatus and it was not the CC
that records
things, but
and |a,s_l,z. Then you do
get the Cos(delta(z) interference term.
- Original Message -
From: Hal Finney [EMAIL PROTECTED]
To: [EMAIL PROTECTED]; everything-list@eskimo.com
Sent: Wednesday, October 12, 2005 08:16 PM
Subject: Re: Quantum theory of measurement
Ben Goertzel writes about:
http
Hal Finney wrote:
Ben Goertzel writes:
Hal,
It won't make any difference, because the CC is not used in the way
you
imagine. It doesn't have to produce a record and it doesn't have to
erase
any records.
OK, mea culpa, maybe I misunderstood the apparatus and it was not the CC
that
From: Ben Goertzel
[...] but still the records
could be kept somewhere,
and one can ask what would happen
if the records were kept somewhere else [...]
Not sure, but the quote below - about the information
'in principle' - might be helpful.
The superposition of amplitudes is only valid if
Thanks very much Jesse!
You answered the question I *would have* asked had I rememberd my quantum
physics better ;-)
I think your answer is related to a paradox a friend mentioned to me.
The paradox is as follows:
One does the EPR thing of creating two particles with opposite spin. Send
one
Ben Goertzel wrote:
Thanks very much Jesse!
You answered the question I *would have* asked had I rememberd my quantum
physics better ;-)
I think your answer is related to a paradox a friend mentioned to me.
The paradox is as follows:
One does the EPR thing of creating two particles with
Ben Goertzel wrote:
My own understanding is that whether Fred, a pigeon or a printer is
involved
in the experiment should be basically irrelevant. That is, I don't think
registration in consciousness (whatever that means) is the important
thing, but rather registration in the sense of
: Wednesday, October 12, 2005 2:52 PM
Subject: RE: Quantum theory of measurement
What if instead of throwing out the information you shoot it into a
black
hole?
Then presumably the information is really gone so the result should be as
if
the information were quantum erased??
Unless
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