Two-particle Aharonov-Bohm effect and entanglement in the electronic Hanbury Brown-Twiss setup.
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.
Samuelsson
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Département de Physique Théorique, Université de Genève, CH-1211 Genève 4, Switzerland.
Sukhorukov
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Büttiker
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