A hybrid atom-superconductor interface for quantum networking

用于量子网络的混合原子-超导体接口

• 批准号: 1918300
• 金额: --
• 依托单位: University of Strathclyde
• 依托单位国家: 英国
• 项目类别: Studentship
• 财政年份: 2017
• 资助国家: 英国
• 起止时间: 2017 至 无数据
• 项目状态: 已结题
• 来源: https://gtr.ukri.org/projects?ref=studentship-1918300
• 关键词: hybrid; atom; superconductor; interface; quantum

Hybrid quantum systems combine two or more disparate quantum technologies to harness their individual strengths and overcome the limitations of each qubit type. Superconducting circuits are promising candidates for quantum processors as they perform fast high-fidelity gate operations but have short coherence times. Neutral atoms have the potential to fulfill the requirement for coherent storage of quantum information. Atomic transitions occur in both, the microwave and optical frequency range. Therefore, nodular quantum systems consisting of memory and processor qubits could be connected via optical channels to form a quantum network. The properties of atoms in highly excited Rydberg states in theory enable microwave cavity mediated long-distance entanglement between atomic ensembles and highly directional photon emission.The aim of this project is to develop a high-fidelity interface between superconducting and photonic qubits to realise an expansive quantum networking architecture. The long-term goal of this research is to advance the progress of circuit-QED quantum computing approaches with the inclusion of coherent quantum information storage and microwave-to-optical conversion. Therefore, generation of a chip-based device where atoms are coupled to superconducting circuits via a superconducting microwave resonator enables and deterministic entanglement of photonic qubits. Trapping atomic ensembles above a superconducting coplanar waveguide (CPW) and generating long-distance entanglement remains experimentally challenging but is an essential requirement to build a scalable quantum network.

混合量子系统联合收割机结合了两种或更多种不同的量子技术，以利用它们各自的优势，并克服每种量子比特类型的限制。超导电路是量子处理器的有希望的候选者，因为它们执行快速高保真门操作，但相干时间短。中性原子具有满足量子信息相干存储要求的潜力。原子跃迁发生在微波和光学频率范围内。因此，由存储器和处理器量子位组成的结节量子系统可以通过光通道连接起来，形成量子网络。理论上，处于高激发里德堡态的原子的性质使微波腔介导的原子系综之间的长距离纠缠和高方向性光子发射成为可能。本项目的目标是在超导量子比特和光子量子比特之间开发高保真接口，以实现扩展的量子网络架构。这项研究的长期目标是推进电路QED量子计算方法的进展，包括相干量子信息存储和微波-光转换。因此，基于芯片的器件的产生，其中原子经由超导微波谐振器耦合到超导电路，使得能够实现光子量子比特的确定性纠缠。在超导共面波导（CPW）上方捕获原子系综并产生长距离纠缠仍然具有实验挑战性，但这是构建可扩展量子网络的基本要求。