Quantum spherical spin models

Details Quantum spherical spin models Quantum spherical spin models

2003-04-07

arxiv.org/abs/cond-mat/0304150v3

Physics

Condensed Matter

22 pages

Scientific paper

10.1103/PhysRevE.69.056119

A recently introduced class of quantum spherical spin models is considered in detail. Since the spherical constraint already contains a kinetic part, the Hamiltonian need not have kinetic term. As a consequence, situations with or without momenta in the Hamiltonian can be described, which may lead to different symmetry classes. Two models that show this difference are analyzed. Both models are exactly solvable and their phase diagram is analyzed. A transversal external field leads to a phase transition line that ends in a quantum critical point. The two considered symmetries of the Hamiltonian considered give different critical phenomena in the quantum critical region. The model with momenta is argued to be analog to the large-N limit of an SU(N) Heisenberg ferromagnet, and the model without momenta shares the critical phenomena of an SU(N) Heisenberg antiferromagnet.

Affiliated with

Also associated with

No associations

Rating

Quantum spherical spin models does not yet have a rating. At this time, there are no reviews or comments for this scientific paper.

If you have personal experience with Quantum spherical spin models, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Quantum spherical spin models will most certainly appreciate the feedback.

Rate now

Comments { 0 }

Profile ID: LFWR-SCP-O-521613