Tensor Network Renormalisation
This contains some MATLAB scripts to perform the Tensor Network Renormalisation (TNR) algorithm. This is for a "Quantum Coffee" talk given at MPQ on the 17/03/2016. The algorithm was introduced by G. Evenbly and G. Vidal in the paper
G. Evenbly and G. Vidal, Phys. Rev. Lett. 115, 180405 (2015) http://dx.doi.org/10.1103/PhysRevLett.115.180405
but the code is based on:
G. Evenbly, arXiv:1509.07484 http://arxiv.org/abs/1509.07484
Additional functions required to run the scripts here are:
ncon: R. N. C. Pfeifer, G. Evenbly, S. Singh, G. Vidal, arXiv:1402.0939. http://arxiv.org/abs/1402.0939
netcon: R. N. C. Pfeifer, J. Haegeman, F. Verstraete, arXiv:1304.6112. http://arxiv.org/abs/1304.6112
Both of which can be downloaded by selecting "other formats" and "download source" on arXiv.
Please note that this code is meant for illustrative purposes only and there is also a bug in it somewhere.