Proposal of an experimentally accessible measure of many-fermion entanglement

Details Proposal of an experimentally accessible measure of many-fermion entanglement Proposal of an experimentally accessible measure of many-fermion entanglement

2005-11-22

arxiv.org/abs/quant-ph/0511222v2

Phys. Rev. Lett. 96, 240403 (2006)

Physics

Quantum Physics

5 pages, 3 figures, published version

Scientific paper

10.1103/PhysRevLett.96.240403

We propose a measure of interaction-induced ground state entanglement in many-fermion systems that is experimentally accessible. 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 and it is related to measures of occupation number entanglement. We evaluate it for two examples of interacting electronic nanostructures.

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