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cond-mat.stat-mech2005
Non-linear sigma model approach to quantum spin chains
Sumathi Rao
We introduce and motivate the study of quantum spin chains on a one-dimensional lattice. We classify the varieties of methods that have been used to study these models into three c…
cond-mat.stat-mech1998★ 1 cited
Exactly Solvable Fermionic N-chain Models
Ranjan Kumar Ghosh, P. K. Mohanty, Sumathi Rao
Motivated by the problem of N coupled Hubbard chains, we investigate a generalisation of the Schulz-Shastry model containing two species of one-dimensional fermions interacting via…