Journal
PHYSICAL REVIEW B
Volume 83, Issue 7, Pages -Publisher
AMER PHYSICAL SOC
DOI: 10.1103/PhysRevB.83.075122
Keywords
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Funding
- NSF [DMR-0705847]
- Deutsche Forschungsgemeinschaft [SFB 602]
- Office of Science of the U. S. Department of Energy [DE-AC05-00OR22725]
- Division of Scientific User Facilities, U.S. Department of Energy [CNMS2009-219]
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We present a submatrix update algorithm for the continuous-time auxiliary field method that allows the simulation of large lattice and impurity problems. The algorithm takes optimal advantage of modern CPU architectures by consistently using matrix instead of vector operations, resulting in a speedup of a factor of approximate to 8 and thereby allowing access to larger systems and lower temperature. We illustrate the power of our algorithm at the example of a cluster dynamical mean field simulation of the Neel transition in the three-dimensional Hubbard model, where we show momentum dependent self-energies for clusters with up to 100 sites.
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