Quantum Theory

for the longest time i have always wondered how close we are. dose any one else know what i mean.

Consider this alternate form of the double-slit experiment: Instead of one photon emitter firing single photons (one after the other) at two slits, suppose you had two photon emitters, one direct at each slit. In other words, the photons emitted by each one go directly to their corresponding slit, and only get the opportunity to interfere with the other after they've passed through the slits (and you have them setup to fire photons at exactly the same time). What will happen? 1) Will an interference pattern emerge, just like in the single emitter case? 2) Assuming the answer to 1) is "yes", when the photon finally hits the screen and collapses into a point…

I`v had an idea but 1`st I`d like to know a few things before I formulate any further. it involves Anti-matter, and I`d like to have a few Simple answers. do Antimatter particles Only react with an identical counter particle IE/ Positron meets Electron? or will it interact with ANY matter? IE/ Anti-proton meets an electron or neutron, or Positron meets a proton or neutron?

Fusion is when two nucleouses collide to form a new element, almost like what was attempted with alchemy. it requires extrem pressure and heat to do so, which is why our only self sustaining form is the sun. now, it prouduces a lot of energy and would be great as a fuel source. w are trying to do this now, but why is it so hard?

Okay, Hawking suggested that black holes disappear due to the fact that because the Uncertainty Principle states that the more accurately we know how fast something is, the less so we know where it is. Applying that to black holes, and empty space, Hawkings stated that the spaces right outside the event horizon was full of "+" and "-" stuff forming then being destroyed on each other. Occasionally, however, the "-" stuff that goes into the black hole causes it lose mass because - energy is essentially - mass. Now, here's my question, wouldn't the + particle have just as great a chance of falling into the black hole as the - one? So why would a black hole decrease in s…

I think I am confused, what and how can you define something that is a constant and or nature of QM? How do you know if any property is anything that could be an intrinsic constant or nature of quantum mechanics? For instance wave particle duality seems to be the nature of anything quantum, but this is purely by measurement, meaning environment had to exist or can exist, else I would think you are saying absolutely no difference between observable and observer could exist or that a measurement could even take place, which I think then also describes then that any quantum system has constants and or a nature, like entanglement. I also think to answer this question …

An interpretation about space and time in quantum mechanics There was a repeated experiment where at first, two protons are joined and of opposite spins. Then, the second is taken far away, and it is acted upon the first to modify its spin. The second proton will change its spin to keep it the opposite of the spin of the first. For further details : http://mist.npl.washington.edu/npl/int_rep/tiqm/TI_24.html#2.4.1 Now, if you will assume with me that we can apply the set theory ZFU to physical space, U (urelements)) being physical space, you will see that we get an interpretation of the experiment. Indeed, as it is not possible to define a usual dist…

About space in quantum mechanics We apply set theory with urelements ZFU to physical space, we consider locations as urelements, elements of U (non sets). Ui is a subset of U with number of elements n. XiUi is the infinite cartesian product and a set of paths. Let us consider the set of paths of all elementary particles-locations which number is n. If n is greater than m in CC(2through m), countable choice for k elements sets k=2 through m, the set of paths will be the void set. So, physical space would become void, the universe would collapse and a Big Crunch would happen. But the matter would have to go somewhere and indeed the Big Bang happened. So, n …

Can anybody please answer 3 questions realted to MWI: i)Suppose I measure anything, then I will also be divided into two different universes according to the no. of probable things. But I don't feel any change. I think everything is going continous. But if it really divides where does 'I' go. I don't feel any change. What thing my mind thinks? Where does that previous 'I' go? ii)Suppose there's a match between India and Pakistan going on. There will be many events in the match and hence too many universes will be created. But the result will be either India wins or Pakistan wins. So, different results will happen in different (too many) universes. So, I think all the un…

Ok I don’t really know how to frame this question all to well so if someone is confused feel free to state that and I will try to assist. So on an subatomic level you have a certain amount of uncertainty, now I know in a traditional sense this is to apply strictly to say orbitals really in trying to determine both position and momentum correct? Well my question I guess at this point would be purely metaphysical if even that. How do we know that uncertainty only applies to that? I mean if time for whatever that is, an example is some calling it entropy, how do we know uncertainty and time do not have any kind of a relationship. I mean even if this relationship is "…

Some other threads make me pose another question... In the introductory courses of classical analytical mechanics, the classical action principles where to my experience argued by showing that they yield equivalent solutions to the ordinary newtons mechanics. So they are in a sense nothing new, just a sort of reformulation, whose main justification is the agreement with the standard newtons equations of motion. Still it is intuitively appealing, beatiful approach that appeals to variational principles and ideas that seem very intuitive such that "nature chooses the quickest path", giving the student the impression that there is after all something deeper hear…

Just in case anyone thinks my rants about a problem with our 'view' of information are out the window, heres something I found about quantum superposition used measure of information content: He is talking about the informational "potential" of entanglement, and he seems to be saying there might be a (mathematical) problem... This guy is saying we need to redefine a certain "well-understood" principle -which incidentally projects straight to 'classical' information. And some questions (I know everyone just loves questions...): Maybe he thinks there are some problems with our current definitions of things, like, certain information...

hi Everyone, Actually i just wanted to tell you about the video that i had seen in one of the blogs. And that blog features about the videos of the quantum. i Liked it very much. The site goes http://www.physicsvideo.blogspot.com i guess it would help one picture some details on quantum mechanic.

My understanding of the phenomenon of quantum tunneling is that a particle surrounded by a barrier may be detected outside that barrier due to the fact that its wavefunction spans across the barrier (i.e. there's a small portion of the particle's wave that reaches beyond the barrier). Therefore, there's a small chance the particle will be found outside the barrier when measured. What I don't understand is why some physicists feel this has to be accounted for by the particle "borrowing" energy from a parallel universe. As I see it, the idea that a particle exists as a probability wave means that we don't need any sort of energy-borrowing account. I can see that we woul…

I was just wondering if any one could explain me why is the sunlight called the electromagnetic wave. if quantum theory could explain i did not fine any of the site. my friend suggested me this sitehttp://www.physics-physicsdiscussion.blogspot.com Is it informative, i could not judge

Could some of you please outline Quantum theory for me. Everything i find on the internet is to complex and in depth for my understanding. I'm only 15 but i want to understand so i can actually make sense of more complex explanations. (Don't flame me, its an innocent question) Thanks qwe)k

I was wondering if anyone could point me in the right direction for any of these questions... Show that the wavefunction for the 1s electron orbital for the hydrogen atom is a solution of the 3-D Schrodinger equation. What is teh total energy eigenvalue for this wavefunction? The bond vibrational energy levels for the 1H35Cl molecule can be described by Morse Potential with De=7.41E-19 J. The force constant k=516.3 N/m and frequency=8.97E13 1/s a) Calculate the lowest four energy levels using the Morse potential. b) Calculate the fundamental frequency associated with teh n=0 --> n=1 transition and the frequencies of the first three overtone vibrations…

In this week's NewScientist (3rd Nov.) There is an article titled "quantum untanglement", by one Mark Buchanan. (not, I believe the same person who comes up as a Baptist minister!). He appears to be a phd and sometime editor of this magazine and Nature. I can provide no links, because it requires a subscription which I do not have. The reason I hesitantly bring this up, is that my knowledge of the way things are, and the way they might be in the future, is through such "popular Science" articles. They feed my curiousity and fuel my imagination in an easy to assimilate maths-lite way. (As of course do also many of the threads in this august forum;) ). I hope th…

Does anyone know where I can find integral tables for QM? I tried a few, but they cannot be solved as indefinite integrals that give rise to noninfinite quantities. Example: [math] r=\int_{0}^{\infty} (&\X\Psi*(x))(&\X\Psi(x))*4*&\X\pi*r^2*dr [/math] <r>=(integral, 0 to infinity) (psi(x))*(psi*(x))dr Using integration by parts gives a solution that goes to infinity. Can anyone help me find some tables? Thanks, Clark

THE TWO-SLIT EXPERIMENT WITH ELECTRONS (Experiment DS – e – 727 – 0,1 – 2) The two-slit experiment with electrons (Experiment DS – e – 727 – 0,1 – 2) is described below: Electrons moving at a velocity V = 727 cm/sec (that is, λ = 0,01 cm according to L. de Broglie law), pass through two slits S1 and S2 of width d = 10λ, namely d = 0,1 cm (d = 1 mm). Slits S1 and S2, lie at a distance b = 2 cm from one another. Also, distance between slits S1,S2 and screen S is L = 100cm. Thus, in this case, (if Quantum Mechanics truly applies) the electrons passing through the two slits S1 and S2 should form on screen S bright fringes (electron concentration) and dark…

What constitutes observation in Quantum mechanics? For instance, does the capture and measurement of the byproducts of decay count as observing the original particle? Can virtual particles observe an object? Ie, if a particle passes through a field is it observed? What if its field influence is measured? Thanks

Could a black hole be either one of the two things I will describe. The first is that a black hole could possibly be something other then a “true” entity like a star or an organism. What I mean is like a vortices or a whirlpool. That its something coming about as a byproduct of galactic function when it reaches a high enough threshold in certain variables. The second guess I would like to toss out there is that how a photon might be labeled as in to what energy range in falls in, you can do this somewhat with elements. So in reality of how nucleosynthesis works in producing basically more complex states of energy and mass(is that correct?) to say a neutron star co…

What frequencies are above gamma rays and what are they called? Also what is below radio waves on the spectrum, and what is it called? Does the photon move in straight lines or the wavey pattern going up and down? When you shut off a light's power source, do the photons keep moving or do they stop immediately? For example you have a real big intergalactic flashlight that is projecting light for well over a year. Then all of a sudden you turn it off. Will the photons that have traveled a light-year stop instantly or will they keep going?

Electrons, being fundamental particles, have spin and wavelength. They are “matter waves”. We know that things, objects, can move “left” and then “right”, and we know they can't or don't move “left and right”. This seems some impossible trick this humble particle that has brightened our lives for a century, blithely does despite our insistence. Why do these “quantised” entities jump through such implausible quantum hoops? What are they doing that we don't or can't (perhaps ever) see?

What does the "local" part of local hidden variables mean? Does it mean local to the thing you're measuring or does it mean "having a location"? Or does it means something else entirely?