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Quantum Theory

Quantum physics and related topics.

  1. Hello, I have read many posts where I find the above expression (Most notably from Mordred) but I only encounter it as part of explaining some other topic. Could you please expand on this with more information? It is a really interesting subject for me.

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  2. Started by Severian,

    Very often people come to these fora with a belief that our current theories of physics, such as the Standard Model or relativity, are flawed and present some alternative of their own. On the whole, this is a fine attitude to take - we should always be skeptical, and it is good if people can think a little 'out of the box' and generate ideas which more standard thinkers may not have come up with. I have always thought that genius was not an ability to think 'better' than everyone else - it is an ability to think differently from everyone else. However, when coming up with a new theory it is important that it should be better than the old one. Therefore the first step …

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  3. In de Broglie–Bohm theory, the pilot wave guides particles but is usually treated as an abstract object in configuration space. I’m exploring whether the pilot wave can instead be understood as a real constraint structure that exists prior to measurement and determines what outcomes are possible. From this view: In the double-slit experiment, what passes through both slits is the constraint structure, not a particle. Interference arises from how these constraints overlap. Measurement corresponds to a selection (locking-in) of one allowed outcome, not the revelation of a pre-existing classical fact. My question: Is there any principled reason the pilot wave cannot be …

  4. Could there be a "Communication Theorem" instead of a "No-Communication Theorem" in quantum entanglement if we could measure and manipulate negative energy. According to the ER=EPR conjecture by Susskind and Maldacena, traversable wormholes—which are postulated to require negative energy (or a vacuum force)—might the equivalence lead to a "Communication Theorem"? Then could the application of negative energy in quantum entanglement bypass the conventional requirement for Bell state measurement and classical communication, which are necessary in standard Quantum Teleportation?

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  5. Started by INAK,

    Hello all! I'm new to the science forums in addition to quantum theory, and I'm sure there are more like me. I was wondering if any of you have any tips to learn about this topic as I have found it difficult as a newcomer to understand / find information about it. Thanks!

  6. Started by Modafinil,

    Hello All! I wish to understand what matter is. From E=MC² we find matter is interchangeable with energy, and doing research matter is energy that isn't moving (that much, temperature). Electrons kind of work through a wave function, and they are both matter and energy? Protons and Neutrons aren't silly ball magnets, but are also waves? Is everything waves or energy??

  7. Started by Lafate,

    --- Resonance, Coherence, and the Emergence of the Planck Entity Framework, this is not a paper to present a new theory its the ramblings of an old man who has read many physics blogs and watched more Sabine Hassenfeld videos than most would admit to and just have questions dealing with logistics arising from some unanswered questions about physics so, the purpose of this narrative is to give people who do know something a reason to smile at my ignorance and to invite commentary positive or negative just be kind. Radical question about Particle formation? This question for consideration did not begin with equations but it began with patterns. It began with the Chladni pl…

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  8. Started by Alenruffneck,

    So I've been watching some documentaries involving black holes and the information paradox involved with quantum mechanics which says information can never be destroyed... I had an idea to this theory involving black holes and thermal or 'hawking' radiation that doesn't contain information as its released, in a sense it's blank data... I understand everything we see can be traced back in some way to show all its "lifelong information" so I ask anyone to take a recycled water bottle, and give me a detailed description of everything the atoms in that bottle ever were before they were a scrap bottle. Not just scraps of plastic remolded into another bottle, but according to …

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  9. Is part of the evidence for superposition that entangled particles are never found in similar states when their wavefunction is collapsed? Does it follow that If they weren't connected, we would expect to see some statistical frequency of similarity of states as well?

  10. Found this paper while searching for hyperdimensional solutions for non-locality: https://figshare.com/articles/journal_contribution/Hyperdimensional_Biasing_Path_Integrals_A_Framework_for_Entanglement_and_Non-Locality_pdf/29304536?file=55588808 It does make sense that a hidden geometry could be at play, and it's usually destructive, which is why gauge phenomena can't move in a hyper direction. But, there are some other implications about non-locality, such as the entire universe is folded or crumpled up into a nanoscale hyperdimensional volume, or did I misunderstand the paper?

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  11. Started by Killtech,

    Quantum physics introduces a new concept of probability which at first glance differs quite a bit from original mathematical concept of probability as defined by Kolmogorov. Sadly it is rarely explained how these frameworks relate to each other and if there may be something missing in mathematics. For a mathematician it feels even more annoying as there is no experiment that is able to challenge classic probability with a result it cannot reproduce. It turns out that one can take great value to discussing such topics with AI and learn a lot from them, if one has deep enough knowledge of a lot of related topics for a proper discussion. Now, the AI noted the Kochen-Specker …

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  12. From the BCS theory of superconductivity is well known that the superfluid density smoothly decreases with increasing temperature. This means that some superfluid carriers annihilate when heated, become normal and, thus, dissipate their (angular) momenta on atom lattice. We can induce a persistent supercurrent (much weaker than a critical current) in a massive ring below Tc. After that we slowly increase the temperature, and then we must observe a smooth decrease in the actual supercurrent, because the momenta of the annihilated electron pairs vanish on the lattice, reducing the total supercurrent momentum. Thus, we can show that the microscopic BCS approach is in line wi…

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  13. Started by Danvalli,

    Hello to all the many people who are far more intelligent than I. I have recently become very interested in the field of quantum physics due to the whole mystery surrounding the whole topic. There is a significant amount of media regarding this topic, however it is rarely explained in more detail than "some people did some math wizardry and some really weird stuff came out". As to begin to have a slight understanding of the theory which has been the most accurate thing humanity has conceived of, I began with a shot in the dark and typed "Introduction to quantum mechanics" into the google search bar, and clicked on the first link that I saw that did not appear to be an ad,…

  14. Experiments on electron vortices show that they can adopt discrete energy levels in a field-free space. However, quantum mechanics requires an external potential to work. So in a fusion of the latest research on optical OAM and the classical Sommerfeld hydrogen atom fine structure theory, a photonic toridal vortex (PTV) model with an internal potential is developed. This gives accurate fine structure values. Some novel characteristics appear in the theory. (1) The toroid is constructed by curving the trajectory of optical OAM. (2) The poloidal rotation generates a magnetic momentum field and the toroidal rotation creates an electric momentum field. These fields result fr…

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  15. Started by JC_TheCreation,

    What Element Data does the (1-18) Standard Periodic Table numbering Correspond to? Also, why are the "Rare Earth" Elements always excluded from this numbering system? In my Chemistry Textbooks it just says, "to Save Paper Space" but that doesn't seem like a very scientific reason to remove the Lanthanides and Actinides from their correct positions and exclude them from the numbering as the Standard.

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  16. Started by paulsutton,

    I sort of understand what has happened with the Experiment with turning Lead in to gold. https://www.symmetrymagazine.org/article/lhc-near-miss-collisions-turn-lead-into-gold So given the energy required to remove electrons is called Ionization energy and this is detailed as 1st 2nd, 3rd Expressed in Joules (or KiloJoules / mol / Electron Volts Periodic Table GuideIonization Energy Chart of all Elements (Full Chart Inside)Ionization energy chart of all the elements is given below.First ionization energy, second ionization energy as well as third ionization energy of the So what energy is required to strip all the electronic from heavier elements such as Lead, which a…

  17. Started by LoggerTodd,

    Hi I am new here. Is there any software available that can compute quantum level transitions? For example: I input the line spectra values of an element and it would compute all the transitions for me.

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  18. Hey everyone, I’ve been reading about quantum tunneling and how particles can pass through energy barriers, which seems to challenge classical physics. I understand it’s already applied in technologies like tunnel diodes and flash memory, but I’m wondering, is there any serious research into scaling tunneling effects for use in energy transfer or generation? Could this concept theoretically be used in next-gen electronics or even fusion tech, or are we fundamentally limited by the probabilities involved? I'd love to hear your thoughts or if anyone knows of experiments or prototypes exploring this direction. Some resources I checked out: https://www.youtube.com/watch?v=cTx…

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  19. The article in the attached file says that microwaves were used to create a quantum entanglement between two macroscopic mechanical oscillators. But what is the specifications of the microwaves used? Wavelength, intensity, whether it is lidar-level specific or a range of frequencies that can be produced by common microwave sources, and so on?

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  20. On my recent trip to the London Natural History Museum I was struck by the number of minerals that, while not metals, nevertheless have a metallic sheen or lustre. Iron Pyrite (FeS₂), "Fool's Gold" is a classic example. Semiconductor metalloid elements also have this property. I'm aware that metals have this lustre due to the freedom of movement of electrons in the conduction band, which are (in simplistic terms) set into sympathetic oscillation by incident light. However in these non-metals and metalloids, the bonding electrons should by rights be in the valence band and thus not available to move freely in the way necessary to reflect incident light. Hence to…

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  21. Started by Gian,

    Can't get my head around this. "Spin is the intrinsic angular momentum of particles. Spin is given in units of ħ which is the quantum unit of angular momentum where ħ = h/2π = 6.58x10-25 GeV s = 1.05x10-34 J s" At this stage I just want to know; 1 When it says "spin" is the "angular momentum," does it mean the speed that these particles (Fermions and Bosons?) rotate at, or what? 2. What's the h in the equation h/2π = 6.58x10-25 ?? 3. Is the funny symbol ħ to do with something called the planck constant? Cheerz GIAN🙂XXX science education age about 12½

  22. Started by Growl,

    You are playing a video game, you have received a "gift" box, it could contain one of many items... has the box contents been determined as it was presented or will the contents be determined as you open it? Is the box empty or does it already contain a gift?

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  23. Started by geordief,

    Are there examples of how acceleration is treated in quantum theory? If a classical system is accelerated I have a picture of a wave traveling through the system like if you were to pull a string or push a rod. What happens in "comparable" situations when the systems are quantum? Does "acceleration" mean anything under those circumstances?

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  24. Started by Anchovyforestbane,

    I'd like to learn how to identify substances given NMR calculations. If you have or know where to find such information, it would be greatly appreciated.

  25. I have found an information about the interpretation based on the two-state vector formalism (TSVF). I will try to retell in my own words what I saw, but I apologize in advance for not understanding many of the said. It is usually considered that the wave function "collapses after measurement", i.e. the collapse goes from the past to the future. However, in fact, we can just as well consider that the measurement collapses the WF from the future to the past (i.e. firstly a unitary evolution goes from the future to the past, then a jump due to measurement, etc.). The idea of weak measurements is based on the fact that you can simultaneously use two wave functions …

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