集成的光学多离子量子逻辑
Karan K Mehta1, Chi Zhang2, Maciej Malinowski2
1Department of Physics, Institute for Quantum Electronics, ETH Zürich, Zurich, Switzerland. mehtak@phys.ethz.ch.
Nature
|October 22, 2020
概括
研究人员为被困离子量子位开发了可扩展的集成光学,实现了高可靠性的量子逻辑门. 这种进步提高了稳定性, 并为实用,大规模的量子信息处理提供了途径.
科学领域:
- 量子信息科学
- 原子,分子和光学物理学
背景情况:
- 量子信息处理需要在当前系统中提高错误率和可扩展性.
- 但光学控制的复杂性阻碍了扩展.
- 离子陷中的集成光学可以提高系统的稳定性和并行性.
研究的目的:
- 展示与表面电极离子陷共同制造的可扩展光学,用于高可靠性的多离子量子逻辑门.
- 克服目前被困离子系统中的复杂光学设置的局限性.
- 为了实现高准确度量子处理器的实用并行化.
主要方法:
- 与表面电极离子陷一起制造可扩展光学.
- 通过多个通道将光纤直接合到冷陷芯片上.
- 实现地面状态激光冷却和双离子纠状态门.
主要成果:
- 在双离子纠状态下,实现了超过99.3%的保真度.
- 证明了高效的光输送,消除了复杂的光束对齐的需要.
- 在量子逻辑运算中减少噪音和漂移的硬件.
结论:
- 能够扩展的,集成的光学为高可靠性被困离子量子逻辑提供了强大的途径.
- 这种方法为先进的量子处理器提供了实用的并行化.
- 潜在的应用范围包括量子传感和计时.
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