ITensor/library — Issue #31: Reimplement pairTie more efficiently
Author: emstoudenmire
Created: 2011-10-11 19:57:34+00:00
State: open
Labels: Optimization, Redesign

The pairTie function uses Kronecker delta type ITensors internally. This means that contracting product loops over many elements that are just set to zero. Replacing these ITensors with explicit sums over the Indices to be tied together should be much more efficient.