Dispersion cancellation in a quantum interferometer with independent single photons

A key technique to perform proper quantum information processing is to get a high visibility quantum interference between independent single photons. One of the crucial elements that affects the quantum interference is a group velocity dispersion that occurs when single photons pass through a disper...

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Bibliographic Details
Published in:Optics express 2021-01, Vol.29 (2), p.2348-2363
Main Authors: Im, Dong-Gil, Kim, Yosep, Kim, Yoon-Ho
Format: Article
Language:English
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Summary:A key technique to perform proper quantum information processing is to get a high visibility quantum interference between independent single photons. One of the crucial elements that affects the quantum interference is a group velocity dispersion that occurs when single photons pass through a dispersive medium. We theoretically and experimentally demonstrate that an effect of group velocity dispersion on the two-photon interference can be cancelled if two independent single photons experience the same amount of pulse broadening. This dispersion cancellation effect can be applied to a multi-path linear interferometer with multiple independent single photons. As multi-path quantum interferometers are at the heart of quantum communication, photonic quantum computing, and boson sampling applications, our work should find wide applicability in quantum information science.
ISSN:1094-4087
1094-4087
DOI:10.1364/OE.415610