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Author Topic:   Uncovering a Simulation
Modulous
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Posts: 7801
From: Manchester, UK
Joined: 05-01-2005


Message 21 of 118 (484783)
10-01-2008 5:44 PM
Reply to: Message 18 by Agobot
10-01-2008 2:13 PM


I do think the moon is there when we are not observing it.
And so do I. The moon is not made of perfectly isolated subatomic particles, so it interacts with itself and its environment. You understand how decoherence might be worth considering? To qutoe a recent physicist, Brian Greene:
quote:
"Decoherence forces much of the weirdness of quantum physics to 'leak' from large objects since, bit by bit, the quantum weirdness is carried away by the innumerable impinging particles from the environment."
Why do you think that your computer being completely black and completely white at the same time is not fucked up?
But it isn't.
That you are dead and alive at any moment in time?
But you aren't. Decoherence, decoherence, decoherence.
There may be some interesting arguments you could care to bring up against decoherence, but ignoring it doesn't seem to be a good strategy.

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 Message 18 by Agobot, posted 10-01-2008 2:13 PM Agobot has replied

Replies to this message:
 Message 22 by Agobot, posted 10-01-2008 6:33 PM Modulous has replied

  
Modulous
Member
Posts: 7801
From: Manchester, UK
Joined: 05-01-2005


Message 24 of 118 (484796)
10-01-2008 6:47 PM
Reply to: Message 22 by Agobot
10-01-2008 6:33 PM


Point me to a paper that says that decoherence is a done deal. Or that it solves the "observation/measurement" problem. It'd be appreaciated if you could point me to a site that states that the physics community has accepted decoherence as the definitive reason for the measurement/oserver problem.
There may be some interesting arguments you could care to bring up against decoherence, but ignoring it doesn't seem to be a good strategy.
This theory simply tries to disprove the observer's role in determining the state of the universe. QM tells us something peculiar about the nature of our reality and that we have a distinct role in defining the world around us. Get used to it, it's a fact.
Point me to a paper that says that what you said is a done deal.
What is not clear is what is an observer.
So why essentially assert that we are observers in your moon example? There are many other potential observers such as the planet earth and, well, everything else that interacts with the subatomic particles in the moon: Including other subatomic particles in the moon.


Observing the Progressive Decoherence of the “Meter” in a Quantum Measurement
Decoherence and the transition from quantum to classical
Edited by Modulous, : added some papers about decoherence

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 Message 22 by Agobot, posted 10-01-2008 6:33 PM Agobot has replied

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Modulous
Member
Posts: 7801
From: Manchester, UK
Joined: 05-01-2005


Message 28 of 118 (484804)
10-01-2008 7:20 PM
Reply to: Message 26 by Agobot
10-01-2008 7:00 PM


The double slit experiment that proved the wave-particle collapse:
Neither of those two articles is a paper which says that the concept that 'we have a distinct role in defining the world around us' is a done deal.

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 Message 26 by Agobot, posted 10-01-2008 7:00 PM Agobot has replied

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Modulous
Member
Posts: 7801
From: Manchester, UK
Joined: 05-01-2005


Message 31 of 118 (484811)
10-01-2008 7:35 PM
Reply to: Message 30 by Agobot
10-01-2008 7:28 PM


By done deal I meant "fact" and whether that fact is resolved by Many Worlds interpretation or superimposing the role of the observer is irrelevant.
So can you show me a paper which shows that the concept that 'we have a distinct role in defining the world around us' is a fact?

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Modulous
Member
Posts: 7801
From: Manchester, UK
Joined: 05-01-2005


Message 38 of 118 (484851)
10-02-2008 9:01 AM
Reply to: Message 32 by Agobot
10-02-2008 3:26 AM


Ignoring decoherence, for the win
I did already - the double slit experiment proves that we(the observers/measurers) have a distinct role in defining the "world" around us.
I submit that your wording was inaccurate. 'We' implies 'us humans'. The double slit experiment is not a paper (that is: the standards you expect off your opponents is greater than the standards you hold yourself to: I even gave you two papers on request), and it does not show as a fact that us humans have any particularly interesting role to play at all. You cannot sensibly discuss this topic whilst ignoring decoherence, which you ironically must do if your thesis is to stand at all.
I'm not so ignorant of quantum physics that I am unaware of the measurement problem, but you place significant weight in your own understanding of quantum physics. You sound like me when I was 14 and I had just read about this stuff for the first time. It might be an idea to keep an open mind about it at the moment, ask questions from the experts and avoid throwing your weight behind things so much.
"Upon measuring the location of the particle, the wave-function will randomly "collapse" to a sharply peaked function at some location, with the likelihood of any particular location equal to the squared amplitude of the wave-function there. The measurement will return a well-defined position, a property traditionally associated with particles."
"Moreover, since there exists no microscopic reality independent of observation(it says we have a distinctive role in defining the world around us), the realistic motion picture of the particle passing through the two slits does not exist in essence."
http://www.quantummotion.org/dse.html
Did you read the next paragraph? Where it says 'there exist two unnoticed deadly flaws in the demonstration.'?
There are basically two types of reactions when confronted with quantum mechanics:
1. Holy Crap, then that means there is no objective reality, consciousness is key, time travel is possible, we are gods in our own minds, blink and its all gone!
2. Wow, that's crazy. What does that mean? What do you mean we don't know? Are you telling me that this is just the way it is? Hmm, oh well - why did I expect to understand what the underlying nature of the cosmos actually means?
Some people start at 1, and move to 2. I don't think there are many people doing 2=>1 though.
Edited by Modulous, : No reason given.

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 Message 32 by Agobot, posted 10-02-2008 3:26 AM Agobot has replied

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