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Title: Programmable photonic integrated meshes for modular generation of optical entanglement links

Abstract

Abstract Large-scale generation of quantum entanglement between individually controllable qubits is at the core of quantum computing, communications, and sensing. Modular architectures of remotely-connected quantum technologies have been proposed for a variety of physical qubits, with demonstrations reported in atomic and all-photonic systems. However, an open challenge in these architectures lies in constructing high-speed and high-fidelity reconfigurable photonic networks for optically-heralded entanglement among target qubits. Here we introduce a programmable photonic integrated circuit (PIC), realized in a piezo-actuated silicon nitride (SiN)-in-oxide CMOS-compatible process, that implements an N × N Mach–Zehnder mesh (MZM) capable of high-speed execution of linear optical transformations. The visible-spectrum photonic integrated mesh is programmed to generate optical connectivity on up to N  = 8 inputs for a range of optically-heralded entanglement protocols. In particular, we experimentally demonstrated optical connections between 16 independent pairwise mode couplings through the MZM, with optical transformation fidelities averaging 0.991 ± 0.0063. The PIC’s reconfigurable optical connectivity suffices for the production of 8-qubit resource states as building blocks of larger topological cluster states for quantum computing. Our programmable PIC platform enables the fast and scalable optical switching technology necessary for network-based quantum information processors.

Authors:
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Publication Date:
Research Org.:
Brookhaven National Lab. (BNL), Upton, NY (United States)
Sponsoring Org.:
USDOE Office of Science (SC), Basic Energy Sciences (BES)
OSTI Identifier:
1971678
Alternate Identifier(s):
OSTI ID: 1974393
Report Number(s):
BNL-224427-2023-JAAM
Journal ID: ISSN 2056-6387; 42; PII: 708
Grant/Contract Number:  
SC0012704
Resource Type:
Published Article
Journal Name:
npj Quantum Information
Additional Journal Information:
Journal Name: npj Quantum Information Journal Volume: 9 Journal Issue: 1; Journal ID: ISSN 2056-6387
Publisher:
Nature Publishing Group
Country of Publication:
United Kingdom
Language:
English
Subject:
47 OTHER INSTRUMENTATION; integrated optics; quantum information

Citation Formats

Dong, Mark, Zimmermann, Matthew, Heim, David, Choi, Hyeongrak, Clark, Genevieve, Leenheer, Andrew J., Palm, Kevin J., Witte, Alex, Dominguez, Daniel, Gilbert, Gerald, Eichenfield, Matt, and Englund, Dirk. Programmable photonic integrated meshes for modular generation of optical entanglement links. United Kingdom: N. p., 2023. Web. doi:10.1038/s41534-023-00708-6.
Dong, Mark, Zimmermann, Matthew, Heim, David, Choi, Hyeongrak, Clark, Genevieve, Leenheer, Andrew J., Palm, Kevin J., Witte, Alex, Dominguez, Daniel, Gilbert, Gerald, Eichenfield, Matt, & Englund, Dirk. Programmable photonic integrated meshes for modular generation of optical entanglement links. United Kingdom. https://doi.org/10.1038/s41534-023-00708-6
Dong, Mark, Zimmermann, Matthew, Heim, David, Choi, Hyeongrak, Clark, Genevieve, Leenheer, Andrew J., Palm, Kevin J., Witte, Alex, Dominguez, Daniel, Gilbert, Gerald, Eichenfield, Matt, and Englund, Dirk. Thu . "Programmable photonic integrated meshes for modular generation of optical entanglement links". United Kingdom. https://doi.org/10.1038/s41534-023-00708-6.
@article{osti_1971678,
title = {Programmable photonic integrated meshes for modular generation of optical entanglement links},
author = {Dong, Mark and Zimmermann, Matthew and Heim, David and Choi, Hyeongrak and Clark, Genevieve and Leenheer, Andrew J. and Palm, Kevin J. and Witte, Alex and Dominguez, Daniel and Gilbert, Gerald and Eichenfield, Matt and Englund, Dirk},
abstractNote = {Abstract Large-scale generation of quantum entanglement between individually controllable qubits is at the core of quantum computing, communications, and sensing. Modular architectures of remotely-connected quantum technologies have been proposed for a variety of physical qubits, with demonstrations reported in atomic and all-photonic systems. However, an open challenge in these architectures lies in constructing high-speed and high-fidelity reconfigurable photonic networks for optically-heralded entanglement among target qubits. Here we introduce a programmable photonic integrated circuit (PIC), realized in a piezo-actuated silicon nitride (SiN)-in-oxide CMOS-compatible process, that implements an N × N Mach–Zehnder mesh (MZM) capable of high-speed execution of linear optical transformations. The visible-spectrum photonic integrated mesh is programmed to generate optical connectivity on up to N  = 8 inputs for a range of optically-heralded entanglement protocols. In particular, we experimentally demonstrated optical connections between 16 independent pairwise mode couplings through the MZM, with optical transformation fidelities averaging 0.991 ± 0.0063. The PIC’s reconfigurable optical connectivity suffices for the production of 8-qubit resource states as building blocks of larger topological cluster states for quantum computing. Our programmable PIC platform enables the fast and scalable optical switching technology necessary for network-based quantum information processors.},
doi = {10.1038/s41534-023-00708-6},
journal = {npj Quantum Information},
number = 1,
volume = 9,
place = {United Kingdom},
year = {Thu Apr 27 00:00:00 EDT 2023},
month = {Thu Apr 27 00:00:00 EDT 2023}
}

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