A variational method based on weighted graph states

Anders, Simon; Briegel, Hans J.; Dür, Wolfgang

A variational method based on weighted graph states

Authors

Anders, Simon

Briegel, Hans J.

Dür, Wolfgang

Description

In a recent article [Phys. Rev. Lett. 97 (2006), 107206], we have presented a class of states which is suitable as a variational set to find ground states in spin systems of arbitrary spatial dimension and with long-range entanglement. Here, we continue the exposition of our technique, extend from spin 1/2 to higher spins and use the boson Hubbard model as a non-trivial example to demonstrate our scheme.
36 pages, 13 figures