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cond-mat.stat-mech2018
The ground state-vector of the XY Heisenberg chain and the Gauss decomposition
N. Bogoliubov, C. Malyshev
The XY Heisenberg spin 1/2 chain is considered in the fermion representation. The construction of the ground state-vector is based on the group-theoretical approach. The exact expr…
math-ph2018★ 3 cited
Correlation Functions as Nests of Self-Avoiding Paths
Nikolay M. Bogoliubov, Cyril Malyshev
We discuss connection between the XXZ Heisenberg spin chain in the limiting case of zero anisotropy and some aspects of enumerative combinatorics. The representation of the Bethe w…