Eigenvalue relation of the Heisenberg chain with various boundary conditions for the ground state

演讲人: 杨文力 西北大学
时间: 2025-04-16 16:00-2025-04-16 17:00
地点:FIT 1-222
内容:

We propose a new parametrization of the eigenvalues of transfer matrix in a quantum integrable model. Based on it, we obtain the exact solution of the system. By studying the distribution of zero roots at the ground state, we obtain the explicit expressions of the eigenfunctions of the transfer matrix and the associated $\mathbb{W}$ operator in the thermodynamic limit. We find that the ratio of the quantum determinant with the eigenvalue of $\mathbb{W}$ operator for the ground state exhibits exponential decay behavior. Thus this fact ensures that the so-called {\it inversion relation} (the $t-W$ relation without the $W$-term) can be used to study the ground state properties of quantum integrable systems with/without $U(1)$-symmetry in the thermodynamic limit.

个人简介:

杨文力,西北大学物理学院教授、博士生导师、物理学院院长。1990年本科毕业于西安交通大学,1996年于西北大学获得博士学位,曾在德国波恩大学、日本京都大学、澳大利亚昆士兰大学等访问工作。主要从事经典和量子场论、量子可积系统及相关对称代数等数学物理领域的研究。2009年入选陕西省“百人计划”,2014年获得国家杰出青年基金资助,2015年入选教育部长江特聘教授。其成果曾获2010年度教育部自然科学二等奖,2012年度陕西省科学技术一等奖。