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Forum » SpaceEngine » Science and Astronomy Discussions » Is the universe a simulation? (Many physicists think this...)
Is the universe a simulation?
DoctorOfSpaceDate: Tuesday, 25.06.2013, 20:45 | Message # 61
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Quote (Watsisname)
Incorrect.


No I am correct. A computer cannot run on low energy. If you think so, then pull your power cord out and run your computer off your CMOS battery on the motherboard. It doesn't matter how fast or how slow you run a simulation on the machine, inevitably the energy available to the computer will drop below the required amounts and the simulation will end.





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midtskogenDate: Tuesday, 25.06.2013, 21:13 | Message # 62
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Quote (Watsisname)
But again, the server may be able to detect this and intervene, removing any inconsistencies without our ever being aware.

It could detect whether a glitch has occurred or whether intelligence has discovered the truth, and simply end the simulation, rewind to the last good point and continue with slightly different parameters.

Quote (Watsisname)
There's probably a lowest possible temperature that the universe can reach

But energy isn't temperature. Energy is mass. Are you saying that an implication of the Big Rip is that mass no longer can be turned to energy or that all mass then simply cease to exist?





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werdnaforeverDate: Wednesday, 26.06.2013, 00:33 | Message # 63
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Quote (midtskogen)
Energy is mass

They are different forms of the same thing. The universe could be all energy (perhaps radiation) or all matter (perhaps... um, how about rocks).
 
WatsisnameDate: Wednesday, 26.06.2013, 01:00 | Message # 64
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Quote (DoctorOfSpace)
It doesn't matter how fast or how slow you run a simulation on the machine, inevitably the energy available to the computer will drop below the required amounts and the simulation will end.


Your example is a statement about the limits of modern computer architecture, not the limits set by physics itself. Freeman Dyson wrote a very famous paper on this topic.

Quote (midtskogen)
It could detect whether a glitch has occurred or whether intelligence has discovered the truth, and simply end the simulation, rewind to the last good point and continue with slightly different parameters.


Precisely. smile

Quote (midtskogen)
But energy isn't temperature.

I'm talking about the temperature of the cosmic background radiation, which is the ultimate thermodynamical limit to the amount of energy available to do work by any computational system in our universe.

Edit: I feel I should elaborate a little further. When we talk about the CMB, we often talk about it as having a temperature. But what we are actually referring to is the wavelength and therefore energy of the photons. We correlate it to temperature because it almost perfectly follows a blackbody distribution, where peak wavelength is a simple function of temperature.







Edited by Watsisname - Wednesday, 26.06.2013, 01:28
 
Forum » SpaceEngine » Science and Astronomy Discussions » Is the universe a simulation? (Many physicists think this...)
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