Quantum Gravity Quotes

“String theory makes sense to me because the universe is a symphony that creates harmony with the vibration of our strings.”
― Kamand Kojouri

“Change is ubiquitous. Only: elementary processes cannot be ordered along a common succession of instants. At the extremely small scale of the quanta of space, the dance of nature does not develop to the rhythm kept by the baton of a single orchestral conductor: every process dances independently with its neighbours, following its own rhythm. The passing of time is intrinsic to the world, it is born of the world itself, out of the relations between quantum events which are the world and which themselves generate their own time.”
― Carlo Rovelli, La realtà non è come ci appare: La struttura elementare delle cose

“The resulting, stable singularities now carry the name BKL in honor of Belinsky, Khalatnikov, and Lifshitz. A BKL singularity is chaotic. Highly chaotic. And lethal. Highly lethal.”
― Kip S. Thorne, The Science of Interstellar

“General relativity and quantum mechanics are in the end not as incompatible as they seemed. On closer inspection, they shake hands and engage in a beautiful dialogue. The spatial relations that weave Einstein's curved space are the very interactions weaving the relations between the systems of quantum mechanics. The two become compatible and conjoined, two sides of the same coin, as soon as it is recognized that space and time are aspects of a quantum field, and quantum fields can exist without being grounded in an external space.”
― Carlo Rovelli, La realtà non è come ci appare: La struttura elementare delle cose

“.... the world is made entirely from quantum fields. These fields do not live *in* spacetime; they live, so to speak, one on top of the other: fields on fields. The space and time that we perceiv in large scale are our blurred and approximage image of one of these quantum fields: the gravitational field (193).”
― Carlo Rovelli, La realtà non è come ci appare: La struttura elementare delle cose

“[T]he elementary form of the mechanics of the world...does not need to mention 'time.' The world without a time variable is not a complicated one. It's a net of interconnected events, where the variables in play adhere to probabilistic rules that, incredibly, we know for a good part how to write. And it's a clear world, windswept and full of beauty as the crests of mountains; aridly beautiful as the cracked lips of the adolescent you loved.”
― Carlo Rovelli

“Some people, including Hawking, think that we may be able to understand the big bang or the big crunch (in particular, whether time has a beginning or an end at these events) when we have a satisfactory quantum theory of gravitation.”
― Jamal Nazrul Islam, The Ultimate Fate of the Universe