Simulated quantum?

[undef00]

how?

i checked it out already and now i did it again ....

cool your avatar is variable now!! you manage that manually??? or automatically???

i would like to use an animated gif ....

[undef00]

links to vr's, etc. -I EXPECTED SOMEHTING DIFFERENT - I'll move on tomorrow and search the internet and if i find something i'LL post it in here again ...

thanks anyway!

[Scoopcone]

The program is (simply) the equation of the "Post-Einstein Universe". ("Simply, Everything")
(mc^2/E) +(E/mc^2) = 2, with each, Energy and matter, respectively, limited to the (never reachable) number One (1).

This is it guys, the entire Universe is in this equation along with the four forces of nature.

The entire "intellectually overshot" quantum theory is within that "matter" part of the equation.

If you had a computer of unlimited power, would you be able to program every single particle in the universe, simulate the four fundemental forces and all other necessary fields, and watch the particles unfold into the universe we know now? Or would it be impossible, because of quantum mechanics and the uncertainty principle? With this unlimited computer, would you be able to program in the laws of quantum mechanics for each particle? Could it be done (on a smaller scale) on a quantum computer?
Just some questions I thought of, if anyone has any theories on the answers.

[SinJin]

It can be done for a finite number of particles. What cannot be done is to keep track of one single particle and its forces from all other particles, say 24-7-52 (24 hours, 7 days, 52 weeks). Similar problems were encountered using Newtonian mechanics (the clockwork universe of absolute time and space) until the advent of analytical mechanics using variational principles, notable one being d'Alembert's principle.

If we assume the universe has a definite size and is not infinite, then wouldn't it have a finite amount of particles? If there is no limit to the computer's power, then I don't see why it wouldn't be possible to program in every particle (let's assume you also have an unlimited amount of time to do this). I realize that to simulate a quantum universe you would need to program in quantum uncertainty, and don't know if this part could be possible. Or would you not have to, because of decoherence, in which case as soon as the first two particles begin to interact their wave functions would collapse, therefore the uncertainty wouldn't be needed?

[undef00]

found two cool links:

http://phys.educ.ksu.edu/vqm/index.html

http://www.falstad.com/qmrotator/

there must be still lots of similar links on the internet - please paste into this thread if you find something cool - thanks!

[AntonioLao]

I realize that to simulate a quantum universe you would need to program in quantum uncertainty

Quantum uncertainty exists only if we want to simultaneously determine the exact values of a pair of conjugate variables (e.g. position and momentum). In practical situation, I really dont care whether I am in a room or outside the room but as long as I am alive is all that matter to me (its the momentum that keeps me alive). But if I am dead (i.e., momentum exactly zero), it really doesn't matter whether I am in a coffin or cremated. One thing that I am sure of, is that my time axis will live on forever and maybe reborn again in another time, another place.

[SinJin]

So what you're saying, Antonio, is that this simulation of all the particles in the universe interacting with each other would be possible?

[AntonioLao]

...simulation of all the particles in the universe interacting with each other would be possible?

Yes. However, as far as we know, no one has ever given a formal definition of quantum uncertainty. Moreover, in a 1927 paper by the man himself, Heisenberg stated quite certainly and succinctly that: ‘We cannot know, as a matter of principle, the present in all its details.’ Put in a different perspective, since time is dynamic, the present becomes the past; the future becomes the present and the past forgotten but not entirely only if recorded in human memory or movie reels, in papyrus, or in laser disc. The relative positions of these records are not important for all subsequent retrievals. Furthermore, the retrievals could be repeated, over and over again, without any noticeable degradation of the content. For anyone who wanted to change the ending of a movie, must remake it completely or partially. The ending of ‘Gone With the Wind’: ‘Frankly, my dear, I don’t give a damn’ into ‘Frankly, my dear, I do give a damn, let’s pretend nothing ever happened and start all over again, huh?’ On the other hand, from ‘Casablanca’: ‘Play it again, Sam’ into ‘Sam, stop playing that stupid song, I mean it! Right now!’

[SinJin]

uh, right.... anyways, I'm glad you were finally able to give an answer on the original question. So if we had a powerful enough computer, we could program in all the particles of the universe, apply the appropriate forces, and watch everything unfold - the stars forming, Earth coming about, humans evolving. But how improbable would this task be? I don't know how many particles are in the universe, probably a near infinite amount. But for an intelligent alien race who's been around for billions of years, perhaps they have been able to do this. If so, they wouldn't need to leave their planet to know what's happening elsewhere in the universe, they could just look at their simulation. Of course they could also predict the future if they sped the simulation up.

[AntonioLao]

I don't know how many particles are in the universe

Cosmologists give the estimated number of protons in the universe as 10 to the power 77.