Quantum Theory

Hi! I'm Patrick, and I'm new to this forum. However, I'm studying Applied Natural Science in germany and at the moment I'm trying to recapture my knowledge about quantum physics and quantum theory. Well, since my QT lecture was in 3rd semester I can barely remember anything and I did not do a great job in understanding the mathematics behind the theory. Right now I'm trying to work through the lessons from lectures of the University of Oxford (I discovered they are offered in iTunes U for free) about QT. The lecturer does a great job in teaching the mathematic basics, but sometimes its not enough (for me...). At the moment I'm stuck at the following problem: …

What happens to the particles that black holes gobble up?? I realized that since the speed of light is constant, as it travels through space that is distorted by mass (planet's gravity, water) it APPEARS to slow down, but actually it is traveling at the same constant speed, only the funnel of space that is its passage is bent by mass and thus distorts its relative travel. This explains why a photon appears to move slowly through a massive substance, but retains its constant speed once it reenters the vacuum. Applying that logic to black holes was enjoyable. Since a black hole is essentially bending space to the point at which the singularity is space turn…

I'm trying to get to the bottom of things concerning the shaping of an optical pulse(change of state) with linear optics. Using linear optical apparatus we can shape the pulse of a photon in such methods as cavity dumping. You feed an optical cavity with near monochromatic(short bandwidth) input and allow no output. The light builds up and then you release all the light at once by opening up the cavity, and in the end you have an output with pulse length equal to the inner loop length of the cavity, even if the cavity loop is shorter than the coherence length of the input. So you can shorten the coherence length of the output which consequently widens the bandwidth. This …

We know Bohr orbit theory only meant only one electron of hydrogenic atoms .Suppose atom has two electronic ,If they all rotate around the nuclei ,due to the interaction between electronic ,by mechanical analysis ,We will find it difficult to find the right Orbits .Due to the repulsion between electronics,They may be in the nucleus next to rotate ,as shown in the figure .While attractiveness of nuclear electronic is F,but the contributions to the electronic spin orbit is only f.When calculating the orbit in Bohr's quantized conditions ,role of centripetal force on electrons is f rather than F.That is, when the atom has more than one electron ,Due to the repulsion between…

I'm working on a thought experiment and I have a question about trapping a pulse inside a looped preparation . If a pulsed particle beam is prepared with a definite energy(E), bandwidth(ΔE) and positional uncertainty/coherence length(Δx) is the pulse able to be trapped inside of a loop type preparation(a cavity) if the total length of the loop/cavity is shorter than the positional uncertainty of the particles. Typical cavities in optics all have open input and output ports. I'm talking specifically about a loop which is enabled by a switch which opens and closes the loop. A simple example in optics would use a polarizing beam splitter as the entry point of the loop, onl…

From an article that swansont had linked to. According to a common interpretation of quantum mechanics, both photons are in indeterminate states until you measure them. It is important to make this distinction: it’s not simply that you don’t know what the polarization of each photon is until you measure it; instead, the polarization does not take on a definite value until you measure it. So photons are value-less if not measured. 1) How do we know or prove that without measuring? 2) And if a photon is measured and therefore it's polarization is set, does it keep the same value regardless of how many observations are made on it from then on? 3) If eve…

In star-forming clouds, grains of 'dust' are: However, cold solid ices are normally chemically inert. So, to explain astro-chemical reactions, between spatially separated species of grain-bound, ice-locked astro-chemicals, researches have hypothesized, that: In the cold, rarified conditions, of star-forming clouds, could quasi-isolated dust grains -- "in space, the time between collisions can be weeks to years" (ibid.) -- be quantum mechanically "isolated", so that quantum phenomena, e.g. 'tunneling', might play important roles, in astro-chemical reactions ??

I heard that scientists took two entangled atoms and separated one, and shot a photon at 1 and it got destroyed at that end and teleported to the other end and came out of the other entangled particle. Is that true?

I might be disliked for this post... There may have been many discussions on this subject of what is the reasonable cause for these phenomena in the title, but I can't help think of ''great superfluous amounts of gravitational effects from Dark Matter (a strange class of particles),'' is a big jump to explaining extra gravitational effects. If I had been modelling an extension of the Standard Model, which these theories are hoping to do, I would have actually said it was a mixture or configuration even, of known phenomenon. In the case of Dark Matter atleast, surely the possible explanations could be: 1) Black Holes 2) Off-Shell Particles (because they exhibit…

I found this article and found it very interesting. My humble opinion is that it is better to have an axiomatic approach in science, but I don't know much about quantum theories. Is it true that the Standard Model use a "Babylonian" approach ? Does the maths in the article correct, or is it a word salad ? I would like to have your opinion and comment on that article. thanks

Dr.Young's double slit experiment. I am a 14 yr old teenager who is fascinated by Physics.I want to conduct the double slit experiment, I will require your help. 1)I want to conduct the experiment using electrons.(the one by Clauss Jonsson in 1961) 2)Will it be possible to use the electron guns of the old TFT monitors? 3)I am planning to show the experiment in a Science fair, So Can I show them the working or just the results? 4)The Experiment will be conducted in vacuum so What will be the vacuum container?Would glass work(Will light interfere with the electrons?) 5)Please add as much as details as possible as I have no help.The more the specific the better. 6)You…

I guess I know they have different 1 or the other, but I don't know how exactly.

are gravitons real. and can they really control gravity?

I keep coming back to the same brick wall on these matters, that prevents me from thinking beyond the initial value problem. Beginning with the Bohr Model, we have the attractive force between the nucleus and the electron. A stable orbit is achieved if the centrifugal force balances with this Coulombic attraction. Under wave-particle duality we have the need for harmonic orbitals. The length of the orbital must have a value of an integral number of the electrons wavelengths or it will interfere destructively with itself and the amplitude will decrease to zero. i) Do we ever observe non-harmonic orbiting? -- or -- Are non-harmonic orbitals never achieved? …

What happens if you have heavy electrons in a normal atom, or heavy neutrons n a nucleus, or different electrons in the same relative location?

If I take a singularity and in one second extend it to make a line length ©,then extend that line to create a square (c x c),then extend that square to make a cube (c x c x c).Can i then say that this space contains (c x c x c) metres of energy/sec.With the singularity at the centre.Each and every point co-ordinate has a potential negative tendency to return to singularity or a potential positive tendency to expand,or remain neutral.Giving rise to positive energy,neutral energy,negative energy.E = MC2.So I can have areas that have a greater mass of positive than negative,and areas with a greater mass of negative than positive,or neutral areas. Is my log…

So virtual particles are those force carriers that don't completely exist when traveling undetected, and then by detecting them, the consequences of detecting them cause measurement and real effects, but how does that actually work geometrically? Is there actually a single interaction point between a virtual particle and something it interacts with? What about when they interact with each other? Can they interfere with themselves and each other just as real particles do?

if u dont know i'll explain this test u take 1 photon and split it in half , the u put them in a barel witch on both sides has two holes- left and right we fire each photon on its side of the barrel and they both go through the same side of the hole ( for instance they both go through the right side ) .. we can repeat this a milion times and they always go through the same hole my question is how can they send information to each other if the photon is the one transfering information? pls explain

I think there is a confusion about causuality and correlation when it comes to whichway info. I cant beleive that in the 21 century there are people who beleive that the wave function collapses BECAUSE which way information was obtained as if the particles knew or cared about what we were doing. Instead there is a coincidental correlation that any physical measurment of any kind that reavels ww coincidentally collapses the wave function, not BECAUSE we obtain ww but because of the physical limitations of our universe.There is a mechanical interpretaion of Quantum physics and a magical one, no in-between (you can argue that we dont know everything about quantum p…

The search for a new theory which will acount for why mass appears in systems will be on it's way I predict. There are a few contending theories already, such as technocolor theory. What stops us from believing that potential energy is a contributor of mass to systems? The Higgs Field acts mathematically like a potential energy being added to a system. To understand this, one should realize that mass only appears in a system when the ground state oscillator moves away from the ground state as a flucuation in the Mexican Hat Potential in broken Galilean symmetry. The mathematical abstraction of this interaction is given by the Higgs Field [math]\phi[/math] and th…

Just as the topic title says sorry but I'm not great at science but some topics do interest me.

From the wonders of QM is the quick and relatively simple calculation of Assembly Systems with rigid formulas. But, restricted to large number of trials, for just one particle. Accuracy is proportional to number concerned (and Heisenberg Uncertainty Principle). But, failure and total failure in describing just one path of one particle. This is followed with the essence of QM's Incompleteness. And, as I can add, I have tried my best to unconsider this but it is impossible. Nevertheless, and away from the implementation of Schrodinger's, it derived the transitions between different states of atoms. An advice: when reading about QM be distinct and genera…

Hey! I am just wondering what was he trying to prove in this experiment? (Schrödinger's Cat) Thanks for any information!

The dictionary definition of energy isn't very helpful: "The ability to do work." As you get into what work is and what matter is, the definition becomes circular. It seems to mean something like, "Energy is the ability to make a change in energy." I am not expecting a better answer. I don't think anyone has one, but I still have questions about what we do know. Thermodynamics, rule one: Energy can neither be created nor destroyed. My understanding: The universe comes self-contained, and equipped with a large but finite amount of energy that makes everything, and causes all events. My question: How does primal energy divide to fill space? Is there one quanta at th…

I don't know if there has been an explanation for the Double Slit Experiment, but are there any theories as to why when it was observed it went back to being a particle pattern instead of a wave pattern? (note: I haven't done a lot of research on it, I've read a little and watched a few videos. I apologize if I'm not getting the concept correctly) Here's a link that helped me understand it the best: http://www.youtube.com/watch?v=tu57B1v0SzI