# Table of Contents

-   [Dropbox/study/loop-quantum-gravity](#drpbxstdylpqntmgrvty) 
    -   [acm.pdf thing – poses problem for computer scientists](#cmpdfthngpssprblmfrcmptrscntsts) 
-   [http://math.ucr.edu/home/baez/spacetime\_from\_spin/](#mthcrdhmbzspctmfrmspn) 
-   [Very cool and insightful seminar notes (the categorical diagrams bit) http://math.ucr.edu/home/baez/QG.html](#vryclndnsghtflsmnrntsthctcldgrmsbtmthcrdhmbzqghtml) 
-   [http://math.ucr.edu/home/baez/nth\_quantization.html](#mthcrdhmbznthqntztnhtml) 
-   [loop quantum gravity?..](#lpqntmgrvty) [[sim]]
    -   [`[2018-10-30]`  https://github.com/joeydumont/wignerSymbols](#sgthbcmjydmntwgnrsymbls) 
    -   [`[2018-10-30]`  ok, so this is the interesting bit http://www.math.ucr.edu/home/baez/planck/node4.html](#ksthssthntrstngbtwwwmthcrdhmbzplnckndhtml) 
-   [`[2018-08-10]` (23) Quantum Spin Dynamics in Loop Quantum Gravity - YouTube](#qntmspndynmcsnlpqntmgrvtyytb) 
-   [`[2018-08-10]` (23) Quantum Gravity Test simulation/ 3D Quantum hall (Triangular Heisenberg lattice system ) - YouTube](#qntmgrvtytstsmltndqntmhlltrnglrhsnbrglttcsystmytb) 
-   [think about loop quantum gravity and faster simulations! (baez)](#thnkbtlpqntmgrvtyndfstrsmltnsbz) 
-   [related](#rltd) [[gravity]] [[quantum]]
-   [`[2018-10-30]` This is a nontechnical introduction to recent work on quantum gravity using ideas from higher-dimensional algebra](#thssnntchnclntrdctntrcntwvtysngdsfrmhghrdmnsnllgbr) 





# Dropbox/study/loop-quantum-gravity 





## acm.pdf thing – poses problem for computer scientists




# <http://math.ucr.edu/home/baez/spacetime_from_spin/> 

pdf downloaded  




# Very cool and insightful seminar notes (the categorical diagrams bit) <http://math.ucr.edu/home/baez/QG.html>




# <http://math.ucr.edu/home/baez/nth_quantization.html> 




# loop quantum gravity?..      [[sim]]





## `[2018-10-30]`  <https://github.com/joeydumont/wignerSymbols>

    It reimplements the algorithm designed by Schulten and Gordon in C++, but also contains the original Fortran implementation.

<https://github.com/Jutho/WignerSymbols.jl>  




## `[2018-10-30]`  ok, so this is the interesting bit <http://www.math.ucr.edu/home/baez/planck/node4.html>

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 &#x2013; higher-dimensional algebra.  




# `[2018-08-10]` (23) Quantum Spin Dynamics in Loop Quantum Gravity - YouTube

<https://www.youtube.com/watch?v=26PIHRRHGTo>  




# `[2018-08-10]` (23) Quantum Gravity Test simulation/ 3D Quantum hall (Triangular Heisenberg lattice system ) - YouTube

<https://www.youtube.com/watch?v=lF6GqQ5QrJE>  




# think about loop quantum gravity and faster simulations! (baez)




# related       [[gravity]] [[quantum]]




# `[2018-10-30]` This is a nontechnical introduction to recent work on quantum gravity using ideas from higher-dimensional algebra

<http://www.math.ucr.edu/home/baez/planck/planck.html>