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

Zhi Hao Bian, Jian Li, Xiang Zhan, Jason Twamley, Peng Xue*

*Corresponding author for this work

Research output: Contribution to journalArticlepeer-review

26 Citations (Scopus)


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.

Original languageEnglish
Article number052338
Pages (from-to)1-7
Number of pages7
JournalPhysical Review A
Issue number5
Publication statusPublished - 19 May 2017


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