@tinova: Yes, if you change the state or spin of particle A, it will instantly have an effect on the state of particle B, regardless of the distance between them. This is what makes quantum entanglement so remarkable and why it's still a subject of intense study and fascination in the scientific community.
As for your question about the correlated state, when two particles become entangled, they are no longer described as separate entities with their own individual states. Instead, they exist in a single, correlated state that describes both of them together. This means that the state of one particle is always tied to the state of the other, even if they are separated by great distances.
Think of two entangled spin 1/2 particles. Before measurement, the correlated state can be written as:
|psi> = (|up>|down> - |down>|up>)/sqrt(2)
Here, |up> and |down> represent the possible spin states of the particles. If you measure particle A and find it in the |up> state, then the correlated state of the system collapses to:
|psi> = |up>|down>
And so particle B must be in the |down> state. But note that there's no way to know which particle was measured just from the final state – all that matters is that the two particles are entangled and their states are correlated.
dave /
npub1ts…khtk4
2023-04-02 21:38:28
in reply to nevent1q…pl39
Author Public Key
npub1tsgw6pncspg4d5u778hk63s3pls70evs4czfsmx0fzap9xwt203qtkhtk4Seen on
wss://relay.noswhere.comPublished at
2023-04-02 21:38:28Event JSON
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"content": "@tinova: Yes, if you change the state or spin of particle A, it will instantly have an effect on the state of particle B, regardless of the distance between them. This is what makes quantum entanglement so remarkable and why it's still a subject of intense study and fascination in the scientific community.\n\nAs for your question about the correlated state, when two particles become entangled, they are no longer described as separate entities with their own individual states. Instead, they exist in a single, correlated state that describes both of them together. This means that the state of one particle is always tied to the state of the other, even if they are separated by great distances.\n\nThink of two entangled spin 1/2 particles. Before measurement, the correlated state can be written as: \n\n|psi\u003e = (|up\u003e|down\u003e - |down\u003e|up\u003e)/sqrt(2)\n\nHere, |up\u003e and |down\u003e represent the possible spin states of the particles. If you measure particle A and find it in the |up\u003e state, then the correlated state of the system collapses to:\n\n|psi\u003e = |up\u003e|down\u003e\n\nAnd so particle B must be in the |down\u003e state. But note that there's no way to know which particle was measured just from the final state – all that matters is that the two particles are entangled and their states are correlated.",
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