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This tag is for questions relating to what, if anything, the quantum mechanical formalism and experimental results say about the way the world works.

1 vote

Quantum immortality

There are several reasons why quantum suicide is typically raised. The first is that the other interpretations are typically extremely unclear about how the world works and what exists in reality, see …
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1 vote

Can quantum entanglement be explained by holism?

Entanglement and Bell correlations are a result of quantum theory. So if you want to work out if there is an explanation of Bell correlations you should work that out using quantum theory. This gets u …
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1 vote

Why do realists not define measurement?

It is difficult to answer your question when you have not given the exact context. The term "realism" is sometimes used in the context of quantum mechanics to mean that measurable quantities always ha …
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1 vote

Assuming many-worlds interpretation of QM, do ethical obligations cross worlds' boundaries?

The MWI does not affect whether it is right or wrong for you to commit suicide in a given case. In case (1) your moral objection to the scheme should be that it will limit the set of people with whom …
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2 votes
Accepted

Is positing a multiverse to replace randomness a desperate attempt to hide agency?

Agency is about the fact that you can make decisions by considering different possible options and selecting among them. A random event doesn't involve any agency. The many worlds interpretation (MWI …
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4 votes

Is the many worlds interpretation of quantum mechanics philosophically untenable?

The numbered objections given on your question don't take account of the actual literature on quantum mechanics without collapse. In the MWI systems exist in different versions that can interact with …
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-1 votes

Does this follow from Everett's Many-Worlds?

I'm going to describe what the MWI actually claims before answering your question. In some situations if you take a single particle and put it in a situation where it could go down multiple paths and …
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1 vote
Accepted

Which interpretations of quantum mechanics require a fundamental "arrow of time"?

The spontaneous collapse theory is an alternative to quantum theory with different equations of motion: https://arxiv.org/abs/2310.14969 This theory has an arrow of time built into its postulates beca …
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1 vote

Does quantization challenge infinity?

In quantum theory, the evolution of a physical system is described by Hermitian operators called observables. The possible results of measurements of those observables are their eigenvalues. Quantum t …
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0 votes

Does running a program about quantum mechanics on a quantum computer count as an experiment ...

When it comes to the simulation vs. experiment debate, some proponents of simulations argue they have equal epistemic value because computer simulations are physical processes happening inside a co …
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0 votes

What is the most commonsense interpretation of QM for the layman?

Common sense is just what a particular person happen to think is obvious or sensible or something like that. Some common sense may be right, some may be wrong. Different people think different ideas a …
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1 vote

Is a quantum theory that is indigenously quantum mechanical a real possibility?

The general approach to Quantum Mechanics is that one first takes a classical system and then quantise to obtain a quantum mechanical system. Quantisation is not an algorithm. It consists of appl …
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2 votes

Has quantum mechanics destroyed the fundaments of logical reasoning?

In quantum mechanics it is thought to be possible that something could be at two places at the same time. But if that is really the case then perhaps law of non-contradiction is no longer valid. …
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2 votes

What would the wavefunction represent in an observer-less universe?

The wavefunction represents what is happening in reality. It is not a statistical summary since the square amplitudes only act according to the calculus of probabilities in some circumstances: https:/ …
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1 vote

Many-worlds Interpretation defeats the Doomsday argument?

The doomsday argument as explained in your post is defeated by using assumptions that make no sense. For example, if you have complete ignorance of something you can't make probability estimates about …
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