High efficiency microwave-optical transduction for quantum-state transfer remains an outstanding technical challenge. Resonant electro-optic transduction via three-wave mixing is an attractive solution, with a simple operating principle that does not rely on intermediate quantum states. However, the intrinsic optical and microwave losses of electro-optic materials with large Pockels coefficients have limited the conversion efficiency of existing devices. Here, we show that an optimal conversion efficiency can be achieved with a relatively weak linear electro-optic material, as long as both the optical and microwave quality factors are high. We then discuss specific designs for electro-optic quantum transducers based on superconducting microwave resonators coupled to SiGe/Si ring resonators. We theoretically show that applying an electric field to the SiGe/Si waveguides induces an effective Pockels effect, allowing three-wave mixing without introducing loss. Together with its exc...

中文翻译：

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SiGe / Si波导中的工程电光学用于量子转导

用于量子态转移的高效微波光学转导仍然是一项严峻的技术挑战。通过三波混合的共振电光转导是一种有吸引力的解决方案，其简单的工作原理不依赖于中间量子态。然而，具有大普克尔斯系数的电光材料固有的光学和微波损耗限制了现有设备的转换效率。在这里，我们表明，只要光学和微波品质因数都很高，就可以用相对较弱的线性电光材料实现最佳转换效率。然后，我们讨论基于耦合到SiGe / Si环形谐振器的超导微波谐振器的电光量子换能器的特定设计。从理论上讲，我们向SiGe / Si波导施加电场会产生有效的普克尔斯效应，从而实现三波混合而不会引起损耗。连同它的附件