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DESCRIPTION:Distributed quantum computing with trapped ions across an optical interconnect Dr. David Nadlinger Senior Researcher\, Ion Trap Quantum Computing group Clarendon Laboratory\, Department of Physics - University of Oxford Abstract: Modularity underpins classical computing\; as quantum processors encounter limits on fabrication yield\, reliability\, and size\, they will need it just as acutely. One universal quantum resource enables not only large-scale computing\, but also secure communication and metrology: the photon-mediated generation of Bell pairs between remote qubits. In this talk\, I will describe an elementary quantum network at the University of Oxford that has advanced the state of the art in remote entanglement performance\, creating Bell pairs with up to 98% fidelity between ⁸⁸Sr⁺ ions held in separate vacuum chambers at rates ~100 s⁻¹. Co-trapped ⁴³Ca⁺ ions provide a long-lived substrate for application circuits undisturbed by network activity (remote Bell-state coherence time >10 s). This has recently enabled the first distributed quantum computation across optically linked quantum processors using deterministic quantum gate teleportation [1]\, as well as remote error correction [2]. At present speeds\, these remote operations would still limit system performance\; to conclude\, I will propose a path for scaling optical interconnects to meet the demands of future error-corrected processors [3]. [1] D. Main et al.\, “Distributed quantum computing across an optical network link”\, Nature 638\, 383–388 (2025)\, https://www.nature.com/articles/s41586-024-08404-x [2] E. M. Ainley et al.\, “Error Correction in a Distributed Quantum Computer”\, https://arxiv.org/abs/2609.13065 [3] F. W. Knollmann et al.\, “Remote entanglement need not be the bottleneck for modular trapped-ion quantum computing”\, https://arxiv.org/abs/2607.18387
X-ALT-DESC;FMTTYPE=text/html:Distributed quantum computing with trapped ions across an optical interconnect Dr. David Nadlinger Senior Researcher, Ion Trap Quantum Computing group Clarendon Laboratory, Department of Physics - University of Oxford Abstract: Modularity underpins classical computing; as quantum processors encounter limits on fabrication yield, reliability, and size, they will need it just as acutely. One universal quantum resource enables not only large-scale computing, but also secure communication and metrology: the photon-mediated generation of Bell pairs between remote qubits. In this talk, I will describe an elementary quantum network at the University of Oxford that has advanced the state of the art in remote entanglement performance, creating Bell pairs with up to 98% fidelity between ⁸⁸Sr⁺ ions held in separate vacuum chambers at rates ~100 s⁻¹. Co-trapped ⁴³Ca⁺ ions provide a long-lived substrate for application circuits undisturbed by network activity (remote Bell-state coherence time >10 s). This has recently enabled the first distributed quantum computation across optically linked quantum processors using deterministic quantum gate teleportation [1], as well as remote error correction [2]. At present speeds, these remote operations would still limit system performance; to conclude, I will propose a path for scaling optical interconnects to meet the demands of future error-corrected processors [3]. [1] D. Main et al., “Distributed quantum computing across an optical network link”, Nature 638, 383–388 (2025), https://www.nature.com/articles/s41586-024-08404-x [2] E. M. Ainley et al., “Error Correction in a Distributed Quantum Computer”, https://arxiv.org/abs/2609.13065 [3] F. W. Knollmann et al., “Remote entanglement need not be the bottleneck for modular trapped-ion quantum computing”, https://arxiv.org/abs/2607.18387
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SUMMARY:IQC Special Seminar featuring David Nadlinger
DTSTART;TZID=America/New_York:20260923T140000
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DTSTAMP:20260923T065336Z
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LOCATION:RAC 2009
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