PreprintCC BY 4.0arXiv
Quantum Networking at the Speed of Quantum Computation: Kilohertz Entanglement in a Heterogeneous Quantum System
Abstract
Distributed quantum computing requires rapid, high-fidelity entanglement between qubits in separate processor modules. Photonic links between single-atom qubits provide switchable, long-range connections, but photon loss limits their entanglement rate. Here we entangle a trapped 138Ba+ ion with a silicon-vacancy (SiV−) center in a diamond nanophotonic cavity. A photon emitted by the ion is converted in wavelength and encoding, reflected from the SiV−--cavity system and detected, so that a single detected photon heralds entanglement. Including all conversion losses, we generate ion--SiV− Bell pairs at an average rate of 1.03(1) kHz with a fidelity of 87.9(7)%. This is four times the rate of the fastest photonic link between two trapped ions and corresponds to one Bell pair per millisecond, matching the cycle time of planned trapped-ion processors.
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BibTeX
@misc{hartung2026quantum,
title = {{Quantum Networking at the Speed of Quantum Computation: Kilohertz Entanglement in a Heterogeneous Quantum System}},
author = {Lukas Hartung and Pierre Barral and Noah Glachman and George Toh and Jacob H. Davidson and Sagnik Saha and Alexander Chuang and Matthew C. Cambria and Madison Sutula and Alexander Abulnaga and Julia Brevoord and John Chiaverini and Ian Counts and Aos Dabbagh and Christian Dangel and Skylar Deckoff-Jones and Chawina De-Eknamkul and Jonathan Dietz and Riley Forst and Prithvi Gundlapalli and Jeonghoon Ha and Michael Haas and Ezekiel Meulbroek and Andrea Mucchietto and Daniel Riedel and Jonah Sachs and Jeremy Sage and Mikhail Shalaev and Harriet Shi and Denis Sukachev and Yichao Yu and Christopher Monroe and Nicholas Mondrik and Mihir Bhaskar and Bart Machielse and Matteo Pompili and Carsten Robens and David Levonian},
howpublished = {arXiv},
year = {2026},
month = oct,
doi = {10.48550/arxiv.2610.10705},
eprint = {2610.10705},
archivePrefix = {arXiv},
url = {https://arxiv.org/abs/2610.10705},
note = {CC BY 4.0},
}
RIS
TY - UNPB
TI - Quantum Networking at the Speed of Quantum Computation: Kilohertz Entanglement in a Heterogeneous Quantum System
AU - Lukas Hartung
AU - Pierre Barral
AU - Noah Glachman
AU - George Toh
AU - Jacob H. Davidson
AU - Sagnik Saha
AU - Alexander Chuang
AU - Matthew C. Cambria
AU - Madison Sutula
AU - Alexander Abulnaga
AU - Julia Brevoord
AU - John Chiaverini
AU - Ian Counts
AU - Aos Dabbagh
AU - Christian Dangel
AU - Skylar Deckoff-Jones
AU - Chawina De-Eknamkul
AU - Jonathan Dietz
AU - Riley Forst
AU - Prithvi Gundlapalli
AU - Jeonghoon Ha
AU - Michael Haas
AU - Ezekiel Meulbroek
AU - Andrea Mucchietto
AU - Daniel Riedel
AU - Jonah Sachs
AU - Jeremy Sage
AU - Mikhail Shalaev
AU - Harriet Shi
AU - Denis Sukachev
AU - Yichao Yu
AU - Christopher Monroe
AU - Nicholas Mondrik
AU - Mihir Bhaskar
AU - Bart Machielse
AU - Matteo Pompili
AU - Carsten Robens
AU - David Levonian
PY - 2026
DA - 2026/10/09
PB - arXiv
DO - 10.48550/arxiv.2610.10705
UR - https://arxiv.org/abs/2610.10705
AB - Distributed quantum computing requires rapid, high-fidelity entanglement between qubits in separate processor modules. Photonic links between single-atom qubits provide switchable, long-range connections, but photon loss limits their entanglement rate. Here we entangle a trapped ^138Ba^+ ion with a silicon-vacancy (SiV^−) center in a diamond nanophotonic cavity. A photon emitted by the ion is converted in wavelength and encoding, reflected from the SiV^−--cavity system and detected, so that a single detected photon heralds entanglement. Including all conversion losses, we generate ion--SiV^− Bell pairs at an average rate of 1.03(1) kHz with a fidelity of 87.9(7)%. This is four times the rate of the fastest photonic link between two trapped ions and corresponds to one Bell pair per millisecond, matching the cycle time of planned trapped-ion processors.
ER -