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Upper bound on the free energy of the spin 1/2 Heisenberg ferromagnet

✍ Scribed by Joseph G. Conlon; Jan Philip Solovej

Publisher
Springer
Year
1991
Tongue
English
Weight
310 KB
Volume
23
Category
Article
ISSN
0377-9017

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## Abstract The results of the drone‐fermion representation (DFR) in application to the Heisenberg ferromagnet with spin 1/2 are compared with the corresponding results obtained by means of Pauli operators. The expressions calculated in DFR by Spencer for the perturbational expansion of the one‐par