The QM state space has a preferred inner product, which we can use to e.g. dualize a (0,2) tensor (i.e. a thing that eats takes two vectors and gives a number) into a (1,1) tensor (i.e. an operator). So we can think of it either way.
Oh I meant a (2, 0) tensor.
Same difference
The QM state space has a preferred inner product, which we can use to e.g. dualize a (0,2) tensor (i.e. a thing that eats takes two vectors and gives a number) into a (1,1) tensor (i.e. an operator). So we can think of it either way.
Oh I meant a (2, 0) tensor.
Same difference