
Shan Gao started the topic Closing the superdeterminism loophole in Bell’s theorem in the forum 2019 International Workshop: Beyond Bell's theorem 3 weeks, 1 day ago
http://philsciarchive.pitt.edu/16203/
It is well known that there is a freedomofchoice loophole or superdeterminism loophole in Bell’s theorem. Since no experiment can completely rule out the possibility of superdeterminism, it seems that a local hidden variable theory consistent with relativity can never be excluded. In this paper, we…[Read more]

Shan Gao replied to the topic A New Ontological Interpretation of the Wave Function in the forum Meaning of the wave function 1 year, 3 months ago
Further comments are welcome!

Shan Gao replied to the topic What are the most pressing problems? and how to solve them? in the forum Panel Discussion 1 year, 3 months ago
I still think the psychophysical connection is one of these problems. See my recent paper:
https://link.springer.com/article/10.1007%2Fs112290171476y

Shan Gao replied to the topic TI: Derivation of the Born Rule for Radiative Processes in the forum Retrocausal theories 1 year, 3 months ago
I will read the paper later.

Shan Gao replied to the topic Three arguments for the reality of wavefunction collapse in the forum 2017 International Workshop: Collapse of the Wave Function 2 years, 2 months ago
Dear Bob,
Thanks for your comments! I am sorry for not discussing your ideas in detail in my book. The reason is that I have not studied your CH solution very deeply, and I cannot give my own opinions on it. I will try to study your solution in the near future.
Best,
Shan 
Shan Gao started the topic Three arguments for the reality of wavefunction collapse in the forum 2017 International Workshop: Collapse of the Wave Function 2 years, 2 months ago
Quantum mechanics is an extremely successful physical theory due to its accurate empirical predictions. The core of the theory is the Schrodinger equation and the Born rule. The Schrodinger equation is linear and it governs the time evolution of the wave function assigned to a physical system. The Born rule says that the result of a measurement on…[Read more]


Shan Gao replied to the topic Does the psiepistemic view really solve the measurement problem? in the forum 2016 International Workshop on Quantum Observers 3 years, 7 months ago
Hi Jiri,
Thanks for your comments. I think you misunderstood the main idea of my paper. It does not aim to argue the impossibility of the psiepistemic view based on the KochenSpecker theorem. It only argues that the psiepistemic view does not provide a straightforward resolution or a dissolution of the measurement problem, as I clearly…[Read more]

Shan Gao replied to the topic Does the psiepistemic view really solve the measurement problem? in the forum 2016 International Workshop on Quantum Observers 3 years, 7 months ago
Hi Ken,
Thanks again for your very detailed reply! I learned a lot about the retrocausal quantum models from them. I feel that such models seem more complex than Bohm’s theory. Maybe the reason is that there are no wave functions in them?
Best,
Shan 
Shan Gao replied to the topic Does the psiepistemic view really solve the measurement problem? in the forum 2016 International Workshop on Quantum Observers 3 years, 7 months ago
Hi Matt,
Thanks again for your further comments, most of which I agree. There is only one minor point I disagree. I still think the ontological models framework is more specific than Bell’s framework due to its second assumption. Even in the proof of the CHSH version of Bell’s theorem, although the ontic state λ is a random variable, it still…[Read more]

Shan Gao replied to the topic Does the psiepistemic view really solve the measurement problem? in the forum 2016 International Workshop on Quantum Observers 3 years, 7 months ago
Hi Matt,
Thanks for your interesting comments, some of which I basically agree.
But I think you misunderstood my paper. The paper does not aim to show the (realist) psiepistemic view cannot solve the measurement problem. Rather, it only shows that the psiepistemic view does not provide a straightforward resolution or a dissolution of the…[Read more]

Shan Gao replied to the topic Does the psiepistemic view really solve the measurement problem? in the forum 2016 International Workshop on Quantum Observers 3 years, 7 months ago
Thanks Arthur for your very detailed and helpful comments. I have learned much from these comments. I will improve my paper according to them. Best, Shan

Shan Gao replied to the topic Does the psiepistemic view really solve the measurement problem? in the forum 2016 International Workshop on Quantum Observers 3 years, 7 months ago
Thanks Mark and Ken for your further comments. I have not thought too much on retrocausal models. I would like to know whether quantum randomness is also inherent in these models, and how these models account for the randomness of measurement results. Best, Shan

Shan Gao replied to the topic Does the psiepistemic view really solve the measurement problem? in the forum 2016 International Workshop on Quantum Observers 3 years, 7 months ago
Thanks Mark and Ken for your very helpful comments. I will need more time to think about them. For now I think Ken’s explanation seems to require the deny of the existence of free fill and essential randomness and have to resort to superdeterminism. Best, Shan

Shan Gao started the topic Does the psiepistemic view really solve the measurement problem? in the forum 2016 International Workshop on Quantum Observers 3 years, 7 months ago
It is widely thought that the psiepistemic view provides a straightforward resolution or even a dissolution of the measurement problem. In this paper we argue that this is not true. In order to explain the collapse of the wave function merely as a process of updating information about the underlying physical state, this view requires that all…[Read more]

Shan Gao replied to the topic How to solve the structured tails problem of dynamical collapse theories? in the forum 2016 International Workshop on Quantum Observers 3 years, 7 months ago
Thanks for your comments, Kelvin. It seems that you did not really understand my solution, which is different from the solution discussed in your paper. In my solution, there are no “zombie tails”. The observer being in the superposition has only one mind with the unique mental content. The key point is that according to my assumption about viv…[Read more]

Shan Gao replied to the topic Can Bohm's theory really solve the measurement problem? in the forum 2016 International Workshop on Quantum Observers 3 years, 7 months ago
Thanks for your further clarification, Peter. I still think that your assumption that the relative positions of the particles determine the measurement outcome requires a wholly new hiddenvariables theory which is different from Bohm’s theory.
Consider your example. If after being measured by the SternGerlach magnet, the two separated wave…[Read more]

Shan Gao replied to the topic Can Bohm's theory really solve the measurement problem? in the forum 2016 International Workshop on Quantum Observers 3 years, 7 months ago
Thanks, Aurélien. I will have a look at your reply. Best, Shan

Shan Gao replied to the topic Can Bohm's theory really solve the measurement problem? in the forum 2016 International Workshop on Quantum Observers 3 years, 7 months ago
Thanks for your insightful comments, Peter. I should have made my argument more accurate. I agree that if assuming the measurement outcome supervenes on a pattern among a number of Bohmian particles, then Bohm’s theory can solve the measurement problem. But I think the assumption seems inconsistent with SQM. Let me restate my argument more…[Read more]

Shan Gao wrote a new post, An argument for ψontology in terms of protective measurements 3 years, 7 months ago
This is my recent paper published in Studies in History and Philosophy of Modern Physics [Free download]. Comments and criticisms are welcome.
Abstract: The ontological model framework provides a rigorous approach to address the question of whether the quantum state is ontic or epistemic. When considering only conventional projective measurements, auxiliary assumptions are always needed to prove the reality of the quantum state in the framework. For example, the Pusey–Barrett–Rudolph theorem is based on an additional preparation independence assumption. In this paper, we give a new proof of ψontology in terms of protective measurements in the ontological model framework. The proof does not rely on auxiliary assumptions, and it also applies to deterministic theories such as the de Broglie–Bohm theory. In addition, we give a simpler argument for ψontology beyond the framework, which is based on protective measurements and a weaker criterion of reality. The argument may be also appealing for those people who favor an antirealist view of quantum mechanics.
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