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Phys Rev Lett. 2004 Jan 16;92(2):026805. Epub 2004 Jan 15.

Two-particle Aharonov-Bohm effect and entanglement in the electronic Hanbury Brown-Twiss setup.

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  • 1Département de Physique Théorique, Université de Genève, CH-1211 Genève 4, Switzerland.


We analyze a Hanbury Brown-Twiss geometry in which particles are injected from two independent sources into a mesoscopic conductor in the quantum Hall regime. All partial waves end in different reservoirs without generating any single-particle interference; in particular, there is no single-particle Aharonov-Bohm effect. However, exchange effects lead to two-particle Aharonov-Bohm oscillations in the zero-frequency current cross correlations. We demonstrate that this is related to two-particle orbital entanglement, detected via violation of a Bell inequality. The transport is along edge states and only adiabatic quantum point contacts and normal reservoirs are employed.

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