• Corpus ID: 251223593

The Frauchiger-Renner Gedanken Experiment: an Interesting Laboratory for Exploring Some Topics in Quantum Mechanics

  title={The Frauchiger-Renner Gedanken Experiment: an Interesting Laboratory for Exploring Some Topics in Quantum Mechanics},
  author={Stuart Samuel},
In a publication (Nature Comm. 3711, 9 (2018)), Daniela Frauchiger and Renato Renner used a Wigner/friend gedanken experiment to argue that quantum mechanics cannot describe complex systems involving measuring agents. They were able to produce a contradictory statement starting with four statements about measurements performed on an entangled spin system. These statements needed to be combined using the tran- sitive property of logic: If A implies B and B implies C , then A implies C . However… 

Figures from this paper



Wigner’s Friend Scenarios and the Internal Consistency of Standard Quantum Mechanics

It is shown here that the basic rules of quantum mechanics as outlined by Feynman in the well-known “Feynman Lectures on Physics” constrain the a priori assumptions which can be made in generalised Wigner's friend scenarios, because the existence of the probabilities of interest ultimately depends on the availability of physical evidence of the system’s past.

Relational Analysis of the Frauchiger–Renner Paradox and Interaction-Free Detection of Records from the Past

We present an analysis of the Frauchiger–Renner Gedankenexperiment from the point of view of the relational interpretation of quantum mechanics. Our analysis shows that the paradox obtained by

The hidden assumptions of Frauchiger and Renner.

This note is a critical examination of the argument of Frauchiger and Renner (Nature Communications 9:3711 (2018)), in which they claim to show that three reasonable assumptions about the use of

Remarks on the Mind-Body Question

F. Dyson, in a very thoughtful article,1 points to the everbroadening scope of scientific inquiry. Whether or not the relation of mind to body will enter the realm of scientific inquiry in the near

How Quantum Mechanics can consistently describe the use of itself

It is shown that any single-world interpretation of quantum mechanics leads to inconsistent predictions if it is applicable on all scales if one considers a complete description of the physical situation, in particular to Bohmian mechanics.

Quantum theory cannot consistently describe the use of itself

A variant of Wigner’s friend Gedankenexperiment where each of the current interpretations of QM fails in giving a consistent description, indicating that quantum theory cannot be extrapolated to complex systems, at least not in a straightforward manner.

Single-World Theory of the Extended Wigner’s Friend Experiment

Frauchiger and Renner have recently claimed to prove that “Single-world interpretations of quantum theory cannot be self-consistent”. This is contradicted by a construction due to Bell, inspired by

Consistent Descriptions of Quantum Measurement, Found

  • Phys. 49,
  • 2019

https://www.scientificamerican.com/article/this-twist-on-schroedingers-cat-paradox- has-major-implications-for-quantum-theory/ (Accessed on 6/17/22)

  • Twist on Schrödinger’s Cat Paradox Has Major Implications for Quantum Theory, Scientific American (August
  • 2020

Wigner-friend scenarios with noninvasive weak measurements

Wigner Friend scenarios -- in which an external agent describes quantum mechanically a laboratory in which a Friend is making a measurement -- give rise to possible inconsistencies due to the