CORE Technology and Exact Hamiltonian Real-Space Renormalization Group Transformations
نویسندگان
چکیده
The COntractor REnormalization group (CORE) method, a new approach to solving Hamiltonian lattice systems, is presented. The method defines a systematic and nonperturbative means of implementing KadanoffWilson real-space renormalization group transformations using cluster expansion and contraction techniques. We illustrate the approach and demonstrate its effectiveness using scalar field theory, the Heisenberg antiferromagnetic chain, and the anisotropic Ising chain. Future applications to the Hubbard and t-J models and lattice gauge theory are discussed. Submitted to Physical Review D. *This work was supported by the U. S. DOE, Contract No. DE-AC03-76SF00515 and Grant DE-FG03-90ER40546, and the UK PPARC through grant GR/J 21347.
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