- #36
Ken G
Gold Member
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That's not relevant to anything I said-- I was talking about what you can know, not what you can pretend you think you know using Bohm. That is what Bohmian mechanics is, after all-- the pretense of knowing.zenith8 said:You're deluding yourself mate. Remember that unless you deliberately graft on measurement apparatus then de Broglie-Bohm is a theory of what actually happens in a single system, irrespective of who happens to observe it.
Basically what I hear there is blah, blah, pretense of knowing, blah blah. (Not trying to offend, I'm just being humorous-- yet serious about the physics.) You can't show any of it. Symmetry alone tells you the nice figure is not going to cross the center, I don't care how you make the figure, and it certainly doesn't tell you anything about what the photons "can't do."Thus, as the trajectories (the streamlines of the probability current, if you must) don't cross, there is a plane of symmetry along the centreline between the two slits (see the various trajectory diagrams that have been shown). The trajectories cannot cross this plane. If we assume this plane divides the detector into left and right halves, then any particle hitting the left half of the screen must have gone through the left slit. Any particle hitting the right half of the screen must have gone through the right slit. The objectively-existing pilot wave, represented mathematically by the Schroedinger wave function, passes through both slits.
Actually, my statement is still correct, because I was talking about what you could demonstrate you know, and you are talking about what you can pretend you know. I have no problem with people who like Bohm because it fits their prejudices about how a universe ought to work, my issue is when they claim they have shown the universe actually works that way. Until you can show the Bohm trajectories agree with this experiment, and the classical trajectories I've talked about don't, you have not actually shown any of your claims.Thus, assuming that the deBB assumptions about what exists (particle and wave) are correct, then your statement is simply wrong, so I don't know why you're adopting such an attitude.