arXiv subjects

Susanta Bhattacharya

Publications and source records attributed to Susanta Bhattacharya.

2 recordsLinked to original sources

arXiv2003

Ising Model on periodic and quasi-periodic chains in presence of magnetic field: some exact results

We present a general procedure for calculating the exact partition function of an Ising model on a periodic chain in presence of magnetic field considering both open and closed boundary conditions. Using same procedure on a quasiperiodic (Fibonacci) chain we have established a recurrence relation among partition functions of different Fibonacci generations from n-th to (n+6)-th. In the large N limit we find $(2τ+ 1){F_{n+1}}={F_{n+2}}$; where $τ$ is the golden mean and $F_n$ stands for free energy/spin for the n-th generation. We have also studied chemical potential in both cases.

cond-mat.stat-mech↗

arXiv2001

Ising Model On A Fibonacci Lattice with Magnetic Field

We represent a general procedure for calculating the partition function of an Ising model on a one dimensional Fibonacci lattice in presence of magnetic field.This partition function can be written as a sum of partition functions of usual open Ising chains in presence of magnetic field with coefficients having Fibonacci symmetries.An exact expression for the partition function of the usual open Ising model is found.We observe that "Mirror Symmetry" is a characteristic property of all Fibonacci generations.Further nth and (n+6)th generations have the same topology.We have also established a recurrence relation among partition functions of different Fibonacci generations from nth to (n+6)th.

cond-mat.stat-mech↗