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A new boson realization of the two-level pairing model in a many-fermion system and its classical counterpart - The role of the su(2) circle times su(1,1)-coherent state in the Schwinger boson representation of the su(2) circle times su(2)-algebra

Authors: C. PROVIDÊNCIA, J. DA PROVIDÊNCIA, Y. TSUE and M. YAMAMURA

Ref.: Prog. Theor. Phys. 115, 739-757 (2006)