Optimized electron propagation on a quantum chain by a topological phase

Simone Paganelli, Gian Luca Giorgi, Ferdinando de Pasquale

Research output: Contribution to journalArticleResearchpeer-review

12 Citations (Scopus)

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. © 2009 WILEY-VCH Verlag GmbH & Co. KGaA, Weinheim.
Original languageEnglish
Pages (from-to)1094-1102
JournalFortschritte der Physik
Volume57
Issue number11-12
DOIs
Publication statusPublished - 1 Nov 2009

Keywords

  • Quantum information
  • Quantum state transfer

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