A. Neumaier's latest activity

The (strongly modified) submitted version is here. A poster for a conference next week in Vienna summarizes everything on one page.

So it is extra structure assumed, beyond the textbook requirenments for a quantum system. Not a good sign for an interpretation of...

The statement is basis-independent. For example, any ##\rho=\pi\psi^*## with normalized ##\psi## is a rank 1 projector. Given a Hilbert...

One can prove that every finite- rank density matrix can be written as a convex combination of projectors, and that every density matrix...

Of course they are well-defined. In a long distance Bell experiment, Alice sees the effects of one of the entangled photons, not even...