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I sometimes ponder where new entropy/randomness is coming from, like if we take the earliest state of universe as an infinitely dense point particle which expan
by utkarsh858 2y ago
I sometimes ponder where new entropy/randomness is coming from, like if we take the earliest state of universe as an infinitely dense point particle which expanded. So there must be some randomness or say variety which led it to expand in a non uniform way which led to the dominance of matter over anti-matter, or creation of galaxies, clusters etc.
If we take an isolated system in which certain static particles are present, will there be the case that a small subset of the particles will get motion and this introduce entropy? Can entropy be induced automatically, atleast on a quantum level?
If anyone can help me explain that it will be very helpful and thus can help explain origin of universe in a better way.
- pseidemann 2y agoI saw this video, which explained it for me (it's german, maybe the automatic subtitles will work for you): https://www.youtube.com/watch?v=hrJViSH6Klo https://www.youtube.com/watch?v=hrJViSH6Klo He argues that the randomness you are looking for comes from quantum fluctuations, and if this randomness did not exist, the universe would probably never have "happened".
- utkarsh858 2y agoThanks for the reference will take some time before I see the whole video. Can you tell me what those quantum fluctuations are in short? Are they part of some physical law?
- empath75 2y agoSymmetry breaking is the general phenomenon that underlies most of that. The classic example is this: Imagine you have a perfectly symmetrical sombrero[1], and there's a ball balanced on top of the middle of the hat. There's no preferred direction it should fall in, but it's _unstable_. Any perturbation will make it roll down hill and come to rest in a stable configuration on the brim of the hat. The symmetry of the original configuration is now broken, but it's stable. 1: https://m.media-amazon.com/images/I/61M0LFKjI9L.__AC_SX300_SY300_QL70_FMwebp_.jpg https://m.media-amazon.com/images/I/61M0LFKjI9L.__AC_SX300_S...
- utkarsh858 2y agoYes but what will intimate that perturbation?