Speaker
Description
Ion trap quantum processors have achieved the highest single and two-qubit gates [1,2], but due to constraints on optical access, electrode routing and motional mode crowding, scaling to larger qubit registers within a single device remains limited [3]. A modular architecture, in which multiple traps operate as independent nodes connected via photonic interconnects, offers a path to scalar quantum computation through remote entanglement generation. In such networked systems, the relevant metrics become the remote entanglement fidelity, photon collection efficiency $\eta_{p}$ and remote entanglement generation rate $R_{\mathrm{e}}$. High fidelity operation requires reproducible node fabrication and efficient light matter entanglement. Optical cavities integrated within the trap structure can enhance spontaneous emission into a well defined optical mode via the Purcell factor $F_{\mathrm{P}}$, thereby increasing both $\eta_p$ and $R_{\mathrm{e}}$.
An architecture for optically interconnected ion trap networks is defined here through the production of a fused silica selective laser etched (SLE) ion trap node alongside an integrated atomic source, also fabricated in $\mathrm{SiO}_2$ [4]. The matched material platform and three dimensional geometry provide mechanical stability and thermal compatibility, making this architecture well suited to compact and potentially cryogenic implementations. This fused $\mathrm{SiO}_2$ ion trap platform offers a scalable pathway toward cavity compatible modular nodes for networked trapped ion quantum computing systems.
References
[1] M. C. Smith, A. D. Leu, K. Miyanishi, M. F. Gely, and D. M. Lucas, "Single-qubit gates with errors at the $10^{-7}$ level," Phys. Rev. Lett., vol. 134, p. 230601, Jun. 2025.
[2] A. C. Hughes, R. Srinivas, C. M. Loschnauer, H. M. Knaack, R. Matt, C. J. Ballance, M. Malinowski, T. P. Harty, and R. T. Sutherland, "Trapped-ion two-qubit gates with $>99.99\%$ fidelity without ground-state cooling," arXiv:2510.17286, 2025.
[3] M. Malinowski, D. T. C. Allcock, and C. J. Ballance, "How to wire a 1000-qubit trapped-ion quantum computer," PRX Quantum, vol. 4, no. 4, p. 040313, 2023.
[4] L. Versini, T. F. Wohlers-Reichel, C. E. J. Challoner, T. Hinde, A. D. Rao, W. J. Hughes, P. Drmota, T. H. Doherty, L. J. Stephenson, J. A. Blackmore, and J. F. Goodwin, "Rapid all-optical loading of trapped ions using a miniaturised atom source," arXiv:2512.10514, 2025.
| Academic level | PhD student |
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