2014/02/28 by Bryce G. C. Lackenby, B. G. C. Lackenby, O. P. Sushkov +1 · 3 citations
Computer Science · Engineering · Mathematics · Physics and Astronomy · #Computer science #Condensed matter physics #Electron #Geometry #Materials science #Mathematics #Molecular Junctions and Nanostructures #Phase (matter) #Physics #Point (geometry) #Quantum Information and Cryptography #Quantum and electron transport phenomena #Quantum mechanics #Quantum point contact #Quantum well #Telecommunications #Transmission (telecommunications) #cond-mat.mes-hall
paper · pdf · doi:10.1103/physrevb.90.155434
published in Physical Review B 90(15) (American Physical Society) · 4 pages, 3 figures
arxiv created 2014/03/10 · openalex publication_date 2014/10/21 · arxiv updated 2014/10/29 · openalex created_date 2025/10/10 · openalex updated_date 2026/08/05
Here we calculate the electron transmission phase through a quantum point contact (QPC). The QPC is considered in the saddle-point approximation in the single-electron picture. We show that when the electron energy is close to the height of the potential barrier, the transmission phase depends linearly on the energy. The coefficient in the linear dependence is logarithmically enhanced by the ratio of the height over the curvature of the barrier potential. We compare the calculated transmission phase with the first experimental measurements of the phase.