2009/07/31 by Simone Paganelli, S. Paganelli, Gian Luca Giorgi +2 · 1 citation
Computer Science · Physics and Astronomy · #Quantum Information and Cryptography #Quantum and electron transport phenomena #Quantum optics and atomic interactions #quant-ph
paper · pdf · doi:10.1002/prop.200900087
published as Fortschr. Phys. 57, 1094 (2009) · 8 pages, 6 figures
arxiv created 2009/09/02 · openalex publication_date 2009/09/14 · arxiv updated 2009/12/01 · openalex created_date 2016/06/24 · openalex updated_date 2026/07/28
Abstract We study the quantum diffusion of an electron in a quantum chain starting from an initial state localized around a given site. As the wavepacket diffuses, the probability of reconstructing the initial state on another site diminishes drastically with the distance. In order to optimize the state transmission we find that a topological quantum phase can be introduced. The effect of this phase is the reduction of wavepacket spreading together with almost coherent group propagation. In this regime, the electron has a quasi‐linear dispersion and high fidelity can be achieved also over large distances in terms of lattice spacing.