Optoelectromechanical Interface in Hybrid Quantum Networks: Nonreciprocal State Conversion and Pulse Shaping

该项目将研究量子信息通过光电接口从微波电子器件到光学元件的转换。在这些设备之间传递高保真的信息(有时称为状态转换)将有助于构建混合量子网络，这是量子计算机的一种形式。与其他一些拟议的量子计算机体系结构相比，这种混合网络可以更容易地扩大规模，而且它们的设计旨在利用其组件子系统的各种优势。由于机械运动可以在从声波到光波的频率范围内与电磁场耦合，由机械谐振器和腔光子组成的光机电接口为推进这一目标提供了一个很有前途的候选方案。该项目将设计接口，利用这些接口可以单向传输量子信息，同时防止噪声传输。还将研究耦合的时间依赖性，以更好地设计光子脉冲的形状。理想的脉冲形状确保高保真的光子吸收或从量子比特检索信息。该项目还包括可扩大妇女和少数族裔学生参与的教育和STEM活动。这些活动包括课程开发、女性STEM讲座、学生物理学会活动和山猫日活动。技术说明。该项目支持通过混合光电接口实现微波和光学光子之间的量子态转换的研究。混合量子器件由截然不同的子系统组成。通过利用每个子系统的优势，混合设备可以促进可扩展量子计算机的构建。在连接微波和光频率的混合量子网络中，一个基本问题是如何在子系统之间实现量子信息的无噪声和无损传输。该项目的目标包括：(1)设计用于微波和光学光子之间的非互易态转换和路径选择的光电接口；(2)发展数值方法来控制通过光电接口传输的光子的脉冲形状。非互易状态转换控制状态流的方向，并防止噪声传播到量子网络的其他部分。该小组将设计在最佳条件下运行的非互易接口，并显著降低机械噪声。为了实现这一目标，将研究线性化轻物质耦合之间的有效规范相位。同时，入射光子的脉冲形状对于实现高保真存储或从量子比特恢复光子态至关重要。该团队将使用一种最优控制技术来设计与时间相关的电和光机械耦合，以实现理想的脉冲形状。这个项目可以提供对混合量子网络的潜力和限制的见解，并加深我们对量子接口在混合系统中的作用的理解。

This project will study the transformation of quantum information from microwave electronic devices to optical elements via opto-electromechanical interfaces. Passing information with high fidelity (sometimes called state-conversion) between these devices would facilitate the construction of a hybrid quantum network, a form of quantum computer. Such hybrid networks could be scaled up in size more easily than some other proposed quantum computer architectures, and they are designed to exploit the various strengths of their component subsystems. Because mechanical motion can be coupled to electromagnetic fields at frequencies ranging from acoustic to optical wavelengths, opto-electromechanical interfaces made of mechanical resonators and cavity photons provide a promising candidate to advance this goal. This project will design interfaces with which quantum information can be transmitted uni-directionally while simultaneously preventing noise transmission. The time-dependence of the couplings will also be studied to better engineer the shape of photon pulses. Ideal pulse shape ensures high-fidelity photon absorption or information retrieval from a quantum bit. This project also includes educational and STEM activities that can broaden the participation of women and minority students. These activities include course development, women-STEM lectures, Student Physics Society activities, and Bobcat day events. Technical description. This project supports the study of quantum state conversion between microwave and optical photons via hybrid optoelectromechanical interface. Hybrid quantum devices are composed of distinctively different subsystems. By exploiting the strength of each subsystem, hybrid devices can facilitate the construction of scalable quantum computers. An essential question in hybrid quantum networks bridging microwave and optical frequencies is how to achieve noiseless and lossless transmission of quantum information between the subsystems. The objectives of this project include (1) designing optoelectromechanical interfaces for nonreciprocal state conversion and routing between microwave and optical photons and (2) developing numerical methods to control the pulse shape of photons transmitted through optoelectromechanical interfaces. Nonreciprocal state conversion controls the direction of state flow and prevents noise from being spread to other parts of the quantum network. The group will design nonreciprocal interfaces operated under optimal conditions with significantly reduced mechanical noise. The effective gauge phase between the linearized light-matter couplings will be studied to achieve this goal. Meanwhile, the pulse shape of incoming photons is crucial for achieving high-fidelity storage or retrieval of photon state from a quantum bit. The team will use an optimal control technique to design time-dependent electro- and opto-mechanical couplings to achieve desirable pulse shape. This project can provide insights on the potential and limitation of hybrid quantum networks and deepen our understanding of the role of quantum interfaces in hybrid systems.