Many-body density matrices for free fermions

• Main Authors: Henley, Christopher L., Cheong, Siew Ann
• 格式: Article
• 語言: English
• 出版: 2009
• 主題: DRNTU::Science::Physics::Atomic physics::Solid state physics
• 在線閱讀: https://hdl.handle.net/10356/90932; http://hdl.handle.net/10220/4593

Building upon an analytical technique introduced by Chung and Peschel [Phys. Rev. B 64, 064412 (2001)], we calculated the many-body density matrix ρB of a finite block of B sites within an infinite system of free spinless fermions in arbitrary dimensions. In terms of the block Green function matrix...