David Quintero on Nostr: Something cool I learnt in the video of the chapter 8, Entanglement, Q&A, by Sean M. ...

Something cool I learnt in the video of the chapter 8, Entanglement, Q&A, by Sean M. Carroll: not every interaction creates an entanglement. You need each part of the superposition to act differently in the interaction.

For instance, an electron in a superposition of spin up and down states falling in a gravitational field doesn't get entangled with the environment (the field) because both spins act equally under the gravitational field; whereas if instead of a gravitational field you have a magnetic field then spin down and up interact differently, so there you have entanglement with the field.

I guess I should have known this, but in my defense I should say that my QM classes were solving the Schrödinger equation under different circumstances and diagonalising hamiltonians, and almost nothing regarding more conceptual ideas...🤷‍♂️