Back in the day, there were a few Quantum Interpretation polls on here, as of late I have not seen any. I love that we now have a sub-forum for Foundations discussions. I figured it would be interesting to see how the participants of PhysicsForums feel about the different interpretations these...
Jim explores what are the most popular interpretations of quantum mechanics and how we might need to be a little more specific when we talk about ‘reality’. Excellent layman's explanation of the Bell Inequality experiments.
Let us consider QFT in Minkowski spacetime. Let ##\phi## be a Klein-Gordon field with mass ##m##. One way to construct the Hilbert space of this theory is to consider ##L^2(\Omega_m^+,d^3\mathbf{p}/p^0)## where ##\Omega_m^+## is the positive mass shell. This comes from the requirement that there...
Is the problem with interpretations of quantum mechanics that one can describe the universe consisting of "stuff" that exists ontologically in different but conflicting ways, so that the universe can really only be described informationally instead of ontologically?
That is: does the universe...
The Standard Model Lagrangian contains terms like these:
##-\partial_\mu \phi^+ \partial_\mu\phi^-##
##-\frac{1}{2}\partial_\nu Z^0_\mu\partial_\nu Z^0_\mu##
##-igc_w\partial_\nu Z^0(W^+_\mu W^-_\nu-W^+_\nu W^-_\mu)##
How should one interpret the "derivative particle fields" like...
Hello, I have a question on Autocorrelation of OLS model.
So I encountered a autocorrelation error, and use Cochrane - Orcutt Two-step Procedure(CORC) to fix it. And my OLS became GLS. And I have no idea how to interpret the coefficient on my initial X and Y with the new model. I mean something...
OK, so, I've forgotten more statistics than my students will ever know, and I'm not too proud to ask for help, cuz I'm just blanking out on this. I would appreciate it if someone could patiently follow along and let me know what I've got right or wrong please.
My understanding of the chi-sqr is...
This question is about experiments involving entangled electrons or any other fermion for that matter. I’ll get to that in a sec. I’ve been interested in understanding interpretations that have retrocausality. (TIQM by Cramer, Wheeler–Feynman absorber, time symmetric by Price) It’s easy to...
I have a few questions about interpretations that use retrocausality. I only know of 2.
1. TIQM - Transactional Interpretation of QM by John Cramer 1986
https://en.wikipedia.org/wiki/Transactional_interpretation
2. TSQM - Time Symmetric QM by Huw Price...
I have read this paper http://www.sciencedirect.com/science/article/pii/S1355219813000695 that the author try to said that einstein not believe that gravity is not cause the space time curvature. I want to know that this is true or not. Because when I have read about general relativity I always...
I was wondering if it is possible that not only the past influences (or causes) the future, but also the converse, that the future influences the past. I imagine waves of probability propagating from the future into the past as well as from the past into the future, thereby influencing each...
Once I heard a fellow-layman on QM say that he imagined two entangled particles never been separated in the conceptual sense, that is: the two particles are conceptually 'one', only they connect two parts of spacetime, and are so able to exhibit correlations over spacetime with respect to the...
Consider a fully entangled pair of polarized photons, A and B, fired at two detectors with polarisation filters in front of them. I have to get a little philosophical to understand the way the interpretations of this experiment play out. My knowledge is still very basic but I'm working on it...
They are subjective even in the classical, nonrelativistic mechanics of a pendulum, since the notions appear when you try to relate the theory to a real pendulum. In classical, nonrelativistic mechanics, the interpretation of the words ''observation'', ''experiment'' and ''measurement'' needed...
Could physics ever be able to confirm that a certain interpretation of quantum mechanics is correct or is the matter entirely philosophical and thus doomed to the depths of subjectivity?
Are there any interpretation to general relativity that described gravity as field (which do not have to be vectorfield, but may have 10 components) and physical-space as classical euclidean space?
Can it be mathematically proven that such interpretation can not exist?
I am not talking about...
In the following, I want to consider both photons in a sharply focussed, monochromatic beam of light (''type P'') and electrons in an electron beam (''type E'') on the same footing. In the following, X is either P or E. If we only concentrate on the internal degrees of freedom, both kinds of...
In this thread, I want to discuss the implications of quantum field theory for the interpretation of quantum mechanics. To set the stage I'll import in the next few posts a number of posts from other threads. The latest of these is the following:
Only if it is the sole particle in the whole...
It’s easy enough to find the interpretations that break counterfactual definiteness in order to maintain locality. But I’m not sure how to find the ones with something (perhaps information) moving backwards through time.
The reason I ask is I’ve always had trouble with the idea that a...
There's something I don't quite get about most illustrations about Bell's inequality theorem. I will explain what:
Consider a pair of entangled photons fired at two arbitrarily oriented polarizers. I most explications, it seems the author suggests that the hidden variable represents the binary...
Hi,
I've been reading some (very) basic texts on decoherence and have some questions about it:
1. What is the difference between decoherence and dephasing?
2. Assuming decoherence, can we completely do away with collapse theories (i.e. theories in which wavefunction collapse must be...
I'd like to learn how I can better understand research papers/scientific studies, judge the quality, the methods used, find out who funded it, etc. I'm a layperson.
In researching various topics, especially controversial subjects, I try to find the actual scientific papers behind everything...
Hi!
I am new to ANSYS and I am trying to understand a simulation done by some one else.
I have a disk with a spiral in it, and it looks like there is a remote force being applied at the centre of the disk, but spread over the entire face.
I don't understand how this force is being spread...
I just did this following exercise in my text
If C is the line segment connecting the point (x_1,y_1) to (x_2,y_2), show that
\int_C xdy - ydx = x_1y_2 - x_2y_1
I did, and I also noticed that if we put those points into a matrix with the first column (x_1,y_1) and the second column (x_2,y_2)...
Title basically says it all. I'm a physics undergrad trying to wrap my head around quantum physics, and I was hoping people here could help. My question comes from something in one of my textbooks. It tries to explain particle-wave duality through a piece of string, which I'll quickly go over as...
Hey Guys,
so i was reading Hawking&Ellis a bit and still encounter always problems with the Penrose-Diagrams. Looking at the Penrose-Diagram for the rotating Kerr-Black hole (just one illustrating picture at the end) i come up the following question:
Why are there TWO regions III and III ?
In...
What are some good textbooks dealing with various Interpretations of Quantum Mechanics? I am not asking for popular science books. I have a book called 'Understanding Quantum Mechanics' by Ronald Omens on the consistent histories approach and I am looking for something like that.