Physics and Metaphysics of Wigner's Friends: Even performed pre-measurements have no results · HackerPapers discussions

Physics and Metaphysics of Wigner's Friends: Even performed pre-measurements have no results — mentioned by lmm

Sat, 12 Sep 2020 11:40:48 GMT

> Of course the state can be written in the form |xx> + |yy>. I never denied that. The point is that it can be written in other forms. So it's equally correct to say we'd "experience" |zz> + |ww> + |zw> + |wz> as to say we'd experience |xx> + |yy> so there's no reason to say we'd "obviously" experience only the latter. Your argument is just "that expansion is always available", but since other expansions are also always available I don't see what the force of this argument is. If there's a simple description of the wavefunction that's valid then there should be a correspondingly simple…

Paper and discussion history. A mention is not an endorsement.

Physics and Metaphysics of Wigner's Friends: Even performed pre-measurements have no results — mentioned by Orlanthai

Wed, 09 Sep 2020 14:05:24 GMT

> The state's evolution will be completely equivalent to (a linear superposition of) the evolution of |x>|x> and |y>|y>. That's a physically observable fact that's independent of your choice of basis (it's less obvious in the |z>/|w> basis, but it's still true). Of course the state can be written in the form |xx> + |yy>. I never denied that. The point is that it can be written in other forms. So it's equally correct to say we'd "experience" |zz> + |ww> + |zw> + |wz> as to say we'd experience |xx> + |yy> so there's no reason to say we'd "obviously" experience only the latter. Your argument is…

Paper and discussion history. A mention is not an endorsement.