Time to revisit week 6 and all associated mind-boggles… let’s first set it all out, establish our problem.
So.. individual photons are fired, one at a time, at a board with two slits, and are registered by a sensor-board behind these slits. Over time, the scattered distribution of previously-fired photons begin to take the shape of a wave pattern. The brightest points on the sensor board are not directly behind each of the slits.. the photons are reaching places that would seem impossible, if they were travelling as discrete, solid particles. So the theory is that the photons are behaving like waves, and must be going through both holes simultaneously, colliding with themselves and scattering to form the wave pattern.
The plot thickens, for as soon as we place a sensor at the slits, to see which hole the photon ends up travelling through, the photons travel straight through one hole and the wave pattern is gone. It is as if the photons “know” we are observing them, and are “forced” to “choose” one slit over the other, rather than colliding with themselves.
This is the fundamental problem, it seems. There are numerous interpretations and explanations for why the experiment turns out this way, but the only theory I am mildly familiar with is the Copenhagen interpretation. According to this theory, discrete particles do not exist at particular points in space and time until we observe them. The presence of a conscious observer is said to collapse the wave function, forcing the random clouds and waves of probability to become solid, certain, concrete particles.
The world is calculated as we move through it, and parts of it unravel, dissolve into a realm of probabilities when no conscious being is present. This interpretation seems to lend itself towards an idealist conception of reality, rather than a materialist one, for it denies material (particles) any existence independent of mind… the particles dissipate without a conscious observer, and hence they are mind-relative. The wash of probabilities that ‘exist’ outside the realm of consciousness simply become part of a matrix, a set of random variables that are calculated by our collective, transpersonal self, or a machine, or something to this effect.
This all seems fairly good, fairly coherent and logical. But I think we run into problems with the Copenhagen interpretation when we examine ‘consciousness’ more closely. What are the limits of my consciousness, in relation to this matrix… how much of the world can I collapse at any one time? For instance, If I look at the sky, am I collapsing every single photon between my retinas and the moon? Between my eyes and Alpha Centauri? Between my mind and the theoretical end of the universe?
Or what if I step out into the street and feel a breeze against my skin? Experiencing this breeze has collapsed it into a set of discrete air molecules in motion, colliding with each other, etc. Now.. where does the breeze come from? Hot air rises up, creating a vacuum for cooler air to move in, and there are currents of molecules moving all over the place, crashing into each other, forming a long causal chain, and so, if I’m experiencing the breeze, it had to come from somewhere — did I just collapse particles on the other side of the world, which were ultimately responsible for creating the breeze that I perceive when walking down the street? If the particles touching my skin have collapsed, if they’ve “chosen” where they end up, then this necessarily dictates where the surrounding particles are located, and where the particles surrounding the surrounding particles are located, and so on. It’s like sudoku. The collapsed particles are certain, set in concrete, like the initial numbers you’re given with in a sudoku grid. But based on these certainties, you can figure out the values of every blank space, and there is only *one* correct answer.. so there is no longer any randomness. Perhaps this means that great proportions of the earth *are* collapsed most of the time, and do behave like particles, most of the time..
But then again, this all rests on the idea that wind is the product of particles in motion… if it’s all the product of a collective mind, then particles are irrelevant, and a breeze can exist regardless.
Then there’s the problem with degrees of consciousness, and whether a cat, or a rat or a spider is capable of collapsing the wave function, in which case, perhaps the world is swimming with conscious minds and nearly everything is collapsed. If not, then we’re suggesting that human beings alone have the capacity to understand the world and collapse it, while animals themselves dissolve into probability waves while we’re not watching. That’s a bit too anthropocentric and Descartes-esque for my taste..
And then, there’s a bigger logical problem that I am still troubled by. We’re saying that when we’re not looking, particles break down into waves and don’t exist at any particular point in space or time. Massive paradox here, in that we can never know what’s happening without observing. Obviously it becomes more complex when you look at the actual experiments and understand all the scientific messiness, but really, I don’t know how you could ever get around this paradox with scientific deductions.. i’m yet to be convinced.
This would all be a lot easier if we said “The anomalies associated with the double-slit experiment are the result of some unknown variable that we alter when placing a sensor on the slits. The photons do not collide with themselves as waves, they are simply influenced by wholly material factors that we currently have no capacity to observe or measure.”
But I guess that would be a bit of a cop out.