Spin Transport Properties of the One-Dimensional Heisenberg Chain: Bethe-Ansatz Solution with Twist Boundary Conditions

• 来源期刊: 中国物理快报（英文版）
• 年，卷（期）: 2007,（5）
• 页码范围: 1354-1356
• 页数: 3页
• 语种: 英文

摘要

Based on the Bethe-Ansatz solution of the one-dimensional Heisenberg model under twist boundary conditions, we study the spectra of the persistent current carried by the low-lying excited states. It is shown that though the energy spectra of spin-singlet and spin-triplet excitations are degenerate, their persistent current spectra are quite different.