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1 vote
2 answers
307 views

How does the many-worlds interpretation look like in bra ket notation?

If I understand correctly the many worlds interpretation says the universe is continously splitting into multiple branches and quantum measurements occur when decoherence causes a quantum state to ...
AccidentalTaylorExpansion's user avatar
1 vote
1 answer
88 views

Is it possible to classify "branches" in the MWI of QM? [closed]

In Everett's Many Worlds Interpretation of QM, what would be classified as a "world" or a "branch"? Would the "reality" of what I'm consciously experiencing be distinguishable from a separate "...
QuantumExplorer's user avatar
1 vote
2 answers
146 views

Are wave functions built of other wave functions?

I have heard the term wave function used in a number of contexts describing both quantum objects (electrons, etc) and more macroscopic objects (atoms, birds, cats, etc). Is it correct to say a lithium ...
ledigiacomo's user avatar
1 vote
2 answers
151 views

Does something prevent superposition at our scale?

I often encounter the argument that quantum mechanics reduces to classical mechanics at sufficiently big scales, as soon as h becomes sufficiently small respect to the actions involved. I clearly ...
J.Ask's user avatar
  • 163
23 votes
6 answers
6k views

How do we know that entanglement allows measurement to instantly change the other particle's state? [duplicate]

I have never found experimental evidence that measuring one entangled particle causes the state of the other entangled particle to change, rather than just being revealed. Using the spin up spin down ...
Qandry's user avatar
  • 247