A Feasible Experiment Concerning the Schrödinger's Cat and Wigner's Friend Paradoxes

2001 ◽  
Vol 14 (2) ◽  
pp. 164-170 ◽  
Author(s):  
Fred H. Thaheld
Keyword(s):  
Wigner’S Friend ◽  
Feasible Experiment

Wigner's friend paradox: does objective reality not exist?

2020 ◽  
Vol 190 (12) ◽  
pp. 1335-1342
Author(s):  
Aleksandr V. Belinsky
Keyword(s):  
Objective Reality ◽  
Wigner’S Friend

scholarly journals Experimental test of local observer independence

2019 ◽  
Vol 5 (9) ◽  
pp. eaaw9832 ◽  
Author(s):  
Massimiliano Proietti ◽  
Alexander Pickston ◽  
Francesco Graffitti ◽  
Peter Barrow ◽  
Dmytro Kundys ◽  
...  
Keyword(s):  
Quantum Mechanics ◽  
Scientific Method ◽  
Free Choice ◽  
Empirical Investigation ◽  
State Of The Art ◽  
Thought Experiment ◽  
Type Inequality ◽  
Repeated Measurements ◽  
Wigner’S Friend ◽  
Local Observer

The scientific method relies on facts, established through repeated measurements and agreed upon universally, independently of who observed them. In quantum mechanics the objectivity of observations is not so clear, most markedly exposed in Wigner’s eponymous thought experiment where two observers can experience seemingly different realities. The question whether the observers’ narratives can be reconciled has only recently been made accessible to empirical investigation, through recent no-go theorems that construct an extended Wigner’s friend scenario with four observers. In a state-of-the-art six-photon experiment, we realize this extended Wigner’s friend scenario, experimentally violating the associated Bell-type inequality by five standard deviations. If one holds fast to the assumptions of locality and free choice, this result implies that quantum theory should be interpreted in an observer-dependent way.

scholarly journals Emergence of Objective Reality in an Irreversible Friend thought Experiment

2021 ◽  
Author(s):  
Robert Shuler
Keyword(s):  
Thought Experiment ◽  
Hidden Variables ◽  
Ensemble Member ◽  
Irreversible Processes ◽  
Many Worlds ◽  
Objective Reality ◽  
Objective World ◽  
The Public ◽  
Wigner’S Friend ◽  
The Many

Background: Recently some photon models of a Wigner's friend experiment have led investigators to suggest objective reality does not exist, and to publish non-academic articles with such claims. The public is not equipped to evaluate the severe limitations of these experiments. The separation of Wigner from the experiment and use of only reversible coherent processes for the friend allow operations that are not possible in ordinary reality according to the latest quantum research. Methods: We suggest directly testing the implied claim that objective reality, including incoherent objects with irreversible non-destructive memory, can be held in superposition. We suspect it will fail, but provide for a graduated approach that may discover something about the conditions for superposition collapse. To this end we design a thought experiment to model the objective world, investigating under what conditions experimenters in the same world (ensemble member) will be able to record a result and find it does not appear to change. An observer has a viewing apparatus and a memory apparatus. A second uncorrelated viewer of the same recorded result is employed to obtain objectivity. By hypothesis the uncorrelated second viewer obtains the same view of the measurement record as the first observer. There are not two measurements. This is not an investigation of hidden variables. Results: To model the objective world, incoherent and irreversible processes must be included. To test for superposition, coherence has to be established. These seem to present a contradiction. Conclusions: The thought experiment has suggested new places to look other than size for the origin of objective reality from the quantum world, casts doubt on the Many-Worlds interpretation, and provides a method of testing it.

scholarly journals Wigner's friend, Feynman's paths and material records

2020 ◽  
Vol 131 (4) ◽  
pp. 40001 ◽  
Author(s):  
A. Matzkin ◽  
D. Sokolovski
Keyword(s):  
Wigner’S Friend

AutoCell Systematic Evolution of Ligands by Exponential Enrichment: The Software Designed and Developed for the Automated Screening System of Nucleic Acid Aptamers

2021 ◽  
Vol 21 (10) ◽  
pp. 5363-5369
Author(s):  
Yuhong Pei ◽  
Chao Wang ◽  
Zhu Chen ◽  
Song Li ◽  
Hui Chen ◽  
...  
Keyword(s):  
Time Process ◽  
Serial Port ◽  
Control Center ◽  
Serial Port Communication ◽  
Efficient Data ◽  
Systematic Evolution ◽  
Automated Screening ◽  
Data Acquisition And Processing ◽  
Exponential Enrichment ◽  
Feasible Experiment

Aptamers are a new kind of nano-probes for bioassays and drug delivery, etc. In this paper, software has been developed as an automatic control center for the automated aptamer selecting system which realized the high integration of aptamer selection, data acquisition and processing. This software, applied in windows system, is developed by C# with the Microsoft Visual Studio 2015 integrated developing environment and the database used in this software is implemented using open source relational database MYSQL. According to the requirement analysis, this software realized various important necessary functions including feasible experiment design, auto-control of the hardware, real time process monitoring and efficient data management which perfectly satisfies the users’ demands. During the actual experiment operation, this software worked smoothly and assumed stable serial port communication between it and the hardware, meanwhile, the interaction between the software and MYSQL remained good stability. As a consequence, it is practical and reasonable to apply this software to the automated aptamer selecting system for research.

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