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Cyclic quantum walks: Photonic realization and decoherence analysis

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Original languageEnglish
Title of host publicationAdvanced Optical Techniques for Quantum Information, Sensing, and Metrology
EditorsPhilip R. Hemmer, Alan L. Migdall, Zameer Ul Hasan
ISBN (Electronic)9781510633544
ISBN (Print)9781510633537
Publication statusPublished - 2020
Publication typeA4 Article in a conference publication
EventAdvanced Optical Techniques for Quantum Information, Sensing, and Metrology - San Francisco, United States
Duration: 4 Feb 20205 Feb 2020

Publication series

NameProceedings of SPIE - The International Society for Optical Engineering
ISSN (Print)0277-786X
ISSN (Electronic)1996-756X


ConferenceAdvanced Optical Techniques for Quantum Information, Sensing, and Metrology
CountryUnited States
CitySan Francisco


Quantum walks serve as novel tools for performing efficient quantum computation and simulation. In a recent experimental demonstration [1] we have realized photonic quantum walks for simulating cyclic quantum systems, such as hexagonal lattices or aromatic molecules like benzene. In that experiment we explored the wave function dynamics and the probability distribution of a quantum particle located on a six-site system (with periodic boundary conditions), alongside with simpler demonstration of three- and four-site systems, under various initial conditions. Localization and revival of the wave function were demonstrated. After revisiting that experiment we will theoretically analyze the case of noisy quantum walks by implementing the bit-phase flip channel. This will allow us to draw conclusions regarding the performance of our photonic quantum simulation in noisy environments. Finally, we will briefly outline some future directions.


  • Decoherence, Photonic quantum walks, Quantum simulation

Publication forum classification

Field of science, Statistics Finland