The anisotropic magnetic chain in a longitudinal field

The spin-1/2 anisotropic Heisenberg-chain in longitudinal aaand transversal magnetic fields: a DMRG study

Thermodynamics of anisotropic antiferromagnetic Heisenberg chain in the presence of longitudinal magnetic field

Anisotropic antiferromagnetic chain in a magnetic field

Anisotropic Haldane-gap chains in a magnetic field

Perturbed sine-Gordon model: S=1/2 anisotropicxy chain with a longitudinal magnetic field

Isotropic X-Y chain in an inhomogeneous magnetic field