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arXiv 0806.1810math-phmath.MP
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配对哈密顿量的量子不变量

Quantum Invariants of the Pairing Hamiltonian

Y. Pehlivan

摘要:

轨道相关配对问题的量子不变量被确定在轨道退化的极限。这些量子不变量的同时对角化的帮助下的Bethe animals方法和对称性,在他们的光谱相关的本征值对应于不同数量的对进行了讨论。这些量子不变量类似于公知的有理Gaudin磁体哈密顿量,其在约化配对情况下起相同的作用(即,具有非简并能级的轨道独立配对)。指出虽然约化对和退化情况是相反的,但这两种情况下不变算子的Bethe反对角化都是基于有理Gaudin代数所描述的相同代数结构.

英文摘要:

Quantum invariants of the orbit dependent pairing problem are identified in the limit where the orbits become degenerate. These quantum invariants are simultaneously diagonalized with the help of the Bethe ansatz method and a symmetry in their spectra relating the eigenvalues corresponding to different number of pairs is discussed. These quantum invariants are analogous to the well known rational Gaudin magnet Hamiltonians which play the same role in the reduced pairing case (i.e., orbit independent pairing with non degenerate energy levels). It is pointed out that although the reduced pairing and the degenerate cases are opposite of each other, the Bethe ansatz diagonalization of the invariant operators in both cases are based on the same algebraic structure described by the rational Gaudin algebra.

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