Title of article :
Excitation gap of an antiferromagnetic Heisenberg chain with multiple decorations
Author/Authors :
H. Asakawa، نويسنده ,
Issue Information :
روزنامه با شماره پیاپی سال 2000
Abstract :
A one-dimensional spin- antiferromagnetic Heisenberg model with multiple decorations is introduced. The low-lying properties of the decorated quantum spin chain are discussed. In the continuum and semiclassical limit of the present model, the non-linear sigma model with a topological term is derived and the conjecture for the low-lying state is proposed. Validity of the conjecture seems to be supported by the perturbational expansions and by the density matrix renormalization group calculations.
Journal title :
Physica A Statistical Mechanics and its Applications
Journal title :
Physica A Statistical Mechanics and its Applications