Lattice Hamiltonian approach to the Schwinger model:further results from the strong coupling expansion

Szyniszewski, Marcin and Cichy, Krzysztof and Kujawa-Cichy, Agnieszka (2014) Lattice Hamiltonian approach to the Schwinger model:further results from the strong coupling expansion. In: LATTICE 2014. Prceedings of Science, USA.

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Abstract

We employ exact diagonalization with strong coupling expansion to the massless and massive Schwinger model. New results are presented for the ground state energy and scalar mass gap in the massless model, which improve the precision to nearly 10^-9 %. We also investigate the chiral condensate and compare our calculations to previous results available in the literature. Oscillations of the chiral condensate which are present while increasing the expansion order are also studied and are shown to be directly linked to the presence of flux loops in the system.

Item Type:
Contribution in Book/Report/Proceedings
Additional Information:
7 pages, 6 figures, to appear in PoS(Lattice 2014)314
Subjects:
ID Code:
75742
Deposited By:
Deposited On:
28 Sep 2015 11:06
Refereed?:
Yes
Published?:
Published
Last Modified:
27 Nov 2020 09:16