Phys. Rev. Lett. 96, 240403 (2006) [4 pages]Proposal of an Experimentally Accessible Measure of Many-Fermion EntanglementReceived 25 November 2005; published 23 June 2006 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. © 2006 The American Physical Society URL:
http://link.aps.org/doi/10.1103/PhysRevLett.96.240403
DOI:
10.1103/PhysRevLett.96.240403
PACS:
05.30.Fk, 03.67.Mn, 72.70.+m, 73.63.−b
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