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arXiv 2406.07360quant-ph
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一种机械量子比特

A mechanical qubit

Yu Yang, Igor Kladaric, Maxwell Drimmer, Uwe von Luepke, Daan Lenterman, Joost Bus, Stefano Marti, Matteo Fadel, Yiwen Chu

AI总结:

本文在固态机械系统中实现单声子非线性区间,利用超过退相干率 6.8 倍的非谐性构建机械量子比特,并完成初始化、读出和全套单比特门。

摘要:

量子化激发之间的强非线性相互作用是基于玻色谐振子模式的量子技术的重要资源。然而,由材料本征属性产生的大多数电磁和机械非线性,与系统中的耗散相比都过于微弱,以至于无法在单量子层级观测到非线性效应。为克服这一限制,光学和微波频段的电磁谐振器已被耦合到原子和超导量子比特等其他强非线性量子系统,从而借助 Kerr 效应实现了光子阻塞和相干量子协议等效应的演示。本文展示了在固态机械系统中实现单声子非线性区间。系统中的单声子非谐性比退相干率高出 6.8 倍,使我们能够将谐振器最低的两个能级用作机械量子比特,并对其展示了初始化、读出以及一整套直接的单量子比特门。本工作为用于量子模拟、传感和信息处理的强大量子声学平台增添了又一项独特能力。

英文摘要:

Strong nonlinear interactions between quantized excitations are an important resource for quantum technologies based on bosonic oscillator modes. However, most electromagnetic and mechanical nonlinearities arising from intrinsic material properties are far too weak compared to dissipation in the system to allow for nonlinear effects to be observed on the single-quantum level. To overcome this limitation, electromagnetic resonators in both the optical and microwave frequency regimes have been coupled to other strongly nonlinear quantum systems such as atoms and superconducting qubits, allowing for the demonstration of effects such as photon blockade and coherent quantum protocols using the Kerr effect. Here, we demonstrate the realization of the single-phonon nonlinear regime in a solid-state mechanical system. The single-phonon anharmonicity in our system exceeds the decoherence rate by a factor of 6.8, allowing us to use the lowest two energy levels of the resonator as a mechanical qubit, for which we show initialization, readout, and a complete set of direct single qubit gates. Our work adds another unique capability to a powerful quantum acoustics platform for quantum simulations, sensing, and information processing.

机构、总结、中文摘要均由AI分析而来,可能存在错误,请以论文正文为准。

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