Quantum walks with dynamical control: Graph engineering, initial state preparation and state transfer

Thomas Nitsche, Fabian Elster, Jaroslav Novotný, Aurél Gábris, Igor Jex, Sonja Barkhofen, Christine Silberhorn

Research output: Contribution to journalArticle

20 Citations (Scopus)

Abstract

Quantum walks are a well-established model for the study of coherent transport phenomena and provide a universal platform in quantum information theory. Dynamically influencing the walker's evolution gives a high degree of flexibility for studying various applications. Here, we present time-multiplexed finite quantum walks of variable size, the preparation of non-localised input states and their dynamical evolution. As a further application, we implement a state transfer scheme for an arbitrary input state to two different output modes. The presented experiments rely on the full dynamical control of a time-multiplexed quantum walk, which includes adjustable coin operation as well as the possibility to flexibly configure the underlying graph structures.

Original languageEnglish
Article number063017
JournalNew Journal of Physics
Volume18
Issue number6
DOIs
Publication statusPublished - Jun 2016

Keywords

  • dynamic coin control
  • graph engineering
  • quantum walks
  • state preparation
  • state transfer
  • time-multiplexing

ASJC Scopus subject areas

  • Physics and Astronomy(all)

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