Hmmm… this post has received at least three downvotes at this point. I’m pretty confident that everything I’ve said here about the MWI is correct, but if someone thinks it isn’t, I’m very interested to hear why. So if the downvoting is attributable to perceived factual inaccuracy, could you let me know what you think the inaccuracy is? Thanks.
So branching is the consequence of a particular type of physical process: the “measurement” of a microscopic superposition by its macroscopic environment. Not all physical processes are of this type, and its not at all obvious to me that the sorts of processes usually involved in our deaths are of this sort.
I think that essentially all processes involving macroscopic objects are of this type. My understanding is that the wave function of a macroscopic system at nonzero temperature is constantly fissioning into vastly huge numbers of decoherent sub-regions, i.e., “worlds.” These worlds start out similar to each other, but we should expect differences to amplify over time. And, of course, each new world immediately begins fissioning into vast numbers of “sub-worlds.”
So, while in one world you might get run over by a bus, there is e.g. another world that separated from that one a year ago in which the bus is late and you survive. Plus huge numbers of other possibilities.
In this vast profusion of different worlds, for any given death there’s essentially always another branch in which that death was averted.
Most of his premises are approximately correct but applied incorrectly to reach an incorrect conclusion (that is the first sentence). It could be restored by injecting caveats like “for all practical purposes” and “virtually” here but the thing is the whole “Immortality” notion is already ridiculously impractical to begin with. Quantum tunneling through the bus and leaving your arm behind is only a few gagillion orders of magnitude more unlikely than winning Quantum Roulette ten times a day every day for 1,000 years. It is stupid to consider those improbable outcomes as privileged but not wrong.
Hmmm… this post has received at least three downvotes at this point. I’m pretty confident that everything I’ve said here about the MWI is correct, but if someone thinks it isn’t, I’m very interested to hear why. So if the downvoting is attributable to perceived factual inaccuracy, could you let me know what you think the inaccuracy is? Thanks.
I have an objection to this:
I think that essentially all processes involving macroscopic objects are of this type. My understanding is that the wave function of a macroscopic system at nonzero temperature is constantly fissioning into vastly huge numbers of decoherent sub-regions, i.e., “worlds.” These worlds start out similar to each other, but we should expect differences to amplify over time. And, of course, each new world immediately begins fissioning into vast numbers of “sub-worlds.”
So, while in one world you might get run over by a bus, there is e.g. another world that separated from that one a year ago in which the bus is late and you survive. Plus huge numbers of other possibilities.
In this vast profusion of different worlds, for any given death there’s essentially always another branch in which that death was averted.
And then there’s the branch with extremely small amplitude that separated 30 seconds ago where the bus explodes form proton decay.
I don’t think you have any factual inaccuracies.
Most of his premises are approximately correct but applied incorrectly to reach an incorrect conclusion (that is the first sentence). It could be restored by injecting caveats like “for all practical purposes” and “virtually” here but the thing is the whole “Immortality” notion is already ridiculously impractical to begin with. Quantum tunneling through the bus and leaving your arm behind is only a few gagillion orders of magnitude more unlikely than winning Quantum Roulette ten times a day every day for 1,000 years. It is stupid to consider those improbable outcomes as privileged but not wrong.