Photons walking the line: a quantum walk with adjustable coin operations

A Schreiber, K N Cassemiro, V Potoček, A Gábris, Peter James Mosley, E Andersson, I Jex, Ch Silberhorn

Research output: Contribution to journalArticle

356 Citations (Scopus)

Abstract

We present the first robust implementation of a coined quantum walk over five steps using only passive optical elements. By employing a fiber network loop we keep the amount of required resources constant as the walker’s position Hilbert space is increased. We observed a non-Gaussian distribution of the walker’s final position, thus characterizing a faster spread of the photon wave packet in comparison to the classical random walk. The walk is realized for many different coin settings and initial states, opening the way for the implementation of a quantum-walk-based search algorithm.
Original languageEnglish
Article number050502
Number of pages4
JournalPhysical Review Letters
Volume104
Issue number5
Early online date4 Feb 2010
DOIs
Publication statusPublished - 5 Feb 2010

Fingerprint Dive into the research topics of 'Photons walking the line: a quantum walk with adjustable coin operations'. Together they form a unique fingerprint.

  • Cite this

    Schreiber, A., Cassemiro, K. N., Potoček, V., Gábris, A., Mosley, P. J., Andersson, E., Jex, I., & Silberhorn, C. (2010). Photons walking the line: a quantum walk with adjustable coin operations. Physical Review Letters, 104(5), [050502]. https://doi.org/10.1103/PhysRevLett.104.050502