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Quantum communication with ultrafast time-bin qubits

From National Research Council Canada

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DOIResolve DOI: https://doi.org/10.1103/PRXQuantum.3.010332
AuthorSearch for: 1ORCID identifier: https://orcid.org/0000-0003-4137-6250; Search for: 1; Search for: 1; Search for: 1ORCID identifier: https://orcid.org/0000-0003-3864-1930; Search for: 1
Affiliation
  1. National Research Council Canada. Security and Disruptive Technologies
FunderSearch for: Natural Sciences and Engineering Research Council of Canada; Search for: University of Ottawa–National Research Council of Canada Joint Centre for Extreme Photonics
FormatText, Article
Abstract
The photonic temporal degree of freedom is one of the most promising platforms for quantum communication over fiber networks and free-space channels. In particular, time-bin states of photons are robust to environmental disturbances, support high-rate communication, and can be used in high-dimensional schemes. However, the detection of photonic time-bin states remains a challenging task, particularly for the case of photons that are in a superposition of different time bins. Here, we experimentally demonstrate the feasibility of picosecond time-bin states of light, known as ultrafast time bins, for applications in quantum communications. With the ability to measure time-bin superpositions with excellent phase stability, we enable the use of temporal states in efficient quantum key distribution protocols such as the BB84 protocol.
Publication date
PublisherAmerican Physical Society
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  • PRX Quantum 3, no. 1, 010332 (April 2022).
LanguageEnglish
Peer reviewedYes
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Record identifieree5d9a65-618c-4622-acb4-7a17dbffceef
Record created2022-05-24
Record modified2023-03-16
Date modified: