Density Matrix Renormalization Group Approach to the Massive Schwinger Model

Details Density Matrix Renormalization Group Approach to the Massive Schwinger Model Density Matrix Renormalization Group Approach to the Massive Schwinger Model

2002-01-07

arxiv.org/abs/hep-lat/0201007v1

Nucl.Phys.Proc.Suppl. 109A (2002) 202-206

Physics

High Energy Physics

High Energy Physics - Lattice

7 pages, 6 figures, submitted to PRL

Scientific paper

10.1016/S0920-5632(02)01416-0

The massive Schwinger model is studied, using a density matrix renormalization group approach to the staggered lattice Hamiltonian version of the model. Lattice sizes up to 256 sites are calculated, and the estimates in the continuum limit are almost two orders of magnitude more accurate than previous calculations. Coleman's picture of `half-asymptotic' particles at background field (theta = pi) is confirmed. The predicted phase transition at finite fermion mass (m/g) is accurately located, and demonstrated to belong in the 2D Ising universality class.

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