Emergence of randomness and arrow of time in quantum walks

Yutaka Shikano, Kota Chisaki, Etsuo Segawa, Norio Konno

Research output: Contribution to journalArticlepeer-review

28 Citations (Scopus)


Quantum walks are powerful tools not only for constructing the quantum speedup algorithms but also for describing specific models in physical processes. Furthermore, the discrete time quantum walk has been experimentally realized in various setups. We apply the concept of the quantum walk to the problems in quantum foundations. We show that randomness and the arrow of time in the quantum walk gradually emerge by periodic projective measurements from the mathematically obtained limit distribution under the time-scale transformation.

Original languageEnglish
Article number062129
JournalPhysical Review A - Atomic, Molecular, and Optical Physics
Issue number6
Publication statusPublished - 2010 Jun 28

ASJC Scopus subject areas

  • Atomic and Molecular Physics, and Optics

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