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14 papers · 1 filter
Functional Integral Approach to the N-Flavor Schwinger Model
Christof Gattringer, Erhard Seiler
We study massless QED_2 with N flavors using path integrals. We identify the sector that is generated by the N^2 classically conserved vector currents. One of them (the U(1) curren…
Calculating excitation energies with the help of cumulants
T. Schork, P. Fulde
Recently, it has been shown that the ground-state energy of a quantum many-body system can be written in terms of cumulants. In this paper we show that the energies of excited stat…
Polaronic Self-Localization Effects in the Three Band Peierls Hubbard Model
A. Dobry, A. Greco, J. Lorenzana +1
We have studied the three-band Peierls-Hubbard model describing the Cu-O layers in high-T superconductors by using Lanczos diagonalization and assuming infinite mass for the io…
A Precise Determination of the Running Coupling in the SU(3) Yang-Mills Theory
Martin Luescher, Rainer Sommer, Peter Weisz +1
A non-perturbative finite-size scaling technique is used to study the evolution of the running coupling (in a certain adapted scheme) in the SU(3) Yang-Mills theory. At low energie…
Mirror Symmetry, Mirror Map and Applications to Calabi-Yau Hypersurfaces
S. Hosono, A. Klemm, S. Theisen +1
Mirror Symmetry, Picard-Fuchs equations and instanton corrected Yukawa couplings are discussed within the framework of toric geometry. It allows to establish mirror symmetry of Cal…
Finite size scaling analysis of intermittency moments in the two dimensional Ising model
Z. Burda, K. Zalewski, R. Peschanski +1
Finite size scaling is shown to work very well for the block variables used in intermittency studies on a 2-d Ising lattice. The intermittency exponents so derived exhibit the expe…