Dispersion cancellation in a quantum interferometer with independent single photons

A key technique to perform a 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 the single photons pass through a...

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Bibliographic Details
Published in:arXiv.org 2020-08
Main Authors: Dong-Gil Im, Kim, Yosep, Yoon-Ho, Kim
Format: Article
Language:English
Subjects:
Data processing
Dispersion
Group velocity
Interference
Photons
Quantum computing
Quantum phenomena
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Summary:A key technique to perform a 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 the 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 generalized 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:2331-8422
DOI:10.48550/arxiv.2008.06611