Arvin Ash

Loop Quantum Gravity Reveals What Came Before the Big Bang (2018x46)

Udgivelsesdato: Dec 24, 2018

The closest thing we have to an all-encompassing framework that explains all particles and forces is represented by the Standard Model of particle physics. But this model is flawed because it does not explain gravity.A theory of everything has to be able to reconcile quantum mechanics with the general theory of relativity. This reconciliation appears to be possible with a theory called “Loop Quantum Gravity” -- or LQG. What is it? The theory of LQG attempts to show that this geometric fabric of space-time is not continuous as Einstein presumed, but is itself quantum, made up of discrete quanta. This is akin to the clothes or sweater you might be wearing right now. Even though it looks smooth from far away, if you looked at it closely, you would see threads, nodes and loops woven together. These are the quanta or bits that your clothing is made of. This is different than every other theory including string theory. Because even in string theory, space is the background or the canvas, on which strings vibrate. In LQG this space-time background is itself quantized . So this means that distance has a minimum quantity about equivalent to the plank length or 10 to the -33 cm. Similarly, area has a minimum value of 10 to the -66 cm squared, and volume has a minimum value of 10 to the -99 cm cubed - below which it cannot go. This is super tiny. LQG says that there are about 10 to the 99 quanta of volume in every cubic centimeter of space. This quantum of volume is so tiny that there are more such quanta in a cubic centimeter than there are cubic centimeters in the entire visible universe -- (10 to the 85) And Time itself has a minimum quantity as well which is 10 to the -43 seconds or close to plank time. And what do these space-time quanta look like? They are like loops. The nodes that intersect is where the quanta volumes of space reside. It has a volume that is a multiple of the plank volume 10 to the -99 cubic centimeters. The loo