ENCORE: An extended contractor renormalization algorithm.
- Albuquerque AF Theoretische Physik, ETH Zurich, 8093 Zurich, Switzerland.
- Katzgraber HG
- Troyer M
- 2009-06-13
Published in:
- Physical review. E, Statistical, nonlinear, and soft matter physics. - 2009
English
Contractor renormalization (CORE) is a real-space renormalization-group method to derive effective Hamiltionians for microscopic models. The original CORE method is based on a real-space decomposition of the lattice into small blocks and the effective degrees of freedom on the lattice are tensor products of those on the small blocks. We present an extension of the CORE method that overcomes this restriction. Our generalization allows the application of CORE to derive arbitrary effective models whose Hilbert space is not just a tensor product of local degrees of freedom. The method is especially well suited to search for microscopic models to emulate low-energy exotic models and can guide the design of quantum devices.
- Language
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- English
- Open access status
- green
- Identifiers
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- DOI 10.1103/PhysRevE.79.046712
- PMID 19518385
- Persistent URL
- https://sonar.ch/global/documents/47318
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