Superconducting surface trap chips for microwave-driven trapped ions

IF 5.8 2区 物理与天体物理 Q1 OPTICS EPJ Quantum Technology Pub Date : 2024-09-09 DOI:10.1140/epjqt/s40507-024-00269-3
Yuta Tsuchimoto, Ippei Nakamura, Shotaro Shirai, Atsushi Noguchi
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Abstract

Microwave-driven trapped ion logic gates offer a promising avenue for advancing beyond laser-based logic operations. In future microwave-based operations, however, the joule heat produced by large microwave currents flowing through narrow microwave electrodes would potentially hinder improvements in gate speed and fidelity. Moreover, scalability, particularly in cryogenic trapped ion systems, is impeded by the excessive joule heat. To address these challenges, we present a novel approach: superconducting surface trap chips that integrate high-Q microwave resonators with large current capacities. Utilizing sub-ampere microwave currents in superconducting Nb resonators, we generate substantial magnetic field gradients with significantly reduced losses compared to conventional metal chips. By harnessing the high Q factors of superconducting resonators, we propose a power-efficient two-qubit gate scheme capable of achieving a sub-milliwatt external microwave input power at a gate Rabi frequency of 1 kHz.

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用于微波驱动被俘离子的超导表面阱芯片
微波驱动的陷波离子逻辑门为超越激光逻辑运算提供了一条大有可为的途径。然而,在未来基于微波的操作中,流经狭窄微波电极的大微波电流所产生的焦耳热可能会阻碍栅极速度和保真度的提高。此外,可扩展性,尤其是在低温捕获离子系统中,也会因焦耳热过高而受到阻碍。为了应对这些挑战,我们提出了一种新方法:集成了大电流容量高 Q 值微波谐振器的超导表面阱芯片。利用超导铌谐振器中的亚安培微波电流,我们产生了巨大的磁场梯度,与传统金属芯片相比,损耗显著降低。通过利用超导谐振器的高Q系数,我们提出了一种高能效的双量子比特栅极方案,能够在栅极拉比频率为1 kHz时实现亚毫瓦级的外部微波输入功率。
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来源期刊
EPJ Quantum Technology
EPJ Quantum Technology Physics and Astronomy-Atomic and Molecular Physics, and Optics
CiteScore
7.70
自引率
7.50%
发文量
28
审稿时长
71 days
期刊介绍: Driven by advances in technology and experimental capability, the last decade has seen the emergence of quantum technology: a new praxis for controlling the quantum world. It is now possible to engineer complex, multi-component systems that merge the once distinct fields of quantum optics and condensed matter physics. EPJ Quantum Technology covers theoretical and experimental advances in subjects including but not limited to the following: Quantum measurement, metrology and lithography Quantum complex systems, networks and cellular automata Quantum electromechanical systems Quantum optomechanical systems Quantum machines, engineering and nanorobotics Quantum control theory Quantum information, communication and computation Quantum thermodynamics Quantum metamaterials The effect of Casimir forces on micro- and nano-electromechanical systems Quantum biology Quantum sensing Hybrid quantum systems Quantum simulations.
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