Quantum gravity
Table of Contents
- Dropbox/study/loop-quantum-gravity qg
- http://math.ucr.edu/home/baez/spacetime_from_spin/ qg
- Very cool and insightful seminar notes (the categorical diagrams bit) http://math.ucr.edu/home/baez/QG.html qg
- http://math.ucr.edu/home/baez/nth_quantization.html qg
- STRT [B] loop quantum gravity?.. qgsim
- [B] (23) Quantum Spin Dynamics in Loop Quantum Gravity - YouTube qg
- [B] (23) Quantum Gravity Test simulation/ 3D Quantum hall (Triangular Heisenberg lattice system ) - YouTube qg
- think about loop quantum gravity and faster simulations! (baez) qg
- related qggravityquantum
- TODO [D] This is a nontechnical introduction to recent work on quantum gravity using ideas from higher-dimensional algebra qg
¶http://math.ucr.edu/home/baez/spacetime_from_spin/ qg
pdf downloaded
¶Very cool and insightful seminar notes (the categorical diagrams bit) http://math.ucr.edu/home/baez/QG.html qg
¶STRT [B] loop quantum gravity?.. qgsim
CREATED: [2018-08-09]
¶ https://github.com/joeydumont/wignerSymbols qgsim
It reimplements the algorithm designed by Schulten and Gordon in C++, but also contains the original Fortran implementation.
¶ ok, so this is the interesting bit http://www.math.ucr.edu/home/baez/planck/node4.html qgsim
computing transition amplitudes for a certain cobordism between two space states
They only happen because of the carefully chosen recipe for computing amplitudes for spacetime geometries. This recipe is the real core of the whole construction. Sadly, it is a bit too technical to describe here, so the reader will have to turn elsewhere for details [19,30]. I can say this, though: the reason this recipe works so well is that it neatly combines ideas from general relativity, quantum field theory, and a third subject that might at first seem unrelated – higher-dimensional algebra.