Entanglement renormalization, scale invariance, and quantum criticality
arXiv:0810.0580 · doi:10.1103/PhysRevA.79.040301
Abstract
The use of entanglement renormalization in the presence of scale invariance is investigated. We explain how to compute an accurate approximation of the critical ground state of a lattice model, and how to evaluate local observables, correlators and critical exponents. Our results unveil a precise connection between the multi-scale entanglement renormalization ansatz (MERA) and conformal field theory (CFT). Given a critical Hamiltonian on the lattice, this connection can be exploited to extract most of the conformal data of the CFT that describes the model in the continuum limit.
4 pages, 3 figures, RevTeX 4. Revised for greater clarity