Questions tagged [quantum-interpretations]
This tag is for questions relating to what, if anything, the quantum mechanical formalism and experimental results say about the way the world works.
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An extenstion of Afshar's experiment [closed]
If quarter wave plates are added to Afshar's experiment with the fast axes horizontal and vertical, and the input can be wither a statistical 50/50 mixture of $|H\rangle$ and $|V\rangle$ or a mixture ...
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Is This Video on Bell's Theorem Wrong?
In this Veritasium video titled There Is Something Faster Than Light wrong about the interpretation of Bell's Theorem and Bell Test.
At 38:30, it states
So quantum mechanics is non-local, but it ...
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Is collapse a matter of wholes and parts? [closed]
Yesterday I was watching a video on the Wigner’s Friend thought experiment, and it led me to this line of reasoning involving two distinct schools of thought:
(Objective Collapse)
If I believe that ...
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What is the correct way to to think of quantum fluctuations? [duplicate]
What is the correct way to think of quantum fluctuations? Do we think of them as arrows? particles? waves? I understand it's very elementary, but I don't know how to correctly intuitively think of it. ...
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What happens to a decohered branch if recoherence is hypothetically achieved in the Many-Worlds Interpretation of quantum mechanics?
In the Many Worlds Interpretation of quantum mechanics, branching is usually described as a consequence of decoherence. When a quantum system becomes entangled with its environment, the combined ...
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Effective hamiltonian and hidden-variable theory
In classical mechanics, given the joint probability distribution $f(t,x,p)$ over the position-momentum phase space $(x,p)$, we can describe its time evolution via the Liouville Equation:
$$\partial_t ...
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Wavefunction Collapse with imperfect information
Consider the following scenario:
You have a particle detector that clicks when a quantum particle is near its vicinity. This is a "position measurement." Therefore, under the Copenhagen ...
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How do entangled particles stay correlated if they do not interact with each other at measurement?
I'm having trouble understanding how two entangled particles stay correlated once they are measured. As an example, if they are anti-correlated in their spins, and one particle is measured to have a ...
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Why do interpretations of quantum phenomena focus on QM rather than QFT?
After reading a number of posts here in the last few years I'm left wondering why most questions about the interpretation of quantum phenomena relate to quantum mechanics rather than the more modern ...
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Is there a loophole in Bell's theorem because of our ignorance of the state of the measurement device?
Bell assumes that there exists a function $f$ which takes the hidden variable $\lambda$ and the setting of the measurement device : $\vec{a}$ or $\vec{b}$, as the input and gives the result of the ...
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Does Quantum Mechanics (QM) Violate Propositional Counting Logic (PCL)? [closed]
I have been in discussion with folks about the last 10 mins of the MIT Lecture 2 - Quantum Mechanics course.
Theorem. Given three propositional statements (about objects), A, B, C, and given a finite ...
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How does the path integral for the Universal Wavefunction account for future internal decoherence events?
I'm trying to solidify my understanding of the path integral formalism when applied to the entire universe, and I've run into a conceptual point that I'd like to clarify.
Let's assume a purely ...
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Is the ensemble interpretation of quantum mechanics the single paradox free interpretation of Quantum Mechanics?
The ensemble interpretation of quantum mechanics is as far as I know the single paradox free interpretation of quantum mechanics. Am I overlooking an objection to it, a paradox of it or an alternative ...
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How Does MWI explain Type I PDC Photon Polarization Entanglement?
Calling MWI knowledgeable members and advocates!
My question includes a deep dive into how Type I parametric down conversion (PDC) entanglement is created, and specifically mapping the narrative for ...
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Doesn't the Many Worlds Interpretation simply move the collapse of the wave-function to the brain/consciousness? [closed]
As far as I understand as a layman (and forgive me if I say anything wrong, I am merely stating my current understanding), quantum mechanics predicts outcomes based on a wave function, which is a ...
