SO(4) Symmetry of the Transfer Matrix for the One-Dimensional Hubbard Model

Details SO(4) Symmetry of the Transfer Matrix for the One-Dimensional Hubbard Model SO(4) Symmetry of the Transfer Matrix for the One-Dimensional Hubbard Model

1997-08-07

arxiv.org/abs/cond-mat/9708064v1

J. Phys. A: Math. Gen. 31 (1998) 2341-2358

Physics

Condensed Matter

Statistical Mechanics

20 pages, LaTeX file using citesort.sty

Scientific paper

10.1088/0305-4470/31/10/010

The SO(4) invariance of the transfer matrix for the one-dimensional Hubbard model is clarified from the QISM (quantum inverse scattering method) point of view. We demonstrate the SO(4) symmetry by means of the fermionic R-matrix, which satisfy the graded Yang-Baxter relation. The transformation law of the fermionic L-operator under the SO(4) rotation is identified with a kind of gauge transformation, which determines the corresponding transformation of the fermionic creation and annihilation operators under the SO(4) rotation. The transfer matrix is confirmed to be invariant under the SO(4) rotation, which ensures the SO(4) invariance of the conserved currents including the Hamiltonian. Furthermore, we show that the representation of the higher conserved currents in terms of the Clifford algebra gives manifestly SO(4) invariant forms.

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