Early Career Conference in Trapped Ions (ECCTI) 2026, Oxford

Scalable Surface Electrode Ion Trap with Near-Field Microwave Gates and Chip-Integrated Nano-Photonics: Progress and Challenges

Not scheduled

1m

Poster Quantum Technologies Poster Session

Speaker

Mr Mohammad Masum Billah (Institut für Quantenoptik, Leibniz Universität Hannover ; Laboratorium für Nano und Quantenengineering, Leibniz Universität Hannover)

Description

In order to perform meaningful computations using the trapped-ion quantum processor, one of the most promising approaches is to utilize a micro-fabricated scalable Quantum Charged Coupled Device (QCCD) architecture [1]. However, reliance on free-space lasers hinders efficient scaling. In our research group, the implementation of microwave near-field gate operations have been demonstrated to be a viable approach for mitigating the free-space laser overhead [2–5]. Furthermore, comprehensive scalability can be facilitated by the integration of photonics, which would ensure the delivery of focused laser beams to the desired location for the purpose of ionization, cooling, state preparation, read-out and other relevant processes [6]. The present study focuses on the design of a surface electrode ion trap quantum processor with integrated photonics for $^{40}$Ca$^{+}$, taking into consideration light polarization and phase, opto-electric effects, the overall impact on the trap's electromagnetic behavior, and the optimization of the micro-fabrication process of a multilayer ion trap with integrated optical waveguides and grating couplers on a dielectric substrate, such as fused silica, and sapphire [7–10].

Keywords: QCCD, near-field microwave, trapped-ion quantum processor, nano-photonics, microfabrication

References
[1] D. Kielpinski, C. Monroe, and D. J. Wineland. In: Nature (June 13, 2002).
[2] C. Ospelkaus et al. In: Physical Review Letters (Aug. 29, 2008).
[3] C. Ospelkaus et al. In: Nature (Aug. 2011).
[4] U. Warring et al. In: Physical Review Letters (Apr. 22, 2013).
[5] U. Warring et al. In: Physical Review A (Jan. 31, 2013).
[6] Carmelo Mordini et al. In: Physical Review X (Feb. 24, 2025).
[7] Guochun Du, Elena Jordan, and Tanja E. Mehlst¨aubler. arXiv.org. Mar. 26, 2025. url: https://arxiv.org/abs/2503.20387v2.
[8] Henning Hahn et al. arXiv.org. Dec. 6, 2018. url: https://arxiv.org/abs/1812.02445v2.
[9] A Bautista-Salvador et al. In: New Journal of Physics (Apr. 2019).
[10] Tobias Kippenberg, Martin Hubert Peter Pfeiffer, and Arne Kordts. U.S. pat. Ecole Polytechnique Federale de Lausanne EPFL. Nov. 10, 2016.