Passive quantum interconnects: multiplexed remote entanglement generation with cavity-assisted photon scattering

2025/07/01 by Seigo Kikura, Kazufumi Tanji, Kikura, Seigo +5 · 3 citations
Computer Science · Physics and Astronomy · #Atomic Physics (physics.atom-ph) #FOS: Physical sciences #Quantum Computing Algorithms and Architecture #Quantum Gases (cond-mat.quant-gas) #Quantum Physics (quant-ph) #Quantum and electron transport phenomena #Quantum-Dot Cellular Automata

paper · pdf · doi:10.48550/arxiv.2507.01229

openalex publication_date 2025/07/01 · openalex created_date 2025/10/20 · openalex updated_date 2026/07/28

Abstract

We propose a time- and wavelength-multiplexed remote atom-atom entanglement generation protocol based on cavity-assisted photon scattering (CAPS). This is designed to achieve a high rate and high fidelity with robustness to operational imperfections, parameter fluctuations, and auxiliary time costs, such as percent-level photon impurity, timing and cavity parameter jitter, and atom shuttling time costs. We benchmark this protocol using comprehensive analytical and numerical modeling of the atom-cavity dynamics, including state-dependent pulse delay effects, photon temporal impurity, atom-cavity system parameter fluctuations, and crosstalk among atoms through a shared cavity mode. With realistic atom-cavity system performance, we predict 2× 10⁵ s^-1 successful atom-atom Bell pair generation even without in-cavity qubit reset, substantially enhanced from two-photon-interference-based protocols, at a predicted heralded fidelity of 0.999.

Citations

• Mode multiplexing for scalable cavity-enhanced operations in neutral-atom arrays
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• Parallelized telecom quantum networking with a ytterbium-171 atom array
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• High-rate and high-fidelity modular interconnects between neutral atom quantum processors
• Fault-Tolerant Connection of Error-Corrected Qubits with Noisy Links
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• Entanglement of Trapped-Ion Qubits Separated by 230 Meters
• How to factor 2048 bit RSA integers in 8 hours using 20 million noisy qubits
• Generation of non-classical light using semiconductor quantum dots
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• Fidelity of quantum operations

Cited by

• Single-shot conditional displacement gate between a trapped atom and traveling light
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• Scattering theory for cavity-assisted spin-motion-photon interactions

Related

• High-rate and high-fidelity modular interconnects between neutral atom quantum processors
• Photon-Mediated Quantum Gate between Two Trapped Neutral Atoms in an Optical Cavity
• Efficient and high-fidelity entanglement in cavity QED without high cooperativity
• Parallelized telecom quantum networking with a ytterbium-171 atom array
• Error-Detected Quantum Operations with Neutral Atoms Mediated by an Optical Cavity