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Quantum Theory

Quantum physics and related topics.

  1. Started by Beau Got Drums,

    Mighty reader, I'm very intrigued by Physics lately, so much that I built my own laser because inspiration from a youtuber with an amazing community named "Styropyro" I started a project were I am trying to make a really efficient "Van de Graaff Generator" from scrap. But I'm also very interested in Quantum Physics and I wanted to discover new theories and rules, I really wanne get into physics. If people have some suggestions please feel free to leave them down below! Much Much Appreciation, Beau Got Drums!

  2. Started by Butch,

    Is there an answer? If not please share your opinions! A hypothesis I am developing can only be quantized by the smallest possible mass, I cannot locate any information...

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  3. The FMO complex has a size that is within the typical size range for quantum dots, and absorbs photon energy at what appears to be an effective bandgap between 2-3 eV. While various techniques have been used to investigate the behavior of the FMO complex, such as femto photography or polarization-dependent, two-dimensional electronic spectroscopy, see www.sciencedirect.com/science/article/pii/S0006349508702595, the assumption implicit in these analyses appears to be that it is the component molecules of the FMO complex that are transferring energy between each other, as opposed to the FMO complex itself behaving like a quantum dot with a coherent electron attracted to a c…

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  4. Started by ALine,

    When it comes to physics I do not nor will I ever claim to be an expert. Only a curious explorer of knowledge for the application of developing ideas. My question, as stated in the title, is are we observing down too far. Meaning that why are we attempting to go smaller or bigger scale wise when it comes to understanding physics? By this I mean why are we, by we I mean science in general, trying to find an ultimate answer or a theory of everything? Why try and put puzzle pieces that do not fit together , together? I feel as if I already "know" the answer, however I feel as if I do not "understand" the answer.

  5. Started by Lizwi,

    I always think probability is calculated using the function and it's complex conjugate, How is that in my second equation, the functions are different?

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  6. Started by QuantumT,

    We have particle/wave duality. And we have non-locality caused by entanglement. The two best known examples of quantum weirdness. But what if they were not two phenomenons, but two expressions of the same phenomenon? The only thing they have in common is measurement. My theory is that measurement itself is causing both phenomenons. Measurement is locking particle behavior. That would mean that very long distance entanglement is impossible, because you can't maintain realtime measurement of a particle far far away. This also solves non-locality's violation of the maximum communication speed (light speed) in General Relativity. (Einstein would be pleased…

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  7. Started by Carl Fredrik Ahl,

    Hi, I know that laser works by giving atoms in crystals or glasses energy so that they can get excited and then jump back to their steady place and that emitts a photon. I also know that these photos only are one wavelength. What I wonder is how they make the lasers so intense so they can reach very long distances and stay concentrated. What makes laser differ so much from fire? Because the color of fire is also photons emitted from the exciting atoms when they jump back.

  8. Started by Moreno,

    Do exist some kind of Mott or charge-transfer insulators which do NOT undergone metal-dielectric transition and always remain Mott or charge transfer insulators regardless density of carriers increase? In one word they do not suppose obtain metallic properties.

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  9. Started by Carl Fredrik Ahl,

    Hi, In this video (  Look from 3:30) they show how they use capacitors in gyroscopes. I wonder how these capacitors operate with the masses of the gyroscope.

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  10. Started by Itoero,

    What's the maximum velocity of electrons in a superconductor?

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  11. Started by Who are you?,

    Does anyone have any evidence to prove that this is possible please provide real evidence for either side, because just simply bashing the idea is just as barbaric as supporting something with no logic evidence either so please don't just shit talk without any legitimate evidance to back it up or you're be is going to get called out. I am interested if it is possible that gold clusters can be broken down and held in a monoatomic state like some gasses. I've heard about this Orbitally rearranged monoatomic evidence theory for a while and I have no reason to either support nor completely bash it sense I have not found one legit article to either p…

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  12. Hi, In this video they explain how the resistance in the resistor changes depending on the temperature and you can therefore calculate the temperature. I wonder why the resistance change depending on temperature.

  13. Started by Carl Fredrik Ahl,

    Hi, I know that indoor air quality sensors works by measuring the amount of oxygen, carbon monoxide and carbon dioxide. I know that oxygen and carbon monoxide is measured by consuming it and get the electric current from that consumption to see the quantity of the gases and that carbon dioxide is measured with an infrared sensor. I wonder how the sensor can consume oxygen and carbon monoxide and then get the electric current. I also wonder how the infrared sensor gets the amount of carbon dioxide. Does it calculate how much infrared light is reflectes back to the sensor?

  14. Started by martinalexh,

    Hi, I have a question in the quantum chemistry about slater determinants. From how many spatial- and spin- coordinates does the slater determinant of a N2-molecule depend on? And how from how many spin- and spatial coordinates does the spin orbital of an electron generally depend on? i know tht spin orbitals are made of a spatial and a spin part. The spin part is consists of beta and alpha - therefore 2 coordinates, right? And the number of spatial coordinates depends on the kind of the orbital (e.g. p-orbital: 3 coordinates), right? Therefore I wuld assume that the slater determinante of a N2-molecule dpends on 6 spatial- and 2 s…

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  15. What are some of the mysteries in physics that we have yet to be understood or discovered?

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  16. They don't violate anything because they are virtual particles and only exist for less then a Planck instant the way I understand it. https://www.vox.com/science-and-health/2018/3/14/17119320/stephen-hawking-hawking-radiation-explained Not sure how you arrive at that conclusion, but BH's for example, Bugger! this tells it far better then I here....https://www.google.com.au/search?q=do+black+holes+vilate+conservation+of+energy+laws%3F&oq=do+black+holes+vilate+conservation+of+energy+laws%3F&aqs=chrome..69i57j69i64l2.16975j0j7&sourceid=chrome&ie=UTF-8 "Neither the existence nor the behavior of black holes violates conservation laws. ... T…

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  17. According to physics/quantum physics how would teleportation of an object from point a to point b be possible? Or maybe lets start off with a single atom or subatomic particle, how can that be teleported from a point a to point b.

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  18. Started by Carl Fredrik Ahl,

    Hi, I have heard that both fission and fusion take place in a hydrogen bomb. Is it true that the fission part is to make the fusion part very hot so that fusion can take place? Is it hydrogen atoms that will fuse together to helium atoms and this will make the big explosion?

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  19. Started by Carl Fredrik Ahl,

    Hi, I wonder why uranium (don't remember what isotope) splits when a nuetron hits it. I also wonder how the initial neutron get shot at the first uranium.

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  20. Started by Mordeth,

    Hello, I have a question related to Eise's very useful explanation above, which was provided in another post. My question is related to what appears to be the crux of quantum entanglement and the subsequent loss of entanglement via measurement. My question is related to the statement by Eise above that says: "The 'spooky' aspect comes in when we do not know from each other in which direction we measure the spin. It can be vertical, horizontal, 30o, 45o, 55.3977o. What we find is that the correlation is stronger than one would expect if we would assume that the particles already had a definite spin from the beginning. " Is it possible to explain these sta…

  21. Are the shapes of orbitals like s which is sphere due to wave function or due to square of the wave function ? many textbook refer that atomic orbital is the space where an electron can be found. But how is this possible when from wave function we dont get any information for the probability density ? do the textbooks refer to the ψ^2 when they refer to space ?

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  22. Started by sayan23,

    The quantum world or the world of atoms and molecules is quite different than our world as we know it. The scientific laws in the quantum world are different than the ones we experience in our day to day life. But one must think how can we behave differently than the particles we are made of? That is a very simple question but with no satisfactory answer as to why. The differences in the quantum world and our world became significant in 1801 when Thomas Young conducted a peculiar experiment that is known as “The Double Slit Experiment“. Although originally designed to study interference patterns observed when light travels through slits, the experiment pointed out some ga…

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  23. Started by jajrussel,

    I have read that when an electron drops an energy level a photon is given off. Are there any other conditions were a photon is produced? Any other Particle? I'm going to search. I'm just hoping for a shortcut. A point in the right direction.

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  24. When you entangle photons, you entangle bosons. In order to entangle electrons, you need to split a cooper pair which is a composite boson. -A photon has no mass and electrons in a superconductor behave like they have no mass. What causes the bosonic behavior of entangled particles? Have they ever made or found true entangled fermions?

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  25. Started by Pesque,

    Quantum like standard physics requires that the 2nd law of thermodynamics must be observed in order to have a model for retro causality. Thermal heat is transferred from a higher temperature energy to a lower temperature body, providing a clear causality in a forward linear progression into the future. Retro causality requires the opposite, a lower temperature body passing heat to a higher temperature body. The 2nd law was used as a principle as to why time regression was not possible. The following article points to an experiment where using quantum harmonic oscillators in two different temperature reservoirs found that both reservoirs gained in temperature. This may…

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