Recent content by Guilherme Vieira

Thanks, that is enlightening

Thank you. But, the definition of the density operator is not ρ=|ψ><ψ| or ρ=∑|ψi><ψi| ? Then it'is like the projector and the density operator are the same thing, or almost the same thing.

Hello, I'm trying to understand how to calculate de probability of finding a system in a specific eigenstate using the density operator. In the book of Balian, Haar, Gregg I've found a good definition of it being the expectation value of the projector Pr in the orientation of the eingenstate...