Quantum Theory

With the double slit, experiment we show the double nature of light and matter as wave and particle. In particular, the so called "which way" thought experiment illustrate the complementary principle. In my book, this experiment is analyzed putting a series of particles in front of one of the two slit, so when the electron pass through the slit it scatter with the particles, changing the component of the momentum perpendicular to the direction of motion Δpy. Using the uncertainty principle, it's said that the uncertainty on the position of the electron is now Δy<<D with D the distance between the two slits, and consequently, Δpy is so large that the interference pat…

Does Classical Gravity exist in the "atom." If not what keeps the atom held in place.. Ok so the strong nuclear force...understood.. Is this strong nuclear force, the same that governs the Macro Universe? Is the strong nuclear force another name for Gravity?? F = m1*m2/ "the distance of both "from their centers squared"

In QM, is velocity another word for radius? I'm referring to the idea of quantized angular momentum with magnitude and direction...The Direction is Plank's Const. From what I gather it appears this vector direction points in "All Directions." That's where the OP question comes from..

So Plank discovered that: Energies obsorbed or emitted by atoms were quantized, which means their values were restricted to certain quantities..If this relation were linked to a car driving, the car could only move at discrete values of h... So if "nature" ie waves represents the flow of energy, or even disturbances in a medium at rest, (or using time with distance as in our car example) distance/time = rate, similar to frequencies, waves and etc Would this mean, all things are accellerating? With this information it's hard to understand the link between frequencies, waves and the math used that predicts physical behavior..

Hello. I have perhaps a high-level lay understanding of the Natural World, and a bit of an imagination. I watched a video explaining the conflict between General Relativity and Quantum Mechanics. At 11:12, this idea came to mind: does superposition indicate or result from gravity at the quantum scale?

Why Does QM Wave Functions Use Pi? Does this mean waves travel in perfect partial circles of pi? Or fractions of pi?

While electron and proton being far apart are allowed to be imagined as nearly point particles, when they approach ~10^-10m (or much more for Rydberg atoms), electron is said "to become" this relatively huge wavefunction - orbital, describing probability distribution of finding electron (confirmed experimentally e.g. https://journals.aps.org/prb/abstract/10.1103/PhysRevB.80.165404 ). Can we specify in what e-p distance this qualitative change happens? How to think about this orbital from QM interpretations perspective - is it superposition of electron (indivisible charge) being in all these places? E.g. in Many Worlds Interpretation, should we imagine that …

In the principle of nonlocality or not: Either the information is given at the start of the entanglement, then the information is given thereafter until it is read; Or the information is given later when we discover the state of one of the two praticles which acts on the other not instantly at c speed?

Hello smart people! I'm not a physicist, nor do i have any degree in physics, but i'm a Senior Software Engineer whom like reading lot of popular science. One of the topics I'm curious about most, is Quantum Physics, specifically all the oddities around it, at least, when trying to interpret the meanings into our world at large scale. It's being said that when two or more quantum particles are entangled, they have a special bond, where if you "observe" one, it's "multiple simultaneously state", say spin, collapses into specific state, and at the exact same time, all other entangled particles states collapses into the same state, so when they are observed (s…

Photons are only a model created to fill our incomprehension. We do not know what light actually is. We create models based on our analysis. And analysis on light showed us something we cant really understand so we called it photons. Dont be a fool, create new models come on.

As Quantum physics is new, strange, unique and challenging field of Modern physics. Things would be different if the preset knowledge was avoided in the field and a fresh start with a wide horizon was applied. As per the Schrödinger’s cat experiment which he argued, that the cat was alive or dead both at the same time until we open the box and see it for ourself. Just zooming out this experiment a bit. Let's say person 'A' put the Cat in the box and person 'B' arrives late and saw the box only. Person 'A' told him that there is a cat inside this box and you need to tell whether the cat is alive or dead. This would be a mystery for person 'B' point of view. But the on…

What evidence is there to support the suggestion that time is continuous and not granular, or vice versa, or both, or neither, or something else? What evidence is there to suggest that relative-frame-of-referenced simultaneous events are a reality? How do we measure two simultaneous events and declare they are simultaneous if all observables and measurements are ultimately limited by HUP? We may synchronise two atomic clocks, but how do we know they are synchronised without measuring them and how do we know after our measurement they are still synchronised? How can we be certain at the time of measuring two events, that the clocks were synchronised? In a volu…

I am new to this forum and forums in general. Please let me know if I am not following the rules, or have posted to an incorrect topic. I did search before posting, but please let me know if I missed a thread that answers this. I have done a little bit of reading about the ideas behind Quantum Physics, but am definitely A BEGINNER and do not understand the formulas behind them at this time (I am not yet sure how to start tackling that part). I am looking to get the basics of the ideas involved. It is likely that I will use terms incorrectly, and I welcome polite explanations of my mistakes. I will also ask questions in different ways, so please know I am not being ar…

I am failing to understand spin. I believe any object when rotated 360 degrees will return it faces to their original position. What does spin 1/2 and spin 3/2 mean?

I’m torn. On one hand, it seems pretty obvious that humans can’t be in 2 places at the same time like atoms can. Otherwise, we should observe this in our daily lives without needing a microscope. On the other hand, humans are made of atoms, which are in turn made of subatomic particles. This kind of begs the question of how big an object has to be before quantum rules stop applying.

"The correspondence between fermions and bosons of identical mass that is postulated to have existed during the opening moments of the big bang and that relates gravity to the other forces of nature" How and why does this correspondence relate gravity to the other forces of nature?

I have got a theory, I kno I kno roast me in the comments for being stupid and low iq but, my weirdo science theory may inspire more theories that actually make sense So, my theory is that if a laser is repeated at the same place over and over in less than a thousandth of a second (I will explain later) then it might tear the fabric of the universe My idea is to arrange 4 mirrors in a way that light will go in a square pattern, there will be one 2 sided mirror with dark on one side and regular light on the other, so I will open one laser light from the see thru side of the mirror and keep it open until I place another mirror, not see through, over the see though…

I am quite confused... A cat cannot be alive and dead at the same time, essentially what Schrödinger was trying to prove.. A state can collapse without a conscious observer. How did so many people misinterpret his thought experiment? Or am I missing something here?

It seems like in University Physics textbook by Young and Freedman, the SE differential equation is not solved, The solution is only predicted and tested. Is it not possible to solve it?

Quantum Mechanics deals with the behavior of the most fundamental particles and has been one of the most successful theories in human history. The continuing development of a Quantum Periodic Table of Elements is so important to encourage discovery and improve education in all the sciences. I don't know about everyone else, but I have felt like that not enough has been done to create and promote a Periodic Table of Elements System that prioritizes fundamental quantitative data in the arrangement and nomenclature/numbering system. By far the most common and familiar is the Standard Periodic Table of Elements which places many Elements out of Order and severely limits the…

Where is the graviton expected to be located in the nucleus? I know that up and down quarks have a spin of ½, and the graviton's should be 2. Could it be inside the quarks? Or could it be an undetectable sphere around the nucleus as a whole?

In the double slit experiment, an interference pattern is created by individual photons travelling through both slits and interfering with themselves. The MWI proposes that the photon goes through both slits but as branches in different universes. These universes are separate and do not interact with each other. If these universes can’t interact with each other how can an interference pattern be created?

Is anyone actively experimenting with electrons in a vacuum? I have an idea for an experiment setup using electrons in a vacuum which I believe will reveal a lot and increase our understanding.

In general, a superposition of states is known through demonstration of interference between the two states: Refraction patterns, positive/negative interference and such. I want to know how it is done for more macroscopic scenarios. They put a macroscopic object (one visible to the naked eye) into superposition. It was a sliver of material suspended in some kind of field, and in superposition of vibrating (like a xylophone bar) and just sitting there. What test was performed on such a system that couldn't be used to determine which of the two states it was in, but nevertheless demonstrated (over the course of multiple iterations of course) a pattern different than …

When a person touches another person, do the atoms of the hand come into contact with the atoms of the skin of another person, or will there be a thin layer of air around all the objects that will impede the contact between the atoms of the hand and the atoms of the skin of another person? Or will almost all of the air be pushed out and there will be direct contact? thank