Hugh wrote:I believe this is actually possible. I've read a bit about quantum entanglement, and the interconnection between all particles. We don't understand it all yet, but I think that there are things that happen on the quantum level that are fascinating. Perhaps there is a flow, a pattern, a memory on that level that could be accessed. Time will tell.
Btw, welcome to the forum.
Simple. Don't aim the machine at yourself. in fact, you would be operating the machine. so there would be no need to worry.houserichichi wrote:Welcome to the forum.
I've no opinion either way on quantum memory, so to speak, but I do have issue with your final point about travelling back to the 70s. If all the particles local to you were to revert back to their 70s positions and orderings (a whole discussion full of paradoxes, holes, and logical contradictions unto its own) what would stop the ones in your body from doing so?
I don't know what entaglement is in this sense. :? Besides, only the particles that remain in the field that the machine affects would be affected.Also, are we talking entanglement here or are you suggesting that particles essentially reverse direction and all processes they went through over the last 30 years to return to how they were? If that's the case then what about issues with superluminocity? You'd have neutrinos, for example, that have travelled 30 years at near-light speed having to return to their exact location in the past.
I basically like the 70's because of disco, although there are many other reasons, some semi-personal.Just a thought. If I could go back in time I might try the 70s for a week too...see how true to form the movies really are. Meet you at Studio 54?
houserichichi wrote:Introduction to quantum entanglement without maths
I meant "memory" in the latter sense. Also, I submitted this idea of quantum memory to madsci.org,(basically a Q and A site for science questions) and they said that evidence seems to preclude my theory, and they also said that there's no way to predict past or future events, even based on knoledge of position and velocity at any initial time. I think that they're wrong when it comes to the latter at least, but, I'm not sure.jinydu wrote:houserichichi wrote:Introduction to quantum entanglement without maths
I'm always suspicious about attempts to explain physics without math...
Regarding the main topic of this thread; I think it depends what you mean by "memory". Clearly, particles do not have "minds" like people do that can remember the past. However, if by "memory" you mean that the state of a system is completely determined by its state at some time in the past, then yes, I agree. For instance, if you know the wavefunction of a (nonrelativistic) quantum system,and the potential energy of interaction between all the particles that make up the quantum system, then you can use Schrodinger's equation to predict the wavefunction of the system at any time in the past or future. In fact, you don't even need quantum mechanics for this; an analogous fact is true in Newtonian mechanics: If you know the position and velocity of every particle in a system at some initial time, then you can predict the position and velocity of every particle at any time in the past or future.
Yes. But from what I can sumise from your post, the simple solution is to not measure it! (half joke). But seriously, it's looking like my theory is going belly up.houserichichi wrote:At the quantum level those guys are right. You can't predict and detect a particle's exact position on the quantum scale because the only way to see something is to bounce something smaller (like light) off of it. Bouncing light off a small particle inexorably results in a transfer of energy and so the system has changed from your predictions, thus the particle does not show up where you thought it would. Does that make sense?
The_Science_Guy wrote:I meant "memory" in the latter sense. Also, I submitted this idea of quantum memory to madsci.org,(basically a Q and A site for science questions) and they said that evidence seems to preclude my theory, and they also said that there's no way to predict past or future events, even based on knoledge of position and velocity at any initial time. I think that they're wrong when it comes to the latter at least, but, I'm not sure.
So you're saying that my theory isn't new?jinydu wrote:The_Science_Guy wrote:I meant "memory" in the latter sense. Also, I submitted this idea of quantum memory to madsci.org,(basically a Q and A site for science questions) and they said that evidence seems to preclude my theory, and they also said that there's no way to predict past or future events, even based on knoledge of position and velocity at any initial time. I think that they're wrong when it comes to the latter at least, but, I'm not sure.
Of course you can predict the past and future; the problem is that position and velocity are not the most fundamental properties of a particle; instead quantum mechanics deals most fundamentally with the particle's wavefunction. You can predict the wavefunction at any time in the past and future; all you need is the wavefunction at this moment, which you can measure by performing a very large number of measurements on many identically prepared quantum systems. Then you can use the laws of quantum mechanics to predict the wavefunction at any time in the past or future with arbitrary accuracy. Finally, if you really want to know the particle's position and velocity at any time, all you have to do is operate on the wavefunction at that time using the correct quantum operator, and you will get a probability distribution for position or velocity.
So, Science Guy, your idea isn't wrong. In fact, it has been known since the founding of quantum mechanics.
So particles do have "memory" that can be manipulated for pseudo-time travel?jinydu wrote:The_Science_Guy wrote: So you're saying that my theory isn't new?
Nope. In fact, I would say that it is more or less taken for granted.
It doesn't. By pseudo-time travel, I mean that a machine would revert n group of particles to a state and position that they were in sometime the past, thereby creating the illusion of "time travel". Do you see what I'm saying here? :?jinydu wrote:As I said earlier in the thread, particles have "memory" in the sense that the current state of a system completely determines its past and future states. I don't see what that has to do with time travel.
The_Science_Guy wrote:It doesn't. By pseudo-time travel, I mean that a machine would revert n group of particles to a state and position that they were in sometime the past, thereby creating the illusion of "time travel". Do you see what I'm saying here? :?
The_Science_Guy wrote:I basically like the 70's because of disco, although there are many other reasons, some semi-personal.
On another note: I'm almost 15, so I've never lived out the 70's, 80's or the first year of the 90's.
jinydu wrote:Of course you can predict the past and future;
You can predict the wavefunction ... which you can measure by performing a very large number of measurements on many identically prepared quantum systems.
Is a probability distribution a prediction?and you will get a probability distribution for position or velocity.
bo198214 wrote:Now I ask you, how you want to copy the original system identicly to perform your measures? As already was pointed out, measuring the system changes the system, was that reaching you?
Is a probability distribution a prediction?
jinydu wrote:but if your goal is to make a copy of the system just before the wavefunction collapses, that shouldn't be a probelm.
Yes, it is a statistical prediction. It also allows summarizing predictions such as expectation value and standard deviation (i.e. uncertainty).
jinydu wrote:Of course you can predict ... future;
darthbadass wrote:The_Science_Guy wrote:I basically like the 70's because of disco, although there are many other reasons, some semi-personal.
On another note: I'm almost 15, so I've never lived out the 70's, 80's or the first year of the 90's.
Disco!? You like disco!? You're flaming mad.
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