I have a question regarding the ontology of the many-worlds interpretation which by my assumption shows some deficiencies in this way of thinking.(adsbygoogle = window.adsbygoogle || []).push({});

When many worlders describe branching and effects giving rise to multiple worlds they typically invoke Schrodinger cat-type experiments where from a micro state we get a meaningful superposition on a macro level and two distinct worlds.

But the problem with this is when they invoke the infamous "the splitting occurs all the time". Suppose a person tosses a die. This line of thinking implies that there would be six worlds where each outcome is realized.

But as far as we know, tossing a die is a classical process which is fundamentally distinct from a case of micro-macro entanglement. So when it is said - all possible outcomes occur - do they really, and how?

Note that this example doesn't invoke math and I would like to be based strictly on the example of the coin toss that I mentioned - since that example doesn't seem to imply many worlds.

The second part of problem is the possibility of worlds where entropy spontaneously decreases. Suppose I have a broken glass. In classical mechanics it is possible for it to reform but you would have to wait a long, long time so the possibility is practically negligible. If the wavefunction is all there is it should also obey the second law of thermodynamics and you would have to wait an extremely long time before you get glasses reforming, no matter what world in the set of the worlds in the theory is in question.

But it seemse that due to quantum uncertainty there should be worlds where glasses spontaneously reform all the time, those worlds would be a complete violation of the 2nd law of thermodynamics.

Is this considered a part of the theory or there are no such worlds and all of the worlds must obey the 2nd law of thermodynamics because it would violate Schrodinger's equation if they didn't?

Thanks in advance

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# I Many Worlds vs Classical Mechanics

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