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Author Topic:   Biocentrism - How life creates the universe
PaulK
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Posts: 17827
Joined: 01-10-2003
Member Rating: 2.3


Message 16 of 62 (565195)
06-15-2010 12:55 PM
Reply to: Message 14 by MatterWave
06-15-2010 12:21 PM


quote:
You missed the target by a mile with that statement.
How odd, when that IS the standard version of the experiment.
quote:
If you don't read about them, you won't hear about it.
Have you seen the delayed choice experiment or the one done with the eraser?
Yes, I know of both of them, and I know that they DON'T show that the presence or absence of a conscious observer has any effect at all. In fact they don't even try to investigate that question.
It all comes down to the set-up of the experimental apparatus and the measurements it takes (come to that, if I remember correctly it isn't even necessary to take the measurements - so long as the information is available in principle).

This message is a reply to:
 Message 14 by MatterWave, posted 06-15-2010 12:21 PM MatterWave has replied

Replies to this message:
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AZPaul3
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Posts: 8553
From: Phoenix
Joined: 11-06-2006
Member Rating: 4.9


Message 17 of 62 (565198)
06-15-2010 1:05 PM
Reply to: Message 12 by PaulK
06-15-2010 10:08 AM


Double Trouble
not depending on whether someone is watching he slits
Things would be easier if this were true.
Both slits open. Detector ONLY on right slit, before right slit:
Detector off, interference pattern seen. Detector on, scatter pattern seen.
----------------------------------------
Move detector after slits but only on right slit. Same sequence, same result.
----------------------------------------
Use photons. Photons can be split into index photon (towards screen) and signal photon (90 deg. to index toward detector).
Detector off, interference pattern. Detector on, scatter pattern.
When the detector is off (not reading the signal photon) the index photon contributes to the the interference pattern.
When the signal photon is measured, the index photon results in scatter pattern.
----------------------------------------
Move the signal photon detector to 100 times the distance from slit to screen.
The index photon has reached the screen well before the signal photon has reached the detector.
Detector off, interference pattern. Detector on, scatter pattern.
How? Why?
----------------------------------------------
No time for specific references. They are on the web.
If you don't find them I'll look them up later. Work calls.

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Dr Jack
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Posts: 3514
From: Immigrant in the land of Deutsch
Joined: 07-14-2003
Member Rating: 8.3


Message 18 of 62 (565201)
06-15-2010 1:21 PM
Reply to: Message 17 by AZPaul3
06-15-2010 1:05 PM


Re: Double Trouble
All true. Although the "how? why?" you posit is understood (not by me). However, as PaulK rightly points out, a quantum observer does not mean a conscious observer.
Consciousness has no special place. That's just a popular misunderstanding.

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PaulK
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Posts: 17827
Joined: 01-10-2003
Member Rating: 2.3


Message 19 of 62 (565204)
06-15-2010 1:54 PM
Reply to: Message 17 by AZPaul3
06-15-2010 1:05 PM


Re: Double Trouble
The point you seem to be missing is that the detector is not itself a conscious observer.
What needs to be determined is whether it is the detector or a conscious observer that makes the difference, To the best of my knowledge the evidence points to the detector.
If you know of any experiments which really deal with the question of a conscious observer, and not simply variations in the experimental apparatus - and find a real effect - let me know.

This message is a reply to:
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cavediver
Member (Idle past 3670 days)
Posts: 4129
From: UK
Joined: 06-16-2005


Message 20 of 62 (565238)
06-15-2010 4:35 PM
Reply to: Message 17 by AZPaul3
06-15-2010 1:05 PM


Re: Double Trouble
PaulK writes:
not depending on whether someone is watching he slits
AZPaul3 writes:
Things would be easier if this were true.
Well, it is true (as the others have implied) so it must be easier
There is nothing in any of the weird and wonderful Aspect and quantum eraser experiments that even begins to suggest that consciousness and conscious observers have anything to do with the results of the experiments. They simply demonstrate the nature of relatively isolated yet broadly spread quantum states. Just as with EPR, the individual results are statistical and can in no way be used to signal FTL. Despite all appearances, the physics remains local.
Edited by cavediver, : removed half-constructed aside for later discussion

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MatterWave
Member (Idle past 5057 days)
Posts: 87
Joined: 01-15-2010


Message 21 of 62 (565241)
06-15-2010 5:02 PM
Reply to: Message 20 by cavediver
06-15-2010 4:35 PM


Re: Double Trouble
cavediver writes:
There is nothing in any of the weird and wonderful Aspect and quantum eraser experiments that even begins to suggest that consciousness and conscious observers have anything to do with the results of the experiments.
Yeah, it's not the observer, but the observer's ability to obtain information about the which-path. How is that different?
The eraser was specifically designed and implemented several times at different locations to highlight the fact that the universe is participatory.
Just as with EPR, the individual results are statistical and can in no way be used to signal FTL. Despite all appearances, the physics remains local.
If you were to finish that sentence, you'd have to admit that statistics is all that exists in that "local universe".
Edited by MatterWave, : No reason given.

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MatterWave
Member (Idle past 5057 days)
Posts: 87
Joined: 01-15-2010


Message 22 of 62 (565242)
06-15-2010 5:04 PM
Reply to: Message 13 by Wounded King
06-15-2010 10:29 AM


Wounded King writes:
As I understand it the important elements of the double slit experiment in terms of QM doesn't simply depend on their being one or two slits. If a measurement is made to determine which slit the particle passed through then the interference pattern vanishes. I agree that a conscious observe is not necessarily part of the equation but 'watching the slits', or any other way of determining which-way information, does remove the interference pattern.
Spot on.

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MatterWave
Member (Idle past 5057 days)
Posts: 87
Joined: 01-15-2010


Message 23 of 62 (565246)
06-15-2010 5:09 PM
Reply to: Message 16 by PaulK
06-15-2010 12:55 PM


PaulK writes:
Yes, I know of both of them, and I know that they DON'T show that the presence or absence of a conscious observer has any effect at all. In fact they don't even try to investigate that question.
Forget about the observer. We are talking about the ability to know.
Yes, I know of both of them, and I know that they DON'T show that the presence or absence of a conscious observer has any effect at all. In fact they don't even try to investigate that question.
The ability to know belongs to the observer. This is the sole causal factor in the delayed choice experiment.

This message is a reply to:
 Message 16 by PaulK, posted 06-15-2010 12:55 PM PaulK has replied

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Taq
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Posts: 10077
Joined: 03-06-2009
Member Rating: 5.2


Message 24 of 62 (565248)
06-15-2010 5:16 PM
Reply to: Message 21 by MatterWave
06-15-2010 5:02 PM


Re: Double Trouble
Yeah, it's not the observer, but the observer's ability to obtain information about the which-path. How is that different?
An unconscious detector is capable of collapsing the wave function of light. Therefore, a consciousness is not required. It is that simple. The same would happen if a dust particle accidently and without conscious control floated into the slit and absorbed a photon.

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 Message 21 by MatterWave, posted 06-15-2010 5:02 PM MatterWave has replied

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MatterWave
Member (Idle past 5057 days)
Posts: 87
Joined: 01-15-2010


Message 25 of 62 (565252)
06-15-2010 5:22 PM
Reply to: Message 24 by Taq
06-15-2010 5:16 PM


Re: Double Trouble
Taq writes:
An unconscious detector is capable of collapsing the wave function of light. Therefore, a consciousness is not required. It is that simple. The same would happen if a dust particle accidently and without conscious control floated into the slit and absorbed a photon.
Yeah, it's not the observer, but the observer's ability to obtain information about the which-path. How is that different?
An unconscious detector is capable of collapsing the wave function of light. Therefore, a consciousness is not required. It is that simple. The same would happen if a dust particle accidently and without conscious control floated into the slit and absorbed a photon.
We are not talking about the standard twin slit, where things aren't THAT obvious but of the Delayed choice experiment. Did i anywhere seem to imply i was talking about the double slit experiment? Because in every post i made in this thread i mentioned the DCE and the quantum eraser. Hmmmm....

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PaulK
Member
Posts: 17827
Joined: 01-10-2003
Member Rating: 2.3


Message 26 of 62 (565258)
06-15-2010 5:42 PM
Reply to: Message 23 by MatterWave
06-15-2010 5:09 PM


quote:
Forget about the observer. We are talking about the ability to know.
So long as we agree that "the ability to know" only refers to the availability of information, and not to conscious knowledge. Because that is so far as the experiments actually go.
quote:
The ability to know belongs to the observer. This is the sole causal factor in the delayed choice experiment.
The experiment does not indicate that there is any causal factor other than the arrangement of the experimental apparatus.

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cavediver
Member (Idle past 3670 days)
Posts: 4129
From: UK
Joined: 06-16-2005


Message 27 of 62 (565259)
06-15-2010 5:42 PM
Reply to: Message 21 by MatterWave
06-15-2010 5:02 PM


Re: Double Trouble
The eraser was specifically designed and implemented several times at different locations to highlight the fact that the universe is participatory.
Nonsense - it shows nothing of the sort (of course, it quite possibly was implemented in the hopes of showing this but that just shows the delusion inherrent in this subject.) The results of the eraser do not sufficiently differentiate between quantum interpretations to prmote one in favour of another. The eraser behvaviour is classic quantum mechanics and would be problematic were it not observed.
If you were to finish that sentence, you'd have to admit that statistics is all that exists in that "local universe".
I would never "admit" something in such loose language and terminology.

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New Cat's Eye
Inactive Member


Message 28 of 62 (565260)
06-15-2010 5:45 PM
Reply to: Message 25 by MatterWave
06-15-2010 5:22 PM


Re: Double Trouble
the DCE and the quantum eraser
What are those? links please...

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 Message 25 by MatterWave, posted 06-15-2010 5:22 PM MatterWave has not replied

  
MatterWave
Member (Idle past 5057 days)
Posts: 87
Joined: 01-15-2010


Message 29 of 62 (565271)
06-15-2010 6:17 PM
Reply to: Message 27 by cavediver
06-15-2010 5:42 PM


Re: Double Trouble
cavediver writes:
Nonsense - it shows nothing of the sort (of course, it quite possibly was implemented in the hopes of showing this but that just shows the delusion inherrent in this subject.) The results of the eraser do not sufficiently differentiate between quantum interpretations to prmote one in favour of another. The eraser behvaviour is classic quantum mechanics and would be problematic were it not observed.
So you actually have no other explanation than "complementarity holds", "it's just the statistical nature of qm". Which interpretation can explain better why the interference pattern disappears when which-path information is obtained? And which interpretation can explain better why when you "erase" the which-path information, the interference pattern re-appears? Just saying "nonsense" doesn't mean anything.
cavediver writes:
I would never "admit" something in such loose language and terminology.
This is not the forum of CERN and readers need to be aware what is being discussed.
Edited by MatterWave, : No reason given.
Edited by MatterWave, : Format of message

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AZPaul3
Member
Posts: 8553
From: Phoenix
Joined: 11-06-2006
Member Rating: 4.9


Message 30 of 62 (565313)
06-16-2010 1:00 AM
Reply to: Message 19 by PaulK
06-15-2010 1:54 PM


Re: Double Trouble
What needs to be determined is whether it is the detector or a conscious observer that makes the difference, To the best of my knowledge the evidence points to the detector.
So true.
That's what I get for being rushed and being unclear in my response.
What I was responding to was
Message 12
Specifically,
The "double slit" experiment shows particle-like behaviour when one slit is open and wave-like behaviour when both are open, not depending on whether someone is watching he slits.
Both slits are open and, depending on whether the detector is on/off the interference (wave) or scatter (particle) pattern are seen.
I do not know of any experiment attempting to separate detection from conscious observation.
I suspect the results will not change. IMO, it is the act of "detection" not "conscious observation" that breaks the interference pattern. A conscious mind does not appear to be necessary for the universe to exist ... or evolve.

This message is a reply to:
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