Concept record · edition 0.1.0
Disentangler
A unitary applied across block boundaries before coarse-graining, removing short-range entanglement that the isometry would otherwise have to carry to the next layer.
Why it matters
It is the element that distinguishes MERA from a tree tensor network and the reason MERA reaches critical entanglement scaling.
Claims using this concept
Sources
primary paper · identifier verified
Entanglement renormalization
Guifré Vidal · 2005
arXiv:cond-mat/0512165
Introduces entanglement renormalization and the disentangler that distinguishes MERA from a plain tree network.
Source record →primary paper · identifier verified
A class of quantum many-body states that can be efficiently simulated
G. Vidal · 2006
arXiv:quant-ph/0610099
Primary source for the MERA ansatz and its efficient contraction, including the scale-invariant construction.
Source record →