47 citations · 66 across the 5 of their papers we have counts for
5 papers
Lattice statistical models for the nematic transitions in liquid-crystalline systems
E. S. Nascimento, A. P. Vieira, S. R. Salinas
We investigate the connections between some simple Maier-Saupe lattice models, with a discrete choice of orientations of the microscopic directors, and a recent proposal of a two-t…
Microstructure identification via detrended fluctuation analysis of ultrasound signals
Paulo G. Normando, Romao S. Nascimento, Elineudo P. Moura +1
We describe an algorithm for simulating ultrasound propagation in random one-dimensional media, mimicking different microstructures by choosing physical properties such as domain s…
Fatigue in disordered media
Cláudio L. N. Oliveira, André P. Vieira, Hans J. Herrmann +1
We obtain the Paris law of fatigue crack propagation in a disordered solid using a fuse network model where the accumulated damage in each resistor increases with time as a power l…
Low-energy properties of aperiodic quantum spin chains
André P. Vieira
We investigate the low-energy properties of antiferromagnetic quantum XXZ spin chains with couplings following two-letter aperiodic sequences, by an adaptation of the Ma-Dasgupta-H…
The one-dimensional XXZ model with long-range interactions
L. L. Goncalves, A. P. Vieira, L. P. S. Coutinho
The one-dimensional XXZ model (s=1/2, N sites) with uniform long-range interactions among the transverse components of the spins is considered. The Hamiltonian of the model is expl…