Spin Inequality for Energy Computation of Heisenberg Spin Hamiltonian

Debnarayan Jana

Dept. of Physics, University of Calcutta

In this paper, we will use a simple spin inequality to compute the ground state energy of nearest neighbour Heisenberg Hamiltonian in one di- mension. The implication of this inequality will be highlighted in the thermodynamic properties also. Finally, the utility of this technique is illustrated in Majumdar-Ghosh model.