
Shan Gao started the topic What does it feel like to be in a quantum superposition? in the forum 2016 International Workshop on Quantum Observers 3 years, 8 months ago
It has been realized that the measurement problem in quantum mechanics is essentially the determinateexperience problem in the final analysis. The problem is to explain how the linear dynamics can be compatible with the existence of our definite experience. This means that in order to finally solve the measurement problem it is necessary to…[Read more]


Shan Gao replied to the topic A New Ontological Interpretation of the Wave Function in the forum Meaning of the wave function 4 years, 1 month ago
Hi Peter, thanks a lot for your very helpful comments. Your questions are closely related to the understanding of RDM (random discontinuous motion) of particles. RDM gives an ontological interpretation of the wave function, but the instantaneous picture cannot explain interference and measurement. To explain the former, we still need the law of…[Read more]

Shan Gao started the topic Wavefunction collapse, nonlocality and preferred Lorentz frame in the forum Collapse theories 4 years, 1 month ago
In this paper, we first give a new proof of nonlocality in standard quantum mechanics based on the possibility of superluminal signaling. Next, we argue that the new proof may also imply that quantum nonlocality requires the existence of a preferred Lorentz frame. Thirdly, we give a few arguments for the detectability of the frame, and illustrate…[Read more]

Shan Gao started the topic Notes on the ontology of Bohmian mechanics in the forum Bohm’s theory 4 years, 1 month ago
It is argued that in Bohmian mechanics the effective wave function of a subsystem of the universe does not encode the influences of other particles on the subsystem. This suggests that the ontology of Bohmian mechanics does not consist only in Bohmian particles and their positions. It is nonetheless pointed out that since the wave function in…[Read more]

Shan Gao started the topic A New Ontological Interpretation of the Wave Function in the forum Meaning of the wave function 4 years, 1 month ago
In this paper, we propose a new ontological interpretation of the wave function in terms of random discontinuous motion of particles. According to this interpretation, the wave function of an Nbody quantum system describes the state of random discontinuous motion of N particles, and in particular, the modulus squared of the wave function gives…[Read more]

Shan Gao started the topic Are unitarily inequivalent representations real? in the forum Foundations of quantum field theory 4 years, 2 months ago
The quantization of a theory with an infinite number of degrees of freedom, such as a field theory, leads to unitarily inequivalent representations of the canonical commutation relations. The occurrence of inequivalent representations is widely acknowledged as a grave obstacle for interpreting QFT ontologically. One possible stance is to dismiss…[Read more]

Shan Gao started the topic A Conjecture on the Origin of Gravity in the forum Foundations of quantum gravity 4 years, 2 months ago
In this paper, we argue that a certain kind of discreteness of spacetime may imply the existence of gravity as a geometric property of spacetime described by general relativity (GR). In particular, the dynamical relationship between matter and spacetime holds true not only for macroscopic objects, but also for microscopic particles. This…[Read more]


Shan Gao replied to the topic What Retrocausal Explanations Look Like (Online Tues. 1/13, 11:30am PST) in the forum John Bell Workshop 2014 4 years, 7 months ago
Hi Ken,
Many thanks for your reply and explanation! I would like to learn more details about your retrocausal theory by reading these two papers.
Best,
Shan 
Shan Gao replied to the topic What Retrocausal Explanations Look Like (Online Tues. 1/13, 11:30am PST) in the forum John Bell Workshop 2014 4 years, 7 months ago
Hi Ken,
This is a very interesting paper. I would like to know whether a retrocausal explanation has the ability to derive the Born rule. I think this question is closely related to the missing account of how a future measurement setting influences the measured system physically (which has been referred to by you). It seems that only after we…[Read more]

Shan Gao replied to the topic A new proof of nonlocality in standard quantum mechanics in the forum John Bell Workshop 2014 4 years, 7 months ago
I think my new strategy to prove nonlocality may be more helpful for understanding the nature of nonlocality, e.g. determining whether the nonlocality requires the existence of a preferred Lorentz frame.
It is noncontroversial that the existence of the above hypothetical superluminal signaling is incompatible with the theory of relativity, and it…[Read more]

Shan Gao replied to the topic A new proof of nonlocality in standard quantum mechanics in the forum John Bell Workshop 2014 4 years, 7 months ago
Hi Shelly,
Thanks again for your further comments! I still think my proof of nonlocality does not depend on the meaning of the wave function. No matter the wave function is epistemic or ontic or something else, the wave function may be changed in a linear way by an usual external potential according to the Schrodinger equation, and it is also…[Read more]

Shan Gao replied to the topic Local Causality, Probability and Explanation (Online 12/30 @ 2 p.m. UTC – 7 ) in the forum John Bell Workshop 2014 4 years, 7 months ago
Hi Richard,
Many thanks for your kind reply! I will consider my argument more deeply. But I still have a question for your reply. I think the existence of precise anticorrelation requires that the wave function of the photon on every side need to be collapsed as in standard quantum mechanics. I would like to know what you think about this…[Read more]

Shan Gao replied to the topic Local Causality, Probability and Explanation (Online 12/30 @ 2 p.m. UTC – 7 ) in the forum John Bell Workshop 2014 4 years, 7 months ago
Hi Richard,
I have a short comment on your very intriguing paper. It seems that in your formulation of QM there is still the collapse of the wave function, though the wave function is not ontic. Then it seems that my new proof of the quantum nonlocality also applies to your theory. My proof does not depend on the meaning of the wave function,…[Read more]

Shan Gao replied to the topic Bell on Bell’s theorem: The changing face of nonlocality in the forum John Bell Workshop 2014 4 years, 8 months ago
Hi Dieter,
Thanks for your clarification! I will look at your paper later.
Best,
Shan 
Shan Gao replied to the topic Bell on Bell’s theorem: The changing face of nonlocality in the forum John Bell Workshop 2014 4 years, 8 months ago
Hi Travis,
I agree that finding an image of the familiar 3D world is an issue for the Everettians. I also hope Chris can clarify some of these things.
Best,
Shan 
Shan Gao replied to the topic A new proof of Bell's theorem (Online 12/30 @ 8 p.m. UTC4) in the forum John Bell Workshop 2014 4 years, 8 months ago
Hi Shelly,
Many thanks for your very helpful comments on my new proof of Bell’s theorem. You pointed out a very important potential issue, and I should have clarified my argument concerning this point. Here are my answers.
First of all, as you may admit, when assuming that the wave function is ontic, my proof is valid. I think this is still…[Read more]

Shan Gao replied to the topic Bell on Bell’s theorem: The changing face of nonlocality in the forum John Bell Workshop 2014 4 years, 8 months ago
PS. It is a fundamental and widely accepted assumption that a measurement result exists universally, and in particular, it exists for every observer, independently of whether the observer makes the measurement or knows the result. But the Everettian theory violates this assumption.

Shan Gao replied to the topic Bell on Bell’s theorem: The changing face of nonlocality in the forum John Bell Workshop 2014 4 years, 8 months ago
Hi Travis,
I think the authors are right in suggesting that the correlations in question don’t yet exist (when the state is 0.9) but do exist (when the state is 0.10). The reason is that in Everettian theory a measurement result exists only relative to the systems which are decoherent with respect to the measurement result, and it does not e…[Read more]
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