多体开放量子系统的密度矩阵重整化群方法

Density matrix renormalization group approach for many-body open quantum systems.

作者信息

Rotureau J, Michel N, Nazarewicz W, Płoszajczak M, Dukelsky J

机构信息

Department of Physics and Astronomy, University of Tennessee, Knoxville, Tennessee 37996, USA.

出版信息

Phys Rev Lett. 2006 Sep 15;97(11):110603. doi: 10.1103/PhysRevLett.97.110603. Epub 2006 Sep 13.

DOI:10.1103/PhysRevLett.97.110603

PMID:17025874

Abstract

The density matrix renormalization group (DMRG) approach is extended to complex-symmetric density matrices characteristic of many-body open quantum systems. Within the continuum shell model, we investigate the interplay between many-body configuration interaction and coupling to open channels in case of the unbound nucleus (7)He. It is shown that the extended DMRG procedure provides a highly accurate treatment of the coupling to the nonresonant scattering continuum.

摘要

密度矩阵重整化群（DMRG）方法被扩展到多体开放量子系统所特有的复对称密度矩阵。在连续壳模型中，我们研究了无束缚核(^7)He情况下多体组态相互作用与开放通道耦合之间的相互作用。结果表明，扩展的DMRG程序能够对与非共振散射连续体的耦合进行高度精确的处理。