Hi, Vipin,
On Fri, Jun 18, 2010 at 7:22 PM, Vipin Varma varma@th.physik.uni-bonn.de wrote:
Thanks for the reply; so I guess I should consider chains with odd number of sites (whether for spin-1/2 or spin-1 chains) to calculate the corresponding topological excitations. Is this correct?
No. You should think Sz_total=1 subspace as 2-spinon excited states. 2-spinon excited states are what experimentally observed (from e.g. neutron).
Best regards,