Quantum Theory

A particle (which in QFT is a wave travelling through a field) can only be measured at the beginning and the end of its journey. In between ,if it is measured then the journey is different .(shorter) If ,for a test particle where the initial conditions are identical(can that be guaranteed, I wonder?) and the particle is then measured at different times from its starting point do we get identical measurements? I mean ,if we have an observer on the Moon and we ,on the Earth** fire a particle with known attributes at them do we know precisely what their measurements will be ? And ,suppose an observer half way between Earth and Moon inter…

I think it was @joigus who may have pointed out recently that for an understanding of quantum effects one must rely on the mathematics rather than any physical demonstration.(or words to that effect?) Since,in my case it seems unlikely I will at any time soon gain such mathematical understandings could I ask instead maybe for a general description of what those mathematical tools were and how it came about that they were seen to be necessary to address the problem? Was it a gradual process of mathematical progress or were there one or two breakthrough moments ?

I'm sure this has been asked multiple times, but I couldn't easily find a answer. So in the double slit experiment, with steady source of emission through two slits, we see an interference pattern on the other side that suggests the emission is wave like as it passes the slits. The emission appears to acknowledge and pass through BOTH slits, while its waveform remains uncollapsed. What happens if the two slits are entangled such that when one slit is open the other is instantaneously closed, for each emission. Would the entanglement of the slits cause the waveform of the emission to collapse, or would the waveform cause the slits to decohere? How would a par…

I am learning that Hilbert space is .very central to QM. Does that mean that every aspect (,or attribute?) of a quantum system (I think one has to use the term "system" rather than "object") exists in something like it's own dimension?

What happens when one of 2 people shoots an electron through a double slit and the other watches where it lands?

Do material objects and beings in the macro world exist in a state of probability and only come into existence when observed?

Hey, so recently I've seen a video about Quantum Locking and I was wondering if it would be possible to maybe make a hyperloop that's made out of Superconducters and magnets and a long distance tunnel (10000km for example) which has vacuum inside of it so that when the superconductors get cool they stay so. So basically a new revolutionary mode of transport that's even faster the planes. And also it's very efficient (if it's makeable) because it can go as fast as you want for infinite time and you only need energy when pushing it and stopping it. The only thing that you mustn't forget is the g force so yeah, my question is if it's possible to build a quantum locking Hyper…

Just this question.

[This](https://youtu.be/9l6VPpDublg) is a lecture by Persinger where he postulates that photon entanglements and the Earth's magnetic field can facilitate telepathy. (See from 20:00 to 30:00) Links to the study he cited: http://neurosciarchive.byethost12.c...ween-physically-and-sensory-isolated-pair.pdf My questions for you:- • If you are ready to smack this as woo and nonsense, then could you provide some counter arguements? •Since teleportation of photons has finally been achieved in 2017, do these point towards indirect proof for his postulating? • Finally is the no communication theorem/no cloning…

why is general relativity not compatible with quantum mechanics?. can they ever be compatible?.

Let's take a pair of entangled electrons in the state |ud>-|du>. If the first electron measures up, the second is down, and vice versa. Let's keep one electron on Earth and let's send another one, very carefully, to a planet far away, say in the M87 galaxy. They are still entangled, so if the first electron is up the second is down... But what are the directions 'up' and 'down' on that planet? How do they relate to the direction of the measurement here on Earth?

https://phys.org/news/2022-03-physicists-compressible-optical-quantum-gas.html Researchers at the University of Bonn have created a gas of light particles that can be extremely compressed. Their results confirm the predictions of central theories of quantum physics. The findings could also point the way to new types of sensors that can measure minute forces. The study is published in the journal Science. If you plug the outlet of an air pump with your finger, you can still push its piston down. The reason: Gases are fairly easy to compress—unlike liquids, for example. If the pump contained water instead of air, it would be essentially impossible to move the pist…

In the article by E. Majorana "Oriented atoms in a variable magnetic field", in particular, it's considered (and solved) the problem of describing a state with spin J using 2J points on the Bloch sphere. That is, if the general state of the spin system , (1) then, according to the article, those 2J points in on the Bloch sphere are described by the following complex numbers (): . (2) Here - is the angle between the unit vector and the Z axis, - is the angle between the projection of the given vector (on the XY plane) with the X axis (Bloch spheres), - are t…

Hello, Im just trying to invent how to make Helium-3 from O2. This is my first prototype of nuclear reaction: 16O8---Nr--->12O5---t 1/2--->12C6---Nr--->8C2---t 1/2--->6Be2---Nr--->5Be1---t 1/2--->4Li1---t 1/2--->3He1 Up index - isotope number Down index - neutron number Nr - neutron radiation (detaches neutrons from core) t 1/2 - Half-Time Opinions ?

Is there any update on the Double Slit Experiment, or are scientists still scratching their heads? There are plenty of youtube vids which call it "inexplicable" because the photons seem to change their behaviour as if they know they're being watched. One scientist said "It's as though we're not allowed to know", implying there are unseen forces in the universe.

If Swansont had not locked the topic you would have received the coordinates. Now one reality replaces another. And I went from a positive reputations to a..not so nice rep.

Hey in the following paper there are some equations relating to a strange attractor , the equations i cannot seem to find anywhere else. My question is whether these equations make sense whatsoever? In section 3 there are some equations regarding a 'strange attractor' . Do those equations make any sense whatsoever

Theory of the propagation of a light Beam and it's Impact: Roger Dynamic Motion replied to Motion's topic in Speculations in the Science Forum : First; I have to point out: ''THE BEAN OF LIGHT'' has two functions , the light wave and the shock wave . To the best of my understanding, the shock wave from the beam arise from the expansion of the source'' the tungsten'' ,compressing space, creating its own gravitational field, to impact on matter, the same way the presence of the Earth has created it own gravitational field witch is inversely proportional to its sises and com…

I've just started reading this book (2016). Feels very refreshing and promising. Are you familiar with it? What do you think?

Quick question; is "anti-quantum" a concept in mainstream physics? I got curious since it was mentioned in another (now closed) thread and I can't remember seeing it in my brief studies of the topic and I'm unable to find references to "anti-quantum" in physics. My guess is that the term was invented as part of a non-mainstream speculation, hopefully someone could confirm or link to some material. Side note: I'm aware of "anti-quantum" in the context of computer science and cryptography. The term refers to "quantum-proof", "quantum-safe" or "quantum-resistant"; algorithms that are thought to be secure against a cryptanalytic attack by a sufficiently powerful…

I have one request, I hope you could answer it…. I saw this article that makes heavy assumptions based on Quantum Electrodynamics , like something like formation of an energy domain or such, and it connects it with brain activity which is super weird, I did ask a neuroscientist and he said he couldn’t make any sense with the physics part of it because the author delves into parts of physics which I’ve not heard off such as Energy Quanta-Gradients and stuff like that, and to me it seems pretty pseudosciencey as it is published in a non peer review Journal, however if you don’t mind you could please point out some of this mistakes(if any) this author makes on the QED theor…

in classical physics, when a charged particle oscillates, it emits an electromagnetic wave, and the frequency of the wave depends on the frequency with which the particle oscillates. But in quantum physics, when an excited atom emits a photon, the energy of the photon depends on the magnitude of the quantum leaps that the emitting electron makes (if it jumps one level, the photon will have a certain energy; if it jumps two, a greater energy, and so on). So the frequency of the electromagnetic wave that corresponds to the photon will depend on the amplitude of the quantum leaps made by the electron. I don't understand why these two cases are so different. In analogy wi…

Hi everyone, as part of a series on making accessible Quantum Mechanics I covered the famous Double Slit experiment, and how “observation” changes the physical behaviour of fundamental particles. It's my all-time favourite experiment in quantum physics, hope it’s of interest! url deleted

So I saw this paper by Arturo tozzi https://www.researchgate.net/publication/297679077_Towards_a_Neuronal_Gauge_Theory So I wanted to know how much this arturo contributed to his work? So I saw papers he has written on the same but hen I saw he abuses self citation, from a paper on 94 citation he has 84 or 87 being self. Sane with most of his other papers. However the one I linked above has about 50 odd self citations but he has contributed to the paper with other authors so that's what I was confused about. Whether the guy really has any expertise in the field he is commenting in?

There are top physicists that have great ideas to progress scientific progress but are held back by the very top. The very top physicists choose to continuously pursue established but old theories mainly to their own benefit. Only when they die off will a whole new generation of physicists take over and pursue new ideas. In other words, the direction and pace of human evolution is controlled by very few people with a personal agenda.