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I have just understood what quantum superposition truly means in terms of the bra-ket vectors and the vector space. From my understanding, two entangled particles affect the probability of each particle's state. For example, if electron A and electron B were entangled and electron B would always have the reverse spin of electron A, then measuring one could inform us of the state of the other.

I wanted to understand that some videos that I watched claimed that this could allow us to pass information faster than the speed of light. Does that mean physically changing the spin of electron A would change the spin of electron B?

Vinay Bharadhwaj
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Entanglement is not only a quantum mechanical effect.

If you know two persons who are "entangled" by being twins, say John and David, and hear that one of them got a job in New York and the other has stayed in your town, if you meet David on the street, you immediately know that John is in New York.

The quantum entanglement comes from the common wavefunction describing the entangled particles. What is a wavefunction? the solution of specific potential and boundary values. To be able to " physically change the spin of electron A " you have to use an interaction. This interaction will be described by a new wavefunction, where the B particle is not included because it is far away, so the spin of B will be what it was when it left the group, it will not be affected.

anna v
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