2012/09/30 by Christina Pöltl, Clive Emary, Tobias Brandes
Computer Science · Physics and Astronomy · #Quantum Computing Algorithms and Architecture #Quantum Information and Cryptography #Quantum and electron transport phenomena #cond-mat.mes-hall
paper · pdf · doi:10.1103/physrevb.87.045416
published as Phys. Rev. B 87, 045416 (2013) · 9 pages and 3 figures
openalex publication_date 2013/01/14 · arxiv created 2013/01/23 · arxiv updated 2013/01/25 · openalex created_date 2016/06/24 · openalex updated_date 2026/07/28
We present a transport setup of coupled quantum dots that enables the creation of spatially separated spin-entangled two-electron dark states. We prove the existence of an entangled transport dark state by investigating the system Hamiltonian without coupling to the electronic reservoirs. In the transport regime, the entangled dark state, which corresponds to a singlet, has a strongly enhanced Fano factor compared to the dark state, which corresponds to a mixture of the triplet states. Furthermore, we calculate the concurrence of the occupying electrons to show the degree of entanglement in the transport regime.