Photonic Source of Heralded Greenberger-Horne-Zeilinger States

H. Cao; L. M. Hansen; F. Giorgino; L. Carosini; P. Zahálka; F. Zilk; J. C. Loredo; P. Walther

doi:10.1103/PhysRevLett.132.130604

Photonic Source of Heralded Greenberger-Horne-Zeilinger States

H. Cao
, L. M. Hansen
, F. Giorgino
, L. Carosini
, P. Zahálka
, F. Zilk
, J. C. Loredo (Corresponding author)
, P. Walther (Corresponding author)

Quantum Science

Publications: Contribution to journal › Article › Peer Reviewed

Abstract

Generating large multiphoton entangled states is of main interest due to enabling universal photonic quantum computing and all-optical quantum repeater nodes. These applications exploit measurement-based quantum computation using cluster states. Remarkably, it was shown that photonic cluster states of arbitrary size can be generated by using feasible heralded linear optics fusion gates that act on heralded three-photon Greenberger-Horne-Zeilinger (GHZ) states as the initial resource state. Thus, the capability of generating heralded GHZ states is of great importance for scaling up photonic quantum computing. Here, we experimentally demonstrate this required building block by reporting a polarisation-encoded heralded GHZ state of three photons, for which we build a high-rate six-photon source (547±2 Hz) from a solid-state quantum emitter and a stable polarization-based interferometer. The detection of three ancillary photons heralds the generation of three-photon GHZ states among the remaining particles with fidelities up to F=0.7278±0.0106. Our results initiate a path for scalable entangling operations using heralded linear-optics implementations.

Original language	English
Article number	130604
Number of pages	7
Journal	Physical Review Letters
Volume	132
Issue number	13
DOIs	https://doi.org/10.1103/PhysRevLett.132.130604
Publication status	Published - 29 Mar 2024

Funding

from the Austrian Science Fund (FWF) through [10.55776/F71] (BeyondC) and [10.55776/FG5] (Research Group 5), and Quantum Science Austria (COE1). The financial support by the Austrian Federal Ministry for Digital and Economic Affairs, the National Foundation for Research, Technology and Development and the Christian Doppler Research Association is gratefully acknowledged. This research was funded in whole, or in part, from the European Union’s Horizon 2020 and Horizon Europe research and innovation programme under Grant Agreement No. 899368 (EPIQUS) and No 101135288 (EPIQUE), the Marie Skłodowska-Curie Grant Agreement No. 956071 (AppQInfo), and the QuantERA II Programme under Grant Agreement No. 101017733 (PhoMemtor); from the Austrian Science Fund (FWF) through [10.55776/F71] (BeyondC) and [10.55776/FG5] (Research Group 5), and Quantum Science Austria (COE1). The financial support by the Austrian Federal Ministry for Digital and Economic Affairs, the National Foundation for Research, Technology and Development and the Christian Doppler Research Association is gratefully acknowledged.

Austrian Fields of Science 2012

102040 Quantum computing
103026 Quantum optics

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10.1103/PhysRevLett.132.130604Licence: CC BY 4.0

Cite this

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title = "Photonic Source of Heralded Greenberger-Horne-Zeilinger States",

abstract = "Generating large multiphoton entangled states is of main interest due to enabling universal photonic quantum computing and all-optical quantum repeater nodes. These applications exploit measurement-based quantum computation using cluster states. Remarkably, it was shown that photonic cluster states of arbitrary size can be generated by using feasible heralded linear optics fusion gates that act on heralded three-photon Greenberger-Horne-Zeilinger (GHZ) states as the initial resource state. Thus, the capability of generating heralded GHZ states is of great importance for scaling up photonic quantum computing. Here, we experimentally demonstrate this required building block by reporting a polarisation-encoded heralded GHZ state of three photons, for which we build a high-rate six-photon source (547±2 Hz) from a solid-state quantum emitter and a stable polarization-based interferometer. The detection of three ancillary photons heralds the generation of three-photon GHZ states among the remaining particles with fidelities up to F=0.7278±0.0106. Our results initiate a path for scalable entangling operations using heralded linear-optics implementations.",

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N2 - Generating large multiphoton entangled states is of main interest due to enabling universal photonic quantum computing and all-optical quantum repeater nodes. These applications exploit measurement-based quantum computation using cluster states. Remarkably, it was shown that photonic cluster states of arbitrary size can be generated by using feasible heralded linear optics fusion gates that act on heralded three-photon Greenberger-Horne-Zeilinger (GHZ) states as the initial resource state. Thus, the capability of generating heralded GHZ states is of great importance for scaling up photonic quantum computing. Here, we experimentally demonstrate this required building block by reporting a polarisation-encoded heralded GHZ state of three photons, for which we build a high-rate six-photon source (547±2 Hz) from a solid-state quantum emitter and a stable polarization-based interferometer. The detection of three ancillary photons heralds the generation of three-photon GHZ states among the remaining particles with fidelities up to F=0.7278±0.0106. Our results initiate a path for scalable entangling operations using heralded linear-optics implementations.

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Photonic Source of Heralded Greenberger-Horne-Zeilinger States

Abstract

Funding

Austrian Fields of Science 2012

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quantA: Quantum Science Austria

Christian Doppler Laboratory for Photonic Quantum Computer

Beyond C: Quantum Information Systems Beyond Classical Capabilities

Cite this

Photonic Source of Heralded Greenberger-Horne-Zeilinger States

Abstract

Funding

Austrian Fields of Science 2012

Access to Document

Other files and links

Fingerprint

Projects

quantA: Quantum Science Austria

Christian Doppler Laboratory for Photonic Quantum Computer

Beyond C: Quantum Information Systems Beyond Classical Capabilities

Cite this