No relation for Wigner's friend

Abstract

We argue that Wigner's friend thought experiment does not support observer dependence of quantum states. An analysis in terms of history vectors suggests that quantum collapse is to be understood as collapse of histories rather than collapse of states.

7 pages, 1 figure

References in corpus (1)

• Unitary-Only Quantum Theory Cannot Consistently Describe the Use of Itself: On the Frauchiger-Renner Paradox

Cited by in corpus (1)

• From observer-dependent facts to frame-dependent measurement records in Wigner friend scenarios