@article{ISI:000088960600019,
 abstract = {We study the equilibrium and dynamical properties of the axial
next-nearest-neighbor Ising chain at the multiphase point. An
interesting property of the system is the macroscopic degeneracy of the
ground state leading to finite zero-temperature entropy. In our
equilibrium study we consider the effect of softening the spins. We show
that the degeneracy of the ground state is lifted and there is a
qualitative change in the low-temperature behavior of the system with a
well-defined low-temperature peak of the specific heat that carries the
thermodynamic `'weight'' of the ground state entropy. In our study of
the dynamical properties, the stochastic Kawasaki dynamics is
considered. The Fokker-Planck operator for the process corresponds to a
quantum spin Hamiltonian similar to the Heisenberg ferromagnet but with
constraints on allowed states. This leads to a number of differences in
its properties, which are obtained through exact numerical
diagonalization, simulations, and by obtaining various analytic bounds.},
 author = {Dhar, A and Shastry, BS and Dasgupta, C},
 doi = {10.1103/PhysRevE.62.1592},
 eissn = {2470-0053},
 issn = {2470-0045},
 journal = {PHYSICAL REVIEW E},
 month = {AUG},
 number = {2, A},
 orcid-numbers = {Dasgupta, Chandan/0000-0002-0302-1881},
 pages = {1592-1600},
 times-cited = {1},
 title = {Equilibrium and dynamical properties of the axial next-nearest-neighbor
Ising chain at the multiphase point},
 unique-id = {ISI:000088960600019},
 volume = {62},
 year = {2000}
}