2005/11/30 by Markus Kindermann, M. Kindermann
Physics and Astronomy · #Quantum and electron transport phenomena #Quantum many-body systems #Topological Materials and Phenomena #astro-ph #cond-mat.mes-hall #quant-ph
paper · pdf · doi:10.1103/physrevlett.96.240403
published as Phys. Rev. Lett. 96, 240403 (2006) · 5 pages, 3 figures, published version
openalex publication_date 2006/06/23 · arxiv created 2006/06/29 · arxiv updated 2009/12/01 · openalex created_date 2025/10/10 · openalex updated_date 2026/07/28
We propose an experimentally accessible measure of entanglement in many-fermion systems that characterizes interaction-induced ground state correlations. It is formulated in terms of cross correlations of currents through resonant fermion levels weakly coupled to the probed system. The proposed entanglement measure vanishes in the absence of many-body interactions at zero temperature and it is related to measures of occupation number entanglement. We evaluate it for two examples of interacting electronic nanostructures.