Bohr-Sommerfeld Quantization of Spin Hamiltonians
Anupam Garg, Michael Stone
The Bohr-Sommerfeld rule for a spin system is obtained, including the first quantum corrections. The rule applies to both integer and half-integer spin. It is tested for various models, in particular, the Lipkin-Meshkov-Glick model, and found to agree very well with exact results.
arXiv:cond-mat/0304125•Physical Review Letters•Jan 8, 2004•23 citations