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179.694  Articles
1 of 17.970 pages  |  10  records  |  more records»
The equilibrium magnetic and entanglement properties in a spin-1/2 Ising-Heisenberg model on a triangulated Kagomé lattice are analyzed by means of the effective field for the Gibbs-Bogoliubov inequality. The calculation is reduced to decoupled individual... see more

We study magnetic properties of ordered phase in Heisenberg model on a non-Bravais lattice by means of Popov - Fedotov trick, which takes into account a rigorous constraint of a single occupancy. We derive magnetization and free energy using sadle point a... see more

In this paper the Ising model is modified by considering its parameters as a vector that depends on the neighborhoods of the image's pixels. We applied this modification for generating binary images, provided the original image is given. An example is exp... see more

This work uses Fuzzy Sets Theory to develop analytical tools in order to guide the construction of the fuzzy phase diagram associated to the one-dimensional spin-1/2 Ising model subject to an external magnetic field, taking into account uncertainties pres... see more

Aproksimasi Bragg-Williams pada model Ising 2D material feromagnetik disajikan dalam makalah ini berdasarkan tinjauan mekanika statistik. Mekanika statistik menjelaskan fenomena fisika pada skala makroskopik ditinjau dari bentuk interaksi materi penyusun ... see more

We study the magnetic ordered phases of the spin -12-\frac{1}{2} Heisenberg antiferromagnetic model with nearest J1J_1 and next nearest neighbor J2J_2 exchange interactions on the square lattice using fermionic representation of spin operators within Pop... see more

Consideramos duas maneiras distintas de introduzir graus de liberdade de natureza elástica no modelo de Ising unidimensional. Levando em conta apenas o efeito médio das vibrações elásticas, o hamiltoniano efetivo de spin no ensemble das pressões apresenta... see more

This paper deals with the application of operatorial techniques of quantum physics to a theoretical model of closed ecosystems. The model is built by using fermionic operators whose evolution is ruled by a self--adjoint Hamiltonian operator. Adopting Heis... see more

The Heisenberg Lie Group is the most frequently used model for studying the representation theory of Lie groups. This Lie group is modular-noncompact and its Lie algebra is nilpotent. The elements of Heisenberg Lie group and algebra  can be expressed... see more

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