So, apparently the scientists managed to succesfully teleport the states of the qubits, but fuck me, i have only very very misty idea, what that means and no idea, what are the implications of this discovery...
heres the link:
http://www.engadget.com/2011/04/18/first-light-wave-quantum-teleportation-achieved-opens-door-to-u/#disqus_thread
can somebody in laymans terms explain what happened and what it means for the future? Did they basically dicovered the Heisenbergs compensator from Star Trek?
Okay.. So what exactly is the weak force then... I've never heard of it as the one that converts quarks... I have actually heard before that the electromagnetic force and weak force were unified, though I've never really understood why... I mean, does it mean that if the electrical field is in the y axis, the magnetic is in the x and weak is y or is it something completely different? I honestly have no idea...
Also, is there a generally accepted explanation as to what keeps matter from just flat out decaying into energy? Yes, you can say that a proton is a stable particle, but why? On a related note, to my knowledge, when you have mass annihilation, the only result is a really really high energy photon. Since the particles beforehand had influences over more than just the electromagnetic force, what happens to the strong force? I guess you could pass off the weak's off on the electro-weak unification and gravity doesn't really change because while the photons don't have rest mass, they still distort space... So where does the influence of the strong force go, or is this a stupid and irrelevant question? "Force conservation" for lack of a better term seems like something that would make sense, though I've never actually heard anyone mention it...
I suppose one solution is that the energy from the strong force simply gets converted, another is that the photon retains it (which would cause all sorts of funky reactions when that photon hits pretty much anything), and the other I guess is that the dying particles spew off some gluons before annihilating.
The electro-weak force arises when the higgs field is such that there is no difference in mass between the photon, W, and Z bosons.
yeah, so that's pretty much all the weak force does is transmute quarks into other quarks. The prime example is beta decay, which is a kind of radiation. This in turn causes isotopes to break down (for example, the well known carbon-14 half-life of 5730 years). The weak force is mediated by 3 bosons (boson = force carrier): W+, W-, and Z0. The W's handle beta decay, while the Z0 causes the neutral current phenomena (predicted by the electro-weak theory). This is a small interaction between electrons and neutrinos.
As far as all matter decaying into energy... I think you're mis-interpreting 'energy'. Energy is actually non-physical. What is meant is that if you look at something, there is a number that you can count. if you then look at it later, after some kind of change has occurred, you will find the same number. So, in a way, E=mc^2 is just a definition of this number in terms of mass. The other way to think about it is a conversion rate between different amounts of mass. Since everything is particles when you get right down to it, the energy of all known forces are wrapped up in particles. Now, there are a few caveats to looking at energy this way. For example, kinetic energy increases as the velocity increases. Also, the mass increases due to relativistic effects (eventually, every attempt to increase the speed results in an increase in mass).
So, matter will always stay together as matter. As for why it doesnt always decay into other matter... theres not really an answer for that either. I can tell you that the time dilation predicted by relativity can extend the life of particles far beyond their otherwise brief lifes. Another way to look at it is that nothing is really stable, its all just ripples in the quantum foam.
Mass annihilation.... you mean matter-antimatter annihilation? theres actually 2 gamma rays (yes, photons) emitted.
I have no clue what you mean here. I'll take a stab in the dark with some facts about the strong force:
One proposal as to why gravity is weak relative to other forces is that it "leaks" through the brane of our universe and into another or even might be leaking from another universe into ours.
Not necessarily the direct answer to my questions, but its enough to figure it out.. Thanks by the way. The only question I have from that is what exactly is pair production?
One unrelated question but one that has bugged me incessantly is interference with photons... If you have two point sources emitting a specific frequency of light, you can end up with one or more black bands on a wall a set distance from the points due to the photons acting as waves which cancel due to the crests and troughs overlapping. In that regard, it makes sense. From the point of energy conservation, if it went black, does that mean that all that energy just got transferred to thermal energy or did it go somewhere else? You can't delete energy, so destructive interference with light doesn't really make sense... I asked my physics teacher in high school the same question when he told us about them in the first place. He had no answer.
Been reading on parity violation and saw something i forgot to mention: neutrinos always spin to the left. I should clarify here because theres a few words there used in funny ways: 'spin' is not actual physical rotation. but it does contain angular momentum (it breaks down into descrete pieces). Now, left-hand spin means the dierction of spin is oposite the direction of motion. So, neutrintos always spin opposite the direction of motion. this is not very intuitive, but not super profound. However, there is a particle called the Kaon. It decays into 3 pions. Except when it decays into 2 pions. That is profound.
It should be meantioned that this is a possible reason for our universe not having much, if any, antimatter. The big bang should have created equal amounts of matter and antimatter. for some reason, we only have matter now. So, there must have been some mechanism that acted more strongly with matter than antimatter, or vice versa, to lead us to our current configuration. The weak interaction shows the most promise for illuminating this mechanism, and it one of the primary reasons th LHC is making antiatoms: to see if there's a difference
Here'ssomething for you...and found after my comment about the possible nature of particles (I'm so ahead of my time). http://www.sciencedaily.com/releases/2011/08/110810215342.htm
As I said, I wasn't sure what you were asking. Pair production is basically similar to the virtual particle process, only there's real particles mixed up in it. What they mean is that if you were to split the quarks apart from each other, there would be enough energy to make some virtual particle pairs into real particles. These are energetic enough to then decay into other particles, creating a shower of different particles. In this way, many particles are 'produced', starting with a 'pair' of virtual particles. I might have a few details wrong here because its so close to virtual particles, but that is essentially how it goes.
Your question on photons probably stems from looking at quantum mechanics from that perspective. There are a few different ways of looking at quantum mechanics, some ways have advantages, but they are all equivalent. In this instance, you should think of light as made up of particles, and not wave-like at all. The path the particle takes is every possible path to the point where it is found... simultaneously. It goes through the Andromeda galaxy to arrive on your wall. Yes, this violates relativity. Forget that when looking at it from this perspective. Now, there are probabilities you can assign to each possible path. This is basically the probability of finding the photon at that spot. It's the probabilities that are interfering, not the photons themselves. Why? well, the greatest contributing paths are very close to the 'classical' straight line path, but you have to take into account the fact that the photon could have coupled with some virtual electrons along the way. When there are two light sources, this coupling with virtual pairs builds up the probability of finding the photon along new particular paths, and decreases the probability of finding the photon along others, creating alternating bands of light and dark.
Of course, if you meant "what causes dark?", that is simply the lack of light.
That's about the vaguest article I've read on that site in a long time. Hawking made his theory about black hole evaportation along time ago, which has been tied to information theory numerous times, including Hawking himself. So, whats new about this theory? Nothing so far. Theres a claim in there about space and time being emergent properties, but no explaination as to why or how. What the heck is the point of writing a news article when you dont include any kind of 'news' in it? Maybe the article is an attempt to disprove itself? information goes in and never comes out?
Physics!
Now with 50% more Higgs!
Also, I found a slightly better article about the same paper you referred to above
Edit: So, the slightly better article says the 'news' is just that the authors might have found a better proof of conservation of information that doesn't skirt the infinite value in the past issue. But the article also claims it lends credence to this theory, which is the theory mentioned that space and gravity are emergent properties. I havent read it yet, but I will.
Okay, so i went through most of that theory I linked. It is based on the holographic principle which says that our universe could have less dimensions than we think. The paper derives newton's gravity and einstein's equations through the assumption this principle is true.
There are several things I am dubious about, but I would first like to point out my own flaws: I am not a physicist, teacher, or anything like that. I also do not have much experience with the holographic principle. Everything else, I have some experience in, but the paper is obviously fairly technical and there are parts I'm sure I understood incorrectly.
The paper seems to use alot of classical theory, and that bugs me. We know classical theory is wrong. In particular, F=ma is derived and the author seems to think this is important. To me, it signifies a mistake. Another example in this regard is the use of entropy/statistical mechanics. While these laws are true on certain scales, they do not hold on the quantum scale (one can argue that they hold some of the time, but that is not enough to make it true). The use of black hole entropy equations to derive newton's gravity is particularly hairy for me, as I would guess that newton's gravity might have been used to help construct the black hole entropy equations; Although, to be fair, I am not sure.
There is a part about coarse graining, which seems to indicate that the 'emergent' properties advertised wont always emerge, depending on the scale you examine it at. This would obviously invalidate my above objections. However, the 'microscopic-world' (as he puts it. Please do not confuse this with our world's small scale) is what is generating the 'macroscopic-world' in a holographic universe. The author does not go into how the macroscopic world is created, which is clearly stipulated at the begining (it is just assumed); how then can you seperate it from other scales via coarse graining if you have no idea of the mechanism?
Don't get me wrong, there are some interesting points, and if it holds up to better minds than I, will be a major reference for holographic principle papers that deal with classical mechanics.
Good reply. You are more advanced than I in detail. I am am mathematically retarded enough not to think I am a physicist so I suffer no delusions
I read the firs tlong paper on the "holographic universe" idea and it is hard to get your head around. This is an emergent theory and not a "fact" at all. I think that most of our current theories will suffer the same fate as string theory...brilliant insights, nuggets of truth, advancement in understanding but then all in error in some way or another.
The idea though that one day black holes might conceivably be tapped for the quantum data they contain is really fascinating though.
Ironically, what they present in many is "life is but a dream". Sounds like philosophy to me!
Thanks. I thought that too (the math=difficult part). I am driven enough to find out for sure. I went through the first rabbit hole to find its all rather easy, but there are more rabbit holes than I ever knew about.
It's pretty simple, actually. The idea comes from an interesting fact about the black hole information theory: the information contained in a black hole is proportional to it's surface area, not it's volume. So, you could argue that the information is really 2-dimensional at that point. The holographic universe idea is the reverse: if you can take information from a 3-dimensional world and completely represent it in 2-dimensions, it might be possible that the 2-dimensional world is more fundamental and the 3rd dimension is an illusion (like a hologram). This can be extrapolated back to 1-dimension and the appeal of this theory is that string theory calls for extra dimensions, so there might be a way to make those 'extra' dimensions illusions as well.
However, I fall back to an opinion I've had for awhile: What, exactly, is a dimension? I don't think we have that figured out. For example, could spin be a dimension? Currently, it's a matter of definition that the answer is no. I think there could be many forms for dimensions as currently time and space seem so very different, but are both considered dimensions.
That's my point to absolutests on all sides of the fence as well...we really don't know what "dimensions" and even universes really are and all our theories are akin to trying to solve a Rubik's cube. Just because you get two or three or even four or five blocks in a row in order doesn't mean you are guaranteed to be going the right way.
I think we are going to have to redefine how we have seen things several times before we even get close to really detailed explanations.
As to the two dimensional being the core of reality for us, it may be somewhere in the two-dimensional realm they see one dimension as the core reality. We can't even comprehend what it would mean to exist in another dimension so its hard to speculate that what we see from ours provides the answers for all the others as well.
Considering what I said above, I love the dialogue from the Satan Pit episode of Doctor Who...
The Doctor: [pause] How did you end up on this rock? The Beast: The Disciples of the Light rose up against me and chained me in the pit for all eternity. The Doctor: When was this? The Beast: Before time. The Doctor: What does "Before time" mean? The Beast: Before time and light and space and matter. Before the cataclysm. Before this universe was created. The Doctor: That's impossible. No life could have existed back then. The Beast: Is that your religion?
The Doctor goes on with a pause and says "...well, it's a belief." That's mostly where we are at in the present.
Yeah... Our universe and it's dimensions really is I suppose one of the ultimate questions of existence... Things like this make me crave so very much the "operating system" of the universe... Beyond our universe, beyond all existence, what is? If you could look on all existence as a bubble, though impossible for a human or anyone from the "inside," what would be there? Outside of time and space, outside of existence, what is?
I've felt for a few years now that time itself just seems the most convoluted and illusory thing about the universe itself. If in "reality" beyond existence, time does not exist and that it is only local to us and out universe/multiverse/existence, things we don't understand about the universe do tend to fall into place.
I know there's no real way to test it. I know its theoretical and whatnot, but if our universe is simply a "virtual" representation in some other realm or what have you where time as we know it does not exist, things would seem to make sense...
On a potentially more testable note, if you were going with the holographic thing, I'd say that if you were to compress all information down to one dimension, that dimension would have to be time. Of course, if there is a different "master" dimension, it's probably only at the quantum level, something that governs the quantum foam itself.
I've lived and explored long enough to first hand realize there is more than what we just see. What's astounding to me is the absolute rigidity of quite a number of intelligent people to balk at genuinely examining any concepts that point this way.
I don't mean to at all turn this in a religious or spiritual direction (as was not my intent in the Doctor Who reference above either) but I laughed out loud when Steven Hawking blithely announced that random chance and gravity were sufficient to explain everything. At the same time, concepts that there could be an actual "Creator" or other intelligences that may have interacted with mankind during his existence are "absurd fairy tales". Who knows what's possible here and now or what isn't?
So its stated infinite universes produce infinite chances that anything is possible...which is then followed by a white (or black) list of what actually is or isn't "really" possible.
The reason I love this area of science is it is willing to look at things that are difficult or impossible to prove at present and that oftentimes fly in the face of other established science but without simply dismissing them with little or no examination.
I think the universe is wheels within wheels and the deeper you dig, the deeper it goes. It takes almost a childlike innocence to be a scientist in these areas. Pretty cool.
What bothers me is people who listen to half of what science is telling us. Random chance and gravity are sufficient to explain everything. Sure, there are some details not worked out, but we have enough in our current theories to generally explain it all.
People take the robustness of science and the wierdness of the world and say, "anything is possible". This can be taken 2 ways. Sure, its optimistic, dreamy, and a motivating viewpoint. I would never want to take that away from someone, unless holding that view took away from the world.
The other way to take that is: since anything is possible, we dont know anything. There is some truth in this, such that we base our ideas about how 'A' works off our ideas of 'B', which we might only vaguely understand. The problem I see here, though, is that the scientific method brought us to this point, here, today, with such a vast understanding of the world. That knowledge can't just be written off because there is some detail that might make our views change 100 years from now. That's insulting to those that contributed to our current understanding, to say the least.
And finally, 'anything is possible' is not what science says about the world. That is just the common man's interpretation of it after being exposed to some of the implications science demonstrates. The way science works is: you start with 'anything is possible' and then eliminate the things that are not possible. Later on, you might find out there was an assumption that shouldn't have been made, which add new possibilities and resurrects old ones. And the real world clearly is not one in which everything is possible. If it were, there couldnt be anything, as it would all mix together.
...*sigh* I've heard this from alot of people. They often change their minds about it every week, which is almost a counter-argument in and of itself. On our scale, time is an illusion. At least the way we percieve it to work is not how it actually works. Its all about statistics and the way atoms and molecules tend to behave after a period of time. Fundamentally, time does exist, though. It is the measure of change. Things could not change if there was no time. For example, Muons (a particle that is like a heavy electron) decay into other particles after a period of time. If there was no time, or if it were an illusion, how could it decay? Furthermore, it is consistent (there really are statistics involved, which I will ignore, due to quantum mechanics): the muon decays after X seconds. This can be changed depending on how fast it is moving due to relativistic effects, which reduce the muon's motion through time as it moves faster through space. This is also very consistent and I invite you to explain it without time. Quantum mechanics is built off of periodic relationships, which adds alot of evidence for time.
I might be bending your analogy a bit, but analogies always break apart fairly quickly: 2 dice cast do, affect the final sum of the 2, this is true. But we aren't looking at the final sum. It's like asking one of the dies what the total of all dice, everywhere is. We really only care about how our dice rolls and settles on certain values.
I appreciate that you think there is some interconnectedness. You think (not to put words in your mouth) that it might work like rolling a 20-sided die to determine what size die to roll next. And thats plausible. The only thing that matters, though, is our ability to work out the mechanics of rolling each size dice whether its 1, 15, 20, or anywhere inbetween. You might also think it works like a giant loop where one roll determines what size/how many dice you roll next time, which determines what you should roll the first time. And that type of thinking will get you nowhere fast. Our brains are wired to think in a causality based world, and understanding the mechanics of 'laws'/logic require you to abandon causality. Why? Because it's the main thing that you would be trying to explain. I could go on, but I get to leave work now and I'm veering away from my point.
Edit: Kinda felt I should conclude or something
So in the end, there may be more, but it might not matter. Take Sins for example. We all 'know' how shield mitigation works. There is some question as to when certain parts of the mechanic take effect (unless someone figured that out, idk), but we all understand that it reduces damage and the reduction increases the more the ship takes damage, up to a maximum level. However, I'd like to ask you this: what is the exact lines of code? No one but the developers know that.
My point is we might not be able to comprehend the 'code', but we can understand the mechanic. Do we really need to see the code? I'm all for trying, but just because you can insert a nail with a screw driver doesnt mean thats the best way to do it for us.
As far as I can imagine, we are incapable of describing anything that doesn't produce causality in our universe. So it is pointless to try to "imagine the unknowable" But a more subtle and applicable point that is more relevant to me is that searching for evidence within causality of things that originate from extra-universal processes might be a very worthwhile thing indeed. It is undoubted true that we lack the ability to "see beyond our own bandwidth" but it may be very possible to use reactions within our bandwidth to describe and even use things we can't see--even things originating or residing in other types of space.
I think being able to grasp even only a very few things from "elsewhere" could change everything and who's to say that a discovery in one realm might not allow discoveries of even more "impossible things"? It may not prove true and hence not be so important or it may be the most important thing we ever find. Perhaps an escape from entropy, ftl travel or limitless power.
I certainty wouldn't drop practical research to pursue the fringes of understanding but I would never neglect them either. one breakthrough that allows observation or interaction with unknown universes or dimensions could change the entire future of mankind and perhaps even the universe.
Besides, it's the only way I'm getting a TARDIS of my own and I really want one. I also am always thinking of the scifi applications--a lot of unwritten and unexpressed scifi concepts lay in this area. One day,thousands of years in the future, they will find the archives of this thread and be astounded that I was so visionary.
Well, instead of teleportation, can we use entanglement for simple wireless energy transfer? As for example, lets take a electrical wire and cut it into two pieces. Charge both positively and then neutralize them with entangled electrons especially at the open ends. Now, if we put on AC electric current on one wire, does that will flow in the other?
So far, quantum entanglement means destruction of one phase of one entangled particle means rise of that phase in the paired entangled particle. We all know that when electricity flows through conductors, phase of free electrons occur. Now, I am curious to know whether "entangled free electrons" can carry electric current between two not connected conducting wires.
This is just a thought and I put it here for discussion only.
At present, it takes more energy to entangle them--but if we get to the point where we can literally just send information already stored (like a binary file)--then we might be onto something.
That is not entanglement. Doing something to one, does not change the other. However, it can 'collapse the wave function' of both. An analogy: you and I each recieve a key and go seperate ways in a large building of locked doors. At first, both keys are in a limbo state that you might call a 'skeleton key', as it matches all doors in the building. Now, you go to open a door by inserting the key, and this causes the 'limbo' state to disappear and decide which door, of all the possible doors it can open. This will mean my key does the same thing, even if I'm not attempting to open any doors at this time, and no matter where I am in the building. But from this point forward, each key is no longer linked to each other in anyway. If you open another door, it does nothing to my key. If I file down my key so that it works in some other door, yours is unaffected. This is roughly what is going on with entanglement. The doors are measurements, the keys are particles, and the keys losing their limbo state is decoherance.
What you are really getting at is actually quantum teleportation. And the answer to you question then is: yes, you can carry charge without the charge traversing the intermediate distance. 'teleportation' is kind of a misnomer: it's more like 'copying'. So you have an electron at point A, with a certain spin, charge, velocity, etc. What you do is destroy the electron at point A with one part of an entangled pair and record the results. You have then 'collapsed' the wave function for the entangled pair, and know information about the second part of the formerly entangled pair. You can then take that second part of the formerly entangled pair, and using the results you obtained, reconstruct the electron at point B (aka make the copy. However, the original is always destroyed and the duplicate is an exact copy).
Now..... as you can imagine, that all takes alot of work, and something is still crossing the distance. Even if you had a stock of particles at point A that are entangled with corresponding particles at point B, you still have to send the information about your results from point A to point B. To be blunt, if what you are after is fast wireless power, microwaves is your best bet. If you want the fastet communication, optical is the way to go. The only way around this is if the results of the recent OPERA neutrino experiments are confirmed and neutrinos are, in fact, tachyonic.
Well, if they are, it throws off alot of stuff. For tachyons, the speed of light is a lower bound and there would be some possibility of negative mass there.... but I highly doubt that. There are so many neutrinos bouncing around the universe do to the frequency of nuclear reactions and neutrino's low interaction rate that we would see a much different expansion rate of the universe if they had a negative mass. It would not be uniform, but would have a faster expansion rate around galaxies (which is contrary to observation). And right now neutrinos are a candidate for some of the missing Dark Matter; which, if they have negative mass, would not only mean that they are not Dark Matter, but we then have more Dark matter to look for (to 'cancel out' the effect of the then exotic neutrinos).
If other dimensions are involved, it could be strong evidence for string theory. I say this because neutrinos are known to oscillate between different flavors and if other dimensions are involved, the oscillation frequency would be clearly related to the size of the other dimensions. I am extrapolating quite a bit, but the general idea is that your 'speed' through all dimensions is constant. If neutrinos are going faster-than-light in our dimensions, they would be moving slower in the other dimensions to compensate. The oscillation rate, the number of additional dimensions, the size of the additional dimensions could all, I think, be measured from the studying the neutrinos if this is the case. And these are exactly the things needed to untangle string theory and get some solid math going.
As for multiple universes... I dont see much hope for any possible connection there. If there are multiple universes, theres so many that it may as well be infinite. So, if the neutrino is going to one of these other universes, what are the chances that it would come back to ours? Near zero. So, then we would likely not see neutrinos at all.
More than likely, if the results are confirmed, the reasoning will be something akin to what I suggested (quantum tunneling), but this will still teach us quite a bit. And if the experiment is not confirmed, the reason why the experiment had the result it did will also still teach us something. It is an interesting result and something important will be learned. This is our generation's Michelson-Morley experiment or the 1999 expansion rate results, I think.
The exact position of an electron in it's orbit has an infinite number of positions and the exact one can never be known (generally speaking and using "specifically" in a very broad sense). Infinite "universes" might be quite different than what we imagine. They may be infinite possibilities but only realized in rare and dependent circumstances. They may have expressions at a level we aren't capable of perceiving. Not really that big an obstacle and no different than a lot of things we're looking at now.
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