Experimental implementation of a quantum walk on a circle with single photons

Zhi-Hao Bian, Jian Li, Xiang Zhan, Jason Twamley, and Peng Xue
Phys. Rev. A 95, 052338 – Published 19 May 2017

Abstract

We experimentally implement a quantum walk on a circle in position space. Using a different arrangement of linear optical elements, our experiment realizes clockwise-cycling and counterclockwise-cycling walks. Periodic evolutions in quantum walks on three- and four-node circles with uniform coin flipping for each step and a localized initial walker state are observed, and the full revival of the walker+coin state occurs. Coherent information encoded in the coin state shows the periodic collapse and revival due to the interaction between the coin and walker. The technology to realize clockwise-cycling and counterclockwise-cycling walks can be expanded to simulate a quantum walk on a circle with arbitrary nodes.

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  • Received 22 April 2017

DOI:https://doi.org/10.1103/PhysRevA.95.052338

©2017 American Physical Society

Physics Subject Headings (PhySH)

Quantum Information, Science & TechnologyAtomic, Molecular & Optical

Authors & Affiliations

Zhi-Hao Bian1, Jian Li1, Xiang Zhan1, Jason Twamley2, and Peng Xue1,3,*

  • 1Department of Physics, Southeast University, Nanjing 211189, China
  • 2ARC Centre for Engineered Quantum Systems, Department of Physics and Astronomy, Macquarie University, North Ryde, New South Wales 2109, Australia
  • 3State Key Laboratory of Precision Spectroscopy, East China Normal University, Shanghai 200062, China

  • *gnep.eux@gamil.com

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Issue

Vol. 95, Iss. 5 — May 2017

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