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Cited by 42Quantum Computing Algorithms and ArchitectureQuantum Information and CryptographyQuantum Mechanics and Applications

Exploring complex graphs using three-dimensional quantum walks of correlated photons

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Ehrhardt, Max, Keil, Robert, Maczewsky, Lukas J., Dittel, Christoph, Heinrich, Matthias, Szameit, Alexander·2021·Science Advances
DOI 10.1126/sciadv.abc5266PMC PMC7909875
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Abstract

Graph representations are a powerful concept for solving complex problems across natural science, as patterns of connectivity can give rise to a multitude of emergent phenomena. Graph-based approaches have proven particularly fruitful in quantum communication and quantum search algorithms in highly branched quantum networks. Here, we introduce a previously unidentified paradigm for the direct experimental realization of excitation dynamics associated with three-dimensional networks by exploiting the hybrid action of spatial and polarization degrees of freedom of photon pairs in complex waveguide circuits with tailored birefringence. This testbed for the experimental exploration of multiparticle quantum walks on complex, highly connected graphs paves the way toward exploiting the applicative potential of fermionic dynamics in integrated quantum photonics.

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  • Recent works reported 2D continuous-time quantum walks of correlated photons, relying on arrays of coupled waveguides, and important results have also been achieved by means of superconductive quantum processors.

    “Recent works reported 2D continuous-time quantum walks of correlated photons, relying on arrays of coupled waveguides 21,38,52 , and important results have been also achieved by means of superconductive quantum processors 6 .”

    From Quantum walks of two correlated photons in a 2D synthetic lattice (2022) · cites this paper as [21]

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Authors
Ehrhardt, M., Keil, R., Maczewsky, L. J., Dittel, C., Heinrich, M., & Szameit, A.
Affiliations
  • University of Rostock (DE)
  • Universität Innsbruck (AT)
  • University of Freiburg (DE)
Corresponding author
Szameit, Alexander
ORCID
Venue
Science Advances
Publisher
American Association for the Advancement of Science (AAAS)
Published
2021-02-26
Volume
7
Issue
9
ISSN
2375-2548 (ISSN-L)
DOI
10.1126/sciadv.abc5266
PMC
PMC7909875
OpenAlex
W3040886084
Cited by
42
References
16
Citations by year
2026: 4 · 2025: 8 · 2024: 11 · 2023: 8 · 2022: 8 · 2021: 3
FWCI
2.65
Type
journal article
Language
en
Open access
Licence
Locations
  • Science Advances (publishedVersion, cc-by-nc)
  • PubMed Central (publishedVersion, cc-by-nc)
  • PubMed (publishedVersion)
  • arXiv (Cornell University) (submittedVersion)
  • arXiv (Cornell University)
Funders
  • Deutsche Forschungsgemeinschaft (SZ 276/12-1, SZ 276/15-1, SZ 276/20-1, SZ 276/21-1, BL 574/13-1)
  • Austrian Science Fund (grant P 30459)
  • Alfried Krupp von Bohlen und Halbach-Stiftung
  • Horizon 2020 (ErBeStA 800942)
  • Georg H. Endress foundation
Topics
  • Physical Sciences › Computer Science › Artificial Intelligence › Quantum Computing Algorithms and Architecture
  • Physical Sciences › Computer Science › Artificial Intelligence › Quantum Information and Cryptography
  • Physical Sciences › Physics and Astronomy › Atomic and Molecular Physics, and Optics › Quantum Mechanics and Applications
Keywords
quantum walks, three-dimensional graphs, correlated photons, photon pairs, spatial degrees of freedom, waveguide circuits, birefringence, excitation dynamics, integrated quantum photonics, quantum networks

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