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- Eötvös Loránd UniversityHU320 papers
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- California Institute of TechnologyUS194 papers
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7 papers · 1 filter
Boundary critical behaviour of two-dimensional random Ising models
F. Igloi, P. Lajko, W. Selke +1
Using Monte Carlo techniques and a star-triangle transformation, Ising models with random, 'strong' and 'weak', nearest-neighbour ferromagnetic couplings on a square lattice with a…
Density Profiles, Casimir Amplitudes and Critical Exponents in the Two Dimensional Potts Model: A Density Matrix Renormalization Study
Enrico Carlon, Ferenc Igloi
We use the density matrix renormalization group (DMRG) to perform a detailed study of the critical properties of the two dimensional Q state Potts model, including the magnetizatio…
The Random Transverse Ising Spin Chain and Random Walks
F. Igloi, H. Rieger
We study the critical and off-critical (Griffiths-McCoy) regions of the random transverse-field Ising spin chain by analytical and numerical methods and by phenomenological scaling…
Exact Renormalization-Group Study of Aperiodic Ising Quantum Chains and Directed Walks
F. Igloi, L. Turban, D. Karevski +1
We consider the Ising model and the directed walk on two-dimensional layered lattices and show that the two problems are inherently related: The zero-field thermodynamical properti…
Ghost Systems: A Vertex Algebra Point of View
W. Eholzer, L. Feher, A. Honecker
Fermionic and bosonic ghost systems are defined each in terms of a single vertex algebra which admits a one-parameter family of conformal structures. The observation that these str…
Surface critical behavior of two-dimensional dilute Ising models
W. Selke, F. Szalma, P. Lajko +1
Ising models with nearest-neighbor ferromagnetic random couplings on a square lattice with a (1,1) surface are studied, using Monte Carlo techniques and star-tiangle transformation…