Universal Quantum Transducers Based on Surface Acoustic Waves
Universal Quantum Transducers Based on Surface Acoustic Waves
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DOI：
10.1103/physrevx.5.031031
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发表时间：
2015-09-10
影响因子：
12.5
通讯作者：
Cirac, J. I.
中科院分区：
文献类型：
--
作者：
Schuetz, M. J. A.;Kessler, E. M.;Cirac, J. I.
我们提出了一种基于压电活性材料表面声波的通用片上量子换能器。由于材料固有的压电（和/或磁致伸缩）特性，我们的方法提供了一个通用平台，能够相干地连接广泛的量子比特阵列，包括量子点、捕获离子、氮空位中心或超导量子比特。表面声波的量子化模式在千兆赫范围内，可以在声子腔中被强烈地限制在靠近表面的地方，并在声波导中被引导。我们表明，这种类型的表面声激发可以有效地用作量子总线，作为芯片上的机械腔- qed等效微波光子，并实现大范围量子位的远程耦合。
We propose a universal, on-chip quantum transducer based on surface acoustic waves in piezoactive materials. Because of the intrinsic piezoelectric (and/or magnetostrictive) properties of the material, our approach provides a universal platform capable of coherently linking a broad array of qubits, including quantum dots, trapped ions, nitrogen-vacancy centers, or superconducting qubits. The quantized modes of surface acoustic waves lie in the gigahertz range and can be strongly confined close to the surface in phononic cavities and guided in acoustic waveguides. We show that this type of surface acoustic excitation can be utilized efficiently as a quantum bus, serving as an on-chip, mechanical cavity-QED equivalent of microwave photons and enabling long-range coupling of a wide range of qubits.