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Rodia
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In my textbook, quantum states are infinite dimensional vectors. But I was watching a lecture on QM and the professor referred to ##|v> <u|## as itself being a quantum state. Also I saw online people saying the same thing.
Are tensor products just things that tell you whether or not the two particles that created it are entangled? So ##<p|q>## is not technically a state, but rather it is just a matrix which tells you that particle 1 is in state p and particle 2 is in state q? But then, if you have a situation where the two particles are entangled, then how do you ever measure them?
By the way if this is the wrong forum to post in, sorry, it's hard to tell. 'Irreducible tensor products' don't appear in my text until a lot later and I don't know some of the notation. I noticed that ##|v><u| w> = |v>a## for a scalar ##'a'##. Whereas ##<w| v><u|= b<u|##. So that's how you can tell if there's entanglement, but then what?
If I just don't have enough knowledge for this question let me know.
Are tensor products just things that tell you whether or not the two particles that created it are entangled? So ##<p|q>## is not technically a state, but rather it is just a matrix which tells you that particle 1 is in state p and particle 2 is in state q? But then, if you have a situation where the two particles are entangled, then how do you ever measure them?
By the way if this is the wrong forum to post in, sorry, it's hard to tell. 'Irreducible tensor products' don't appear in my text until a lot later and I don't know some of the notation. I noticed that ##|v><u| w> = |v>a## for a scalar ##'a'##. Whereas ##<w| v><u|= b<u|##. So that's how you can tell if there's entanglement, but then what?
If I just don't have enough knowledge for this question let me know.
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