2002/12/23 by Chih-Lung Chou, Chih‐Lung Chou, Chou, Chih-Lung
Physics and Astronomy · #FOS: Physical sciences #Magnetic properties of thin films #Quantum Physics (quant-ph) #Quantum and electron transport phenomena #Surface and Thin Film Phenomena #quant-ph
paper · pdf · doi:10.48550/arxiv.quant-ph/0212131
10 pages, 4 figures;monir changes on abstract and content, typos corrected
openalex publication_date 2002/12/23 · arxiv created 2003/02/11 · arxiv updated 2009/12/01 · openalex created_date 2025/10/10 · openalex updated_date 2026/07/28
We consider a three-port single-level quantum dot system with one input and two output leads. Instead of considering an empty dot, we study the situations that two input electrons co-tunnel through the quantum dot occupied by one or two dot electrons. We show that electron entanglement can be generated via the co-tunneling processes when the dot is occupied by two electrons, yielding non-local spin-singlet states at the output leads. When the dot is occupied by a single electron, net spin-singlet final states could be generated by injecting polarized electrons to the dot system. When the input electrons are unpolarized, we show that by carefully arranging model parameters non-local spin-triplet electrons can also be obtained at the output leads if the dot-electron spin remains unchanged in the final state.