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3 votes
2 answers
149 views

Is there an unentangled electron pair in the universe?

How can we be sure that there are two electrons in the universe whose spins are uncorrelated (their joint state is the tensor product of their individual projections) but each of them has nonzero ...
Noobrador's user avatar
-2 votes
1 answer
404 views

Is quantum entanglement contradictory with Schrödinger's cat?

As I understand, an electron spin is in a superposition state until the spin is observed. Due to the observation, it will either be spin up or spin down. Due to quantum entanglement, if one electron ...
toaster_fan's user avatar