Home |
Search |
Today's Posts |
#41
Posted to rec.audio.tubes
|
|||
|
|||
Charie McCarthy - phone home
" wrote in
ups.com: That obsever will see two objects traveling FTL relative to each other as judged by the distances achieved in the time they are achieved. That's meaningless, because the statement itself "relative to" means that the measurement is done from one of the objects. The third observer will see two objects covering each half of that distance, each below the speed of light. Calling it FTL is a slight of hand. The fact is no object can travel through space faster than c. Space itself of course can expand and contract at unlimited speed (indeed beyond our Hubble volume, galaxes are moving away from us at greater than c because space expansion between every piece of matter and relativistic limits apply to moving through space). |
#42
Posted to rec.audio.tubes
|
|||
|
|||
Charie McCarthy - phone home
Prune wrote: " wrote in ups.com: dilation may explain the internal effects, but not what an observer will perceive viewing from a neutral position outside either object. You don't seem to get it. There is _no_ neutral position. ALL positions are relative. And relativistic speed is not that simple to define, and lenghts shorten towards zero as speed approaches c. Let's keep it simple. Do the two moving objects reach those 0.5 LY distant points in ~5.4 months or not? Never mind what they do relative to each other for the moment. OF COURSE THERE IS NO NEUTRAL POSITION. ALL POSITIONS OBSERVE "RELATIVELY". But the results relative to any given observer are key. Peter Wieck Wyncote, PA |
#43
Posted to rec.audio.tubes
|
|||
|
|||
Charie McCarthy - phone home
"Prune" wrote in message 4.76... : " wrote in : ups.com: : : dilation may explain the internal effects, but not what an observer : will perceive viewing from a neutral position outside either object. : : You don't seem to get it. There is _no_ neutral position. ALL positions : are relative. And relativistic speed is not that simple to define, and : lenghts shorten towards zero as speed approaches c. Agreed, it seems Peter makes the common mistake of mixing classical and relativistic views. Simply put, Einstein maintained that c is a truely universal constant, upper limit to attainable speed in space and everything, that is time and length, 'adapts' to conform to that. Effectively reaching far away places faster then light would take to get there may still be possible, though, if controlled warping of space could be achieved yep, the stuff of SF ;-) as you're bending 'the rules' in that case. Rudy |
#44
Posted to rec.audio.tubes
|
|||
|
|||
Charie McCarthy - phone home
"Ruud Broens" said:
Effectively reaching far away places faster then light would take to get there may still be possible, though, if controlled warping of space could be achieved yep, the stuff of SF ;-) as you're bending 'the rules' in that case. You mean you've never heard of something called the "Stargate"? We don't need ships etc., that's sooooo 20th century! ;-) -- "Due knot trussed yore spell chequer two fined awl miss steaks." |
#45
Posted to rec.audio.tubes
|
|||
|
|||
Charie McCarthy - phone home
Sander DeWaal wrote in
: You mean you've never heard of something called the "Stargate"? We don't need ships etc., that's sooooo 20th century! ;-) LOL. On the serious side, if travel through wormholes was possible, then you could take one end of the wormhole and move it near c then bring it back, and it would be lagged in time. Going in the other end would then take you back in time. Which means you could have the paradox where you go back in time and kill yourself before you went into the wormhole but oh wait then you didn't really go through aaarghhh Nature is not inconsistent at such a level and a paradoxical situation like this cannot be. Most physicists are pretty sure that though wormholes may exist using them for travel or information transfer etc. is not possible. |
#46
Posted to rec.audio.tubes
|
|||
|
|||
Charie McCarthy - phone home
" wrote in
ups.com: Do the two moving objects reach those 0.5 LY distant points in ~5.4 months or not? Never mind what they do relative to each other for the moment. But Peter, someone must be doing the timing. And that observer has no way to verify their starting positions but by observing the light (delayed) as it reaches him from those observers. But yes, special relativity lacks something important. That is, when two observers are moving relative to each other, which one will have his time slowed down relativistically? In other words, there _is_ some difference in reference frames. But you need to include acceleration and general relativity for this. |
#47
Posted to rec.audio.tubes
|
|||
|
|||
Charie McCarthy - phone home
"Prune" wrote in message 4.76... : Sander DeWaal wrote in : : : : You mean you've never heard of something called the "Stargate"? : We don't need ships etc., that's sooooo 20th century! ;-) : : LOL. On the serious side, if travel through wormholes was possible, then : you could take one end of the wormhole and move it near c then bring it : back, and it would be lagged in time. Going in the other end would then : take you back in time. Which means you could have the paradox where you go : back in time and kill yourself before you went into the wormhole but oh : wait then you didn't really go through aaarghhh Nature is not inconsistent : at such a level and a paradoxical situation like this cannot be. Most : physicists are pretty sure that though wormholes may exist using them for : travel or information transfer etc. is not possible. Heh, ok, traveling backwards in time, that's where i'd draw the line, but i prefer the phenomenological view on physics, that is, we just correlate observed (apparently physical) phenomena, but can not truthfully say ....this is how reality *is*..... only this is what it appears to be a lot is interpretation, for instance, a particular non linear distortion of a field can have exactly the same characteristics as a particle at that point - i'm sure pjw would argue if it quacks like a duck, looks like a duck, ... but in physics, it is not that clear cut :-) a lot of today's physics is actually mathematics and that may, paradoxically, lead to completely unscientific ideas, like superstring theory, in the classical sense of Popper, that is not a scientific theory - not falsifiable Rudy |
#48
Posted to rec.audio.tubes
|
|||
|
|||
Charie McCarthy - phone home
"Ruud Broens" wrote in
: Heh, ok, traveling backwards in time, that's where i'd draw the line, but i prefer the phenomenological view on physics, that is, we just correlate observed (apparently physical) phenomena, but can not truthfully say ...this is how reality *is*..... only this is what it appears to be a lot is interpretation, for instance, a particular non linear distortion of a field can have exactly the same characteristics as a particle at that point - i'm sure pjw would argue if it quacks like a duck, looks like a duck, ... but in physics, it is not that clear cut :-) Yep, a lot of mumbo jumbo gets mixed into physics, even by physicists (like concsiousness for example, and other crap). Check out Mohrhoff's interpretation of QM. It's refreshing, to say the least. http://arxiv.org/abs/quant-ph/9903051 I'm quoting myself from the forum: In Mohrhoff's interpretation, counterfactuals are assigned objective probabilities in whose calculation not just past/present, but also future facts are taken into account. Also, to quote a Marchildon paper, according to Mohrhoff's view "no unmeasured observable of no individual system whatsoever has a true value in the interval between pre- and postselection." Mohrhoff sees quantum theory not as a direct model of reality, but as the information we can know about it, a probability algorithm for assigning abovesaid values. This is also a good one, where he trashes those that like to mix consciousness with QM: http://xxx.lanl.gov/abs/quant-ph/0105097 Enjoy ;P |
#49
Posted to rec.audio.tubes
|
|||
|
|||
Charie McCarthy - phone home
flipper wrote in
: Now you're falling into the same trap Peter was; trying to talk about the 'end of a wormhole', which is, itself, a warping of the space time fabric, as if it were a Newtonian object. I was referring to the opening of the wormhole and translating it in space. The scenario I noted was just a summary of something a physics teacher mentioned couple years ago to us, though I forget the reference of whom he was summarizing. But it supposedly comes from an actual line of reasoning that's not as handwaving argument as what I presented. And how do you so firmly know the 'consistency' of nature? (There are time theories that deal with such matters) I was pretty specific of what sort of inconsistency I was talking about. I consider block time (all time instants are equally valid references, i.e. all as 'real') as the only sensible view. The appearance that time 'flows' is a psychological artifact. In this construct, time paradoxes such as the above simply cannot be, as it would imply two different states in the same region of space-time. I haven't taken a poll of 'most physicists', have you? On the other hand, a 'poll of most physicists' in 1900 would have told you the aether theory was 'proved' beyond any reasonable doubt and there were no new fundamental principles of physics left to be discovered. I think this inductive argument doesn't hold water. Just because the sun rises some hours after it sets every day for a bunch of cycles doesn't mean it will do so forever (and of course one day it won't rise). I view science's modeling of the unvierse as asymptotically approaching some limit (regardless of whether that limit is a perfect model of the universe or what is knowable about this is limited). It's not a smooth approach, of course ;P Speaking of knowledge, I do think we are limited. Penrose's nonsensical musings about non-computational physics non-withstanding (his argument has been formally refuted), quantum limits like the non-infinitely differentiable nature of space-time and the Bekensten bound which limits the number of possible distinguishable quantum states in a finite region of space, lead inevitably to the conclusion that we are just as subject to the limits on information processing that the Church Turing thesis prescribed to computers. Of course, the abstraction of a Turing Machine doesn't interact with its environment, as some argue, but that's no real escape since one can just include the environment (delimited by at most the past light cone of the information processor in question) and the overall system can be mapped to a finite automaton. OK that did get off topic didn't it... |
#50
Posted to rec.audio.tubes
|
|||
|
|||
Charie McCarthy - phone home
Ruud Broens wrote: a lot of today's physics is actually mathematics and that may, paradoxically, lead to completely unscientific ideas, like superstring theory, in the classical sense of Popper, that is not a scientific theory - not falsifiable Actually, mathematics allows for FTL and everything else as there is no relativistic effects in pure numbers. But the point of my simple-minded exercise is in-part based on the Fable of the Eagle & the Wren in a contest to become the King of the Birds. All the birds got together and decided to choose a king. They discussed the Peacock, but decided that although beautiful, he was empty-headed and vain. They discussed the Owl, but decided that he was wise, but always sleepy. Finally, they decided that the bird who could fly the highest would become the King. The Eagle then stated that he could fly the highest and asked for any challenger. A tiny wren piped up and said: "I will best you at that!", and took off straight up. The eagle started up in lazy circles all pleased with himself. Meanwhile the tiny wren flew onto the eagle's back and concealed himself in the feathers. When the eagle had flown as high as he could and called out for the wren, the wren rose from the eagle's back and said: Here I am, above you! We can all agree that an object will not be able to accelerate to light-speed from a 'standing start' at any given point. Nor will two objects traveling in opposite directions appear to be traveling FTL, even if they 'arrive' at a distance that suggests so *relative to each other*. However, if one has an infinite number of "eagles", each adding an increment of speed to the next eagle, eventually, that "wren" will be traveling FTL relative to the original starting point, but only a small increment faster than its previous eagle. This would appear to not violate energy requirements as the relativistic differences would be tiny (in the Newtonian region). The trick is getting all those eagles in the right positions. Wormholes notwithstanding, my typical illustration of FTL travel is either the flatlander's perception of a piece of paper... fold the paper and the flatlander can reach the opposite corner in an infinitely short period of time. Or in three dimesions, imagine a New Yorker living on the 24th floor of an apartment building facing north on 53rd Street. He has a friend who lives on the 24th floor of an apartment building facing south on 52nd Street. Coincidentally, his bedroom closet backs on his friend's bedroom closet, with a distance of some 30 inches of steel, masonry and plaster between them. To visit, they must go down 240 feet, around the block, up 240 feet and so forth. Or, they cut through the wall (and presumably rebuild it) each time they visit. If wormholes are postulated, then the presumption is that the transport occurs in an infinitely short-but-not-0-time. But even accepting the potential for a wormhole to deliver prior to leaving, so to speak, however one measures that aheadness, there is no potential for paradox as that would cause an infinite regression resulting in the triggering event hot happening in the first place... that is, time would 'reset' rather than permit a paradox that would violate conservation-of-energy requirements. I refer you to Isaac Asimov, and his 1941 story "Not Final". Asimov is another hard-scientist who had no difficulty speculating on FTL, force-fields and all sorts of other stuff considered impossible (at least) to the hidebound. I am surprised, frankly, that the thought of FTL would cause such a ruckus and a retreat to a rigid view of relativistic physics. As far as I can see, nothing I have suggested violates relativity excepting artful language to describe actual results. And as far as "artfulness" is concerned, we are ourselves on a moving body in an universe of other moving bodies where any movement(s) we make are incremental to already established movements in already established vectors. So, if we choose the correct vector and add the correct increments... why not? Or, in answer to Xeno's Paradox: I am not trying to get *TO* the tortoise, I am trying to get five steps *BEYOND* the tortoise. However, once I reach the tortoise, I change my mind. That is how artful language solves logically insoluble paradoxes (but it is not reality). Frontal attacks don't. An example of the Frontal Attack is the Crimmins Mack Truck Theory (After William Crimmins, who answered with it when asked to explain Xeno's Paradox): Give Xeno a 100-foot running start on a Mack Truck. Theoretically, he should not have to step out of the way. That is reality, but no solution. Peter Wieck Wyncote, PA |
#51
Posted to rec.audio.tubes
|
|||
|
|||
Charie McCarthy - phone home
flipper wrote: Besides the obvious problem of where you're going to find an infinite number of eagles you're trying to accelerate an infinite mass (at the light speed point) with a finite 'increment 'and any finite number divided by infinity is zero (acceleration). Actually, no I am not trying to accelerate an infinite mass. I am trying to accelerate a relatively small mass (one wren) by a tiny increment, that last increment that makes it (relative to the very first eagle) travel FTL. However relative to all other eagles (and all other eagles relative to each other), it is NOT going FTL, but some less-than-c increment faster. Assume that each eagle in the chain starts 'at rest' relative to the next eagle, which departs from it. There are no relativistic speeds at any point in the process from first-to-last, just what is within the nature of 'eagles' and 'wrens'. I also know that the very first eagle will observe the wren under red-shift light conditions, and so-forth. But to that theoretical external observer, that wren will arrive one LY in distance at some however-tiny fraction less than one year. Even if the travel observed is as the base of a triangle peaking at the observer. Similarly the two previous moving objects departing Earth's poles. If you make their end-points the corners of that triangle, then the distance between them (1LY) was made in less than one year. The feather-mite on the Eagle's back sees the wren fluttering away at a very wrenlike speed. And the mite's brother on the underbelly of the Eagle sees the previous eagle getting further away at a very eagle-like speed, and so forth back to that very first eagle. Peter Wieck Wyncote, PA |
#52
Posted to rec.audio.tubes
|
|||
|
|||
Charie McCarthy - phone home
"flipper" wrote in message ... : On Tue, 8 Aug 2006 17:04:44 +0200, "Ruud Broens" : wrote: : : : "Prune" wrote in message : 44.76... : : " wrote in : : ups.com: : : : : dilation may explain the internal effects, but not what an observer : : will perceive viewing from a neutral position outside either object. : : : : You don't seem to get it. There is _no_ neutral position. ALL positions : : are relative. And relativistic speed is not that simple to define, and : : lenghts shorten towards zero as speed approaches c. : : Agreed, it seems Peter makes the common mistake of mixing classical and : relativistic views. Simply put, Einstein maintained that c is a truely universal : constant, upper limit to attainable speed in space and everything, that is : time and length, 'adapts' to conform to that. : : Effectively reaching far away places faster then light would take to get there : may still be possible, though, if controlled warping of space could be achieved : yep, the stuff of SF ;-) : as you're bending 'the rules' in that case. : : You're essentially correct up to the 'bending' of 'the rules' part. : 'Warps' and 'wormholes' arise form Einstein's original equations. of course (interesting typo bending the rules in the sense that in the described scenario, you're no longer travelling *through* space, just ride along deformed space 'bouncing back'. no applicable limits, thus. : : For some fun reading, that doesn't require one be a calculus whiz, see : Kip Thorne's book "Black Holes and Time Warps - Einstein's Outrageous : Legacy." thanks for the tip R. : : : Rudy : : |
#53
Posted to rec.audio.tubes
|
|||
|
|||
Charie McCarthy - phone home
"flipper" wrote in message ... : On Tue, 8 Aug 2006 22:16:46 +0200, "Ruud Broens" : wrote: : : : "flipper" wrote in message : .. . : : On Tue, 8 Aug 2006 17:04:44 +0200, "Ruud Broens" : : wrote: : : : : : : "Prune" wrote in message : : 44.76... : : : " wrote in : : : ups.com: : : : : : : dilation may explain the internal effects, but not what an observer : : : will perceive viewing from a neutral position outside either object. : : : : : : You don't seem to get it. There is _no_ neutral position. ALL positions : : : are relative. And relativistic speed is not that simple to define, and : : : lenghts shorten towards zero as speed approaches c. : : : : Agreed, it seems Peter makes the common mistake of mixing classical and : : relativistic views. Simply put, Einstein maintained that c is a truely : universal : : constant, upper limit to attainable speed in space and everything, that is : : time and length, 'adapts' to conform to that. : : : : Effectively reaching far away places faster then light would take to get there : : may still be possible, though, if controlled warping of space could be : achieved : : yep, the stuff of SF ;-) : : as you're bending 'the rules' in that case. : : : : You're essentially correct up to the 'bending' of 'the rules' part. : : 'Warps' and 'wormholes' arise form Einstein's original equations. : : of course (interesting typo : bending the rules in the sense that in the described scenario, you're no longer : travelling *through* space, just ride along deformed space 'bouncing back'. : no applicable limits, thus. : : Kind of a 'play on words'. hehe : : : : : For some fun reading, that doesn't require one be a calculus whiz, see : : Kip Thorne's book "Black Holes and Time Warps - Einstein's Outrageous : : Legacy." : : thanks for the tip : : I've had to buy the thing three times because it never comes back when : I lend it out, so I suppose that's a 'recommendation'. hehe. : :-)) ok, some online recommended's: *Hendrik van Hees on The Early Universe (the universe appears to be flat - where the heck is all that energy and matter ?) is it real or the result of a model illustrated by the illusive *resonance particle or *Milo Wolff stating an electron is a continuous wave structure of equal inward and outward waves, not a material particle who says there is just a 4 dim. spacetime ? *De Berardini says 6, that's 3 time axis for ya etc etc :-)) Rudy |
#54
Posted to rec.audio.tubes
|
|||
|
|||
Charie McCarthy - phone home
Even beyond that, there is the issue is of each eagle starting relative
to the other in the way he describes. The problem is these eagles are all moving through space, and they all need to accelerate to their respective speeds and you just can't get the sort of set up you are describing. From special relativity alone this is not clear, but consider that cosmologically the locally gravitationally bound dispersion of matter (in our case, the local cluster of 31 galaxies is gravitationally bound; the rest will disappear beyond the Hubble volume due to accelerating expansion) sets a local inertial frame that pretty much determines your starting point. The local entropy of the system ensures that any macroscoping grouping of matter will tend to have average velocity that is not a significant fraction of c. flipper wrote in : On 8 Aug 2006 13:09:09 -0700, " wrote: flipper wrote: Besides the obvious problem of where you're going to find an infinite number of eagles you're trying to accelerate an infinite mass (at the light speed point) with a finite 'increment 'and any finite number divided by infinity is zero (acceleration). Actually, no I am not trying to accelerate an infinite mass. I am trying to accelerate a relatively small mass (one wren) by a tiny increment, that last increment that makes it (relative to the very first eagle) travel FTL. However relative to all other eagles (and all other eagles relative to each other), it is NOT going FTL, but some less-than-c increment faster. Assume that each eagle in the chain starts 'at rest' relative to the next eagle, which departs from it. There are no relativistic speeds at any point in the process from first-to-last, just what is within the nature of 'eagles' and 'wrens'. I also know that the very first eagle will observe the wren under red-shift light conditions, and so-forth. But to that theoretical external observer, that wren will arrive one LY in distance at some however-tiny fraction less than one year. Even if the travel observed is as the base of a triangle peaking at the observer. Similarly the two previous moving objects departing Earth's poles. If you make their end-points the corners of that triangle, then the distance between them (1LY) was made in less than one year. The feather-mite on the Eagle's back sees the wren fluttering away at a very wrenlike speed. And the mite's brother on the underbelly of the Eagle sees the previous eagle getting further away at a very eagle- like speed, and so forth back to that very first eagle. Won't work because you have your frames of references jumbled and jump from one to the other. The 'small increment' of the "wren" will be relative to that frame of reference and, as you yourself noted, one isn't going to accelerate the wren to light speed in one jump, which is what would need to happen from that frame of reference. Observing from the "first eagle," however, you've got super massive and contracted, eagles and wren out there and no matter how hard that last 'push' is it ain't enough. Just ain't gonna happen, as long as Einstein was right. Peter Wieck Wyncote, PA |
#55
Posted to rec.audio.tubes
|
|||
|
|||
Charie McCarthy - phone home
Prune wrote in
4.76: average velocity that is not a significant fraction of c. Emphasis on velocity here of course -- if the object is very hot, average speed of the particles can be very high, but velocity doesn't change. |
#56
Posted to rec.audio.tubes
|
|||
|
|||
Charie McCarthy - phone home
flipper wrote in news:lgqhd295g9in20dlp1cd83982qil5ufpt7
@4ax.com: Put colloquially, 'scientific facts' do no follow popularity contests. Sure, but on the other hand consensus generally follows the probably approximately correct truth given current understanding -- which improves over time. I don't see big revolutions in science any more, just refinements. Ever since Newton, it seems that we are nailing down more and more of a better model of the world, leaving only extreme conditions where older theories fail to be expanded upon. |
#57
Posted to rec.audio.tubes
|
|||
|
|||
Charie McCarthy - phone home
flipper wrote in
: That's nice. But I said matter, not quanta. Matter particles are quanta too. And in a Bose-Einstein condensate, whole collections of particles can behave like a single quantum. |
#58
Posted to rec.audio.tubes
|
|||
|
|||
Charie McCarthy - phone home
flipper wrote in
: No. The link I had posted disagrees. The animation of the wavepacket is an electron, a matter particle. The only difference between matter and energy particles (fermions and bosons) is fractional spin and mass on the former. |
#59
Posted to rec.audio.tubes
|
|||
|
|||
Charie McCarthy - phone home
flipper wrote in
: Covering the walls of a container and imploding, two observed effects, are hardly "behaving like a single quantum." Look around for animations of a wavepacket in infinite square well. |
#60
Posted to rec.audio.tubes
|
|||
|
|||
Charie McCarthy - phone home
flipper wrote in
: Under the classical Copenhagen interpretation the 'wave packets' you keep speaking of are statistical functions and not a statement about 'structure'. Indeed, but this is not the currently most favored interpretation (and in this case, there have been pollings of physicists in regards to this question). Irrespective of this, such statistical functions have definite spatial distributions and a macroscopic wavepacket such as in a Bose- condensate exhibits these shapes. |
#61
Posted to rec.audio.tubes
|
|||
|
|||
Charie McCarthy - phone home
flipper wrote in
: No, the link you posted doesn't 'disagree' and as just one example, a proton is not an electron.. Sure, the proton is not a fundamental particle, it's composed of quarks. And the wavepacket that describes quarks are far smaller because their larger mass gives them much shorter de Broglie wavelengths. |
#62
Posted to rec.audio.tubes
|
|||
|
|||
Charie McCarthy - phone home
flipper wrote in
: There is a definition of quantum and an atom, or collection of atoms, being in the lowest energy state doesn't make them one. This is not just a matter of lowest energy state. In a Bose-condensate all wavepackets become synchronized and individual atoms no longer exist. As temperature changes atoms absorb or emit quanta but they is not one. The bosons like photons that are carriers of the EM interaction, and the colored gluons that are carriers of strong interaction in the nuclei, are just two examples of quanta. Fermions like electrons and quarks are also quanta, and also described by wavepackets. |
#63
Posted to rec.audio.tubes
|
|||
|
|||
Charie McCarthy - phone home
flipper wrote in
: That isn't what it said. It said they were (mathematically) 'indistinguishable'. That's all that matters, unless you are proposing a hidden-variables interpretation (something that's regarded as unacceptable by current thinking). If they are mathematically indistinguishable, they are indistinguishable in all but hidden-variables interpretations. |
#64
Posted to rec.audio.tubes
|
|||
|
|||
Charie McCarthy - phone home
flipper wrote in
: and a macroscopic wavepacket such as in a Bose- condensate exhibits these shapes. Prove it. The text I quoted claims this, and I find no contradiction during my web search. |
#65
Posted to rec.audio.tubes
|
|||
|
|||
Charie McCarthy - phone home
flipper wrote in
: I'm just going by your assertion of macro objects and, so, used one. Hmm? I'm not sure what you mean by my assertion of macro objects. |
#66
Posted to rec.audio.tubes
|
|||
|
|||
Charie McCarthy - phone home
flipper wrote in
: issue is whether the graph of a 'wave packet' represents the physical structure and it would probably (pun) be the first time in history There is nothing in the theory that says there is any 'structure' at all. If you say there is, the onus is on you to show justification for such an extension. People have tried this (hidden variables versions), and failed. it. To wit, the odds of a coin toss is well known but one would hardly claim that .5h+.5t describes the structure of a quarter. A quarter is a macroscopic object, so this is irrelevant, as various things (depending on interpretation, but most often ascribed to decoherence) prevent superpositions of macroscopic objects. |
#67
Posted to rec.audio.tubes
|
|||
|
|||
Charie McCarthy - phone home
This is one possible version, and far from widely accepted. Since I see
discussion has taken such a turn, I'll also link to my favorite version, in which space/time are not things but merely artifacts of positional attributes of quanta: http://xxx.arxiv.org/abs/quant-ph/0412182 (related is http://arxiv.org/abs/quant-ph/0105097 and also interesting are Marchildon's comments on this http://arxiv.org/abs/quant-ph/0303170 and the general class of interpretations to which it belongs http://arxiv.org/abs/quant-ph/0405126 ) flipper wrote in : On Sat, 12 Aug 2006 06:58:00 GMT, Prune wrote: flipper wrote in m: Nice pun but no it isn't when physical structure is the interest rather than simply the statistical odds. The pun was unintentional. What makes you think there is any definite 'physical structure'? Because we don't know of anything that doesn't. These people are working in the same direction I was. http://www.quantummatter.com/body_spin.html At the bottom "But note that spin, and other properties, are attributes of the underlying quantum space rather than of the individual particle. This is why spin, like charge, has only one value for all particles. --- The properties depend on the structure of space.----" (emphasis added) "This structure settles a century old paradox of whether particles are waves or point-like bits of matter. They are ---wave structures in space.---- (emphasis added) There is nothing but space. As Clifford speculated 100 years ago, matter is simply, "undulations in the fabric of space". " Those 'wave structures in space' are the waves *I* was speaking of. (OK, so I'm a bit late in independently postulating it) Note, don't confuse the two 'waves'. They're talking about "undulations in the fabric of space (rather than of the individual particle)" whereas quantum mechanics is giving the probability of observing that "undulation in the fabric of space." For an illustration of it, see the animation down low on this page http://www.quantummatter.com/ Your 'normal' quantum equations give the probability of where the 'wave-particle' is but, 'in reality' (theory) there is no 'particle' but a 'space-wave'. As they note, this resolves the 'wave particle duality' conundrum since there aren't 'two things', just the space wave, and that's precisely how I arrived at it, in postulating there is no 'duality'. What does that mean exactly anyway? Same kind of thing as it means to space-time. That's a tautology. And? Look it up. |
#68
Posted to rec.audio.tubes
|
|||
|
|||
Charie McCarthy - phone home
flipper wrote in
: The significant 'turn' is that you have finally acknowledged 'I have a little theory of my own'. Thank you. Welcome. In other words, he's saying precisely what I said and what you objected to. I don't quite see it that way. He doesn't ever suggest there is any knowable "structure" beyond the probabilistic description. Indeed, QM models all we can know about the system. He does not say that "space/time are not things but merely artifacts of positional attributes of quanta." That is simply false. In the secondary reference by him I posted, http://arxiv.org/abs/quant-ph/0105097 read section 9, The Spatiotemporal Differentiation of Reality. I quote (underscore emphasis mine): "The only positions in existence are (i) the (not manifestly fuzzy) positions of macroscopic objects and (ii) the positions possessed by objects in the quantum domain. The latter are **defined by the sensitive regions of macroscopic detectors**, are always finite in extent, and are **possessed only when indicated**. The proper way of thinking, speaking, or writing about a region of space, therefore, is to never let the logical or grammatical subject of a sentence refer to it. **Regions of space are not things that exist by themselves, nor are they parts of a thing that exists by itself**. Since they **exist only as properties of material things**, only predicates of sentences about material things should refer to them." He then goes on to elaborate on this, extend it to time as well as space, and argue that this space-time, which is defined solely by fact- indicating properties of objects as explained elsewhere in that paper, is only finitely differentiable. "What is inconsistent with QM is the existence of an intrinsically and infinitely differentiated space-time continuum. Neither space nor time is a world constituent that exists independently of matter." Which is exactly what I said in my previous post. At the very least he's 'sympathetic' to my endeavor for a deeper understanding. Huh? He says right in what you quoted that the "sustaining myth" is "the belief that we can find out how things really are." We can't. His interpretation is of the class of interpretations where QM is a description of the possible human knowledge about a system, and in saying this I'm paraphrasing Marchildon's review of Mohrhoff's interpretation (which the latter acknowledges and mostly agrees with in another paper). |
#69
Posted to rec.audio.tubes
|
|||
|
|||
Charie McCarthy - phone home
flipper wrote in news:q673e25ga7r3lipr1eoeb00jdtcn051g54
@4ax.com: Possibly because you snipped the whole thing out to then say you don't see it. I snipped it because I didn't have anything to say on it, other than what I did, that I didn't see it that way. You argued "All quanta are wave packets" (your original assertion), Yes, that's what they are in the theory. which is a 'structural' declaration. How? Yet you also argue there is no structure Indeed, there is no structure. Any structure one may guess at that is beyond the probabilistic descriptions of the equations is part of the "sustaining myth" that was quoted -- inaccessible by human knowledge, and thus the existence of any such structure is metaphysics, basically meaningless. and then argue QM isn't a collection of probabilistic equations. Where did I say that? I understand what he's saying. I did/do not understand what you were (and don't intend to get into a discussion on the nature of space-time). LOL, who's snipping now... The construction of space-time wasn't the discussion. My 'little theory' was. Er, right... considering that this thread is completely off-topic in this group, accusing me of going off-topic is ludicrous. Then I disagree. Yes. |
#70
Posted to rec.audio.tubes
|
|||
|
|||
Charie McCarthy - phone home
flipper wrote in
: I reject that notion just as I would have when the same thing was said about atoms, and then subatomic particles. That would imply you expect one to find deeper and deeper structure, ad infinitum (and I say ad absurdum). I also reject it on general principle. Which is? |
#71
Posted to rec.audio.tubes
|
|||
|
|||
Charie McCarthy - phone home
flipper wrote in
: What's absurd is to imagine mankind has achieved complete knowledge of all things. No, just that we have achieved the limits of our knowledge in some directions. There are limits to knowledge, and indeed these have been studied formally (Godel and Church-Turing restrictions apply to humans not just computational machines because of the Bekenstein bound). No reason not to expect we've reached some of these limits. And of course, besides theoretical limits to knowability and our ability to determine (mathematical/scientific) truths, things that are beyond the experimental or observational are left to the realm of metaphysics and makes no sense to discuss them. |
#72
Posted to rec.audio.tubes
|
|||
|
|||
Charie McCarthy - phone home
flipper wrote in
: it's impossible to define what one doesn't know It is very much possible to delineate at least some of the things that are unknowable, and the study of logic and branches of philosophy deal with this. the wonderful arguments based on current understanding notwithstanding. You can throw around the word "notwithstanding", but it doesn't make it applicable. |
Reply |
|
Thread Tools | |
Display Modes | |
|
|
Similar Threads | ||||
Thread | Forum | |||
Yahama "natural sound" amp specs? | Tech | |||
HomeToys April Emagazine | Marketplace | |||
"Home Sweet Studio" interesting article in Sunday NY Times | Pro Audio | |||
Is a Home Business Right For You? | Marketplace | |||
HomeToys Home Technology Newsletter | Marketplace |