Frustrated spin systems have been first investigated five decades ago. Well-known examples include the Ising model on the antiferromagnetic triangular lattice studied by G H Wannier in 1950 and the Heisenberg helical structure discovered independently by A Yoshimori, J Villain a…
Correlation and localization
by Surjan, Peter R., Bartlett, Rodney J.
fromTopics in current chemistry
This volume contains review and research articles in one particular area of quantum chemical methodology: the theory of electron correlation and the localization problem. Correlation energy (i.e., the energy beyond the Hartree-Fock) plays an important role in the theoretical des…
All atomic particles have a particular "spin," analogous to the rotation of the Earth about its axis. Simple as spin may sound, the quantum mechanical reality underlying it is complex and still poorly understood. Yet this mysterious quality and the statistics associated with it …
All atomic particles have a particular "spin." Simple as spin may sound, the quantum mechanical reality underlying it is complex and still poorly understood. Because of the wide range of physics needed for its understanding, spin is not described in sufficient depth by any stand…
The authors compare classical and quantum dynamics in the quasiclassical region of parameters and under the condition of unstable (chaotic) classical behavior. They estimate the characteristic time-scale at which classical and quantum solutions start to differ significantly. The…