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The many worlds interpretation (MWI) involves working out the implications of quantum mechanics and taking what it says seriously as a description of reality. One of the implications of quantum mechan …

The point of the memory robots was to provide a quantum mechanical model of observers rather than treating observations as an exception to quantum mechanical equations of motion. A quote from Section …

"Shut up and calculate" (SUAC) is a philosophical doctrine and so can't be refuted by any experiment. SUAC holds that it doesn't matter what's happening in reality as long as you can predict experimen …

According to the many worlds interpretation (MWI) each system exists in multiple versions. Those versions can interfere with one another under some circumstances. But if information is copied out of t …

The controversy over the interpretation of quantum is, confusingly, not about interpreting the equations of quantum theory. An interpretation would describe how those equations describe reality. The C …

A measurement is an interaction that results in a record that can be copied and examined with arbitrarily high accuracy. In quantum physics, the information that can be copied in this way in a particu …

But one thing that's always bothered me about that kind of statement: does Many Worlds really imply Every World? You can have an infinite set of numbers that doesn't include every number. Qua …

I don't really know what the questioner means by whether the MWI makes a calculation easier or more elegant. I can think of calculations that cannot be done in any other interpretation because they de …

The way the MWI treats probability is roughly as follows. You take the non-probabilistic part of quantum theory. You then assign decision theoretic payoff to each possible measurement outcome and assi …

In the MWI different versions of a system can interfere with one another and when interference effects are strong it doesn't make much sense to say they're in different universes because they affect o …

The MWI is a description of what reality looks like if we take quantum theory seriously as a description of how the world works. In quantum theory, the results of experiments are affected by what happ …

The answer given above explains that there are some experiments that might be used to distinguish between different interpretations. However, it is a myth that experiments are the only way in which on …

In classical physics the equations of motion for the $x$ position of a particle are written in terms of a function $x(t)$ such that if you measure $x$ at time $t$, you get the answer $x(t)$. In quantu …

The probability that a radioactive nucleus remains undecayed after a time $t$ is $e^{-t/\tau}$ where $\tau$ is some time constant. These probabilities, like other quantum probabilities vary continuous …

This question takes for granted an idea that is common among physicists, but is also false. The idea is that there are multiple interpretations of quantum mechanics that all make the same predictions. …