2001/07/16 by William D. Oliver, F. Yamaguchi, Fumiko Yamaguchi +1
Computer Science · Physics and Astronomy · #Atomic physics #Coulomb #Coulomb blockade #Electron #Excited state #Photon #Physics #Quantum #Quantum Computing Algorithms and Architecture #Quantum Information and Cryptography #Quantum and electron transport phenomena #Quantum dot #Quantum entanglement #Quantum mechanics #Quantum tunnelling #Singlet state #cond-mat.mes-hall #quant-ph
paper · pdf · doi:10.1103/physrevlett.88.037901
published as PHYS REV LETT 88 (3): Art. No. 037901 JAN 21 2002 · 4 pages
arxiv created 2001/07/16 · openalex publication_date 2002/01/03 · arxiv updated 2009/11/30 · openalex created_date 2025/10/10 · openalex updated_date 2026/08/05
This Letter presents a method of electron entanglement generation. The system under consideration is a single-level quantum dot with one input and two output leads. The leads are arranged such that the dot is empty, single-electron tunneling is suppressed by energy conservation, and two-electron virtual cotunneling is allowed. Such a configuration effectively filters the singlet-state portion of a two-electron input, yielding a nonlocal spin-singlet state at the output leads. Coulomb interaction mediates the entanglement generation, and, in its absence, the singlet state vanishes. This approach is a four-wave mixing process analogous to the photon entanglement generated by a chi((3)) parametric amplifier.