Extended Wigner's friend problem and the internal consistency of
standard quantum mechanics
- URL: http://arxiv.org/abs/2102.08709v3
- Date: Tue, 1 Jun 2021 15:03:57 GMT
- Title: Extended Wigner's friend problem and the internal consistency of
standard quantum mechanics
- Authors: D.Sokolovski and A.Matzkin
- Abstract summary: We investigate the Wigner's friend problem by relying on the basic rules of quantum mechanics as exposed by Feynman.
Although recent discussions have suggested that the extended Wigner's friend problem cannot consistently be described by quantum theory, we show here that a straightforward application of these standard rules results in a non-ambiguous and consistent account of the measurement outcomes for all agents involved.
- Score: 0.0
- License: http://creativecommons.org/licenses/by/4.0/
- Abstract: The extended Wigner's friend problem deals with two Observers each measuring
a sealed laboratory in which a friend is making a quantum measurement. We
investigate this problem by relying on the basic rules of quantum mechanics as
exposed by Feynman in the well-known "Feynman Lectures on Physics". Although
recent discussions have suggested that the extended Wigner's friend problem
cannot consistently be described by quantum theory, we show here that a
straightforward application of these standard rules results in a non-ambiguous
and consistent account of the measurement outcomes for all agents involved.
Related papers
- Thinking twice inside the box: is Wigner's friend really quantum? [0.0]
We argue that the gist of the Wigner's friend paradox can be reproduced without assuming quantum physics.
We show that several recently proposed extended Wigner's friend scenarios can be reproduced by classical thought experiments.
We argue that this difficulty is at the core of other puzzles in the foundations of physics and philosophy.
arXiv Detail & Related papers (2024-02-13T19:00:13Z) - Two Results in the Quantum Theory of Measurements [44.99833362998488]
The first one clarifies and amends von Neumann's Measurement Postulate used in the Copenhagen interpretation of quantum mechanics.
The second one clarifies the relationship between events'' and measurements'' and the meaning of measurements in the $ETH$-Approach to quantum mechanics.
arXiv Detail & Related papers (2023-12-01T14:05:04Z) - Logic meets Wigner's Friend (and their Friends) [49.1574468325115]
We take a fresh look at Wigner's Friend thought-experiment and some of its more recent variants and extensions.
We discuss various solutions proposed in the literature, focusing on a few questions.
arXiv Detail & Related papers (2023-07-04T13:31:56Z) - Quantum Discord Witness with Uncharacterized Devices [18.751513188036334]
We propose a new approach using uncharacterized measurements to witness quantum discord of an unknown bipartite state within arbitrary dimension system.
The feature of high robustness against device imperfections, such as loss-tolerance and error-tolerance, shows our method is experimentally feasible.
arXiv Detail & Related papers (2023-03-20T14:51:53Z) - Events in quantum mechanics are maximally non-absolute [0.9176056742068814]
We prove that quantum correlations can be maximally non-absolute according to both quantifiers.
We show that chained Bell inequalities (and relaxations thereof) are also valid constraints for Wigner's experiment.
arXiv Detail & Related papers (2021-12-19T21:15:16Z) - Experimental verification of fluctuation relations with a quantum
computer [68.8204255655161]
We use a quantum processor to experimentally validate a number of theoretical results in non-equilibrium quantum thermodynamics.
Our experiments constitute the experimental basis for the understanding of the non-equilibrium energetics of quantum computation.
arXiv Detail & Related papers (2021-06-08T14:16:12Z) - Observers of quantum systems cannot agree to disagree [55.41644538483948]
We ask whether agreement between observers can serve as a physical principle that must hold for any theory of the world.
We construct examples of (postquantum) no-signaling boxes where observers can agree to disagree.
arXiv Detail & Related papers (2021-02-17T19:00:04Z) - Experimental Validation of Fully Quantum Fluctuation Theorems Using
Dynamic Bayesian Networks [48.7576911714538]
Fluctuation theorems are fundamental extensions of the second law of thermodynamics for small systems.
We experimentally verify detailed and integral fully quantum fluctuation theorems for heat exchange using two quantum-correlated thermal spins-1/2 in a nuclear magnetic resonance setup.
arXiv Detail & Related papers (2020-12-11T12:55:17Z) - Quantum measurements with, and yet without an Observer [0.0]
It is argued that Feynman's rules for evaluating probabilities, combined with von Neumann's principle of psycho-physical parallelism, help avoid inconsistencies.
arXiv Detail & Related papers (2020-09-26T11:10:52Z) - Quantum erasing the memory of Wigner's friend [0.0]
Wigner's friend paradox concerns one of the most puzzling problems of quantum mechanics.
At the core of the paradox lies the description of an observer and the object it measures as a closed system obeying the Schr"odinger equation.
We argue that the three apparently incompatible properties used to question the consistency of quantum mechanics correspond to two logically distinct contexts.
arXiv Detail & Related papers (2020-09-21T14:24:58Z) - Wigner's friend, Feynman's paths and material records [0.0]
Wigner brought this question to the fore in a celebrated scenario in which a super-Observer observes a Friend making a measurement.
We will argue that quantum theory can consistently leave observers outside its narrative.
arXiv Detail & Related papers (2020-09-02T14:42:53Z)
This list is automatically generated from the titles and abstracts of the papers in this site.
This site does not guarantee the quality of this site (including all information) and is not responsible for any consequences.