Cavity-induced entanglement of trapped ions

空腔引起的俘获离子纠缠

• 批准号: 2129627
• 金额: --
• 依托单位: University of Sussex
• 依托单位国家: 英国
• 项目类别: Studentship
• 财政年份: 2018
• 资助国家: 英国
• 起止时间: 2018 至 无数据
• 项目状态: 已结题
• 来源: https://gtr.ukri.org/projects?ref=studentship-2129627
• 关键词: Cavity; induced; entanglement; trapped; ions

The project unites two distinct areas of quantum information processing, single ions stored in radio-frequency traps, and single photons in optical fibres. In both fields, there have been spectacular advances recently. Strings of ions are presently the most successful implementation of quantum computing, with elementary quantum algorithms and quantum simulations realized. Photons are used to distribute entanglement over ever increasing distances. The principal challenge in the field is to enhance quantum processing power by scaling up current devices to larger quantum systems. We are pursuing the of the most promising strategies, distributed quantum computation, in which multiple small-scale ion processors are interlinked by exchanging photonic quantum bits via optical fibres. It requires an efficient quantum interface between ions and photons, mapping ionic to photonic quantum states and vice versa. To maximise fidelity and the success rate of the scheme, the interaction of ions and photons must take place in an optical cavity with high finesse, a technology in which the Ion Trap Cavity-QED and Molecular Physics group in Sussex has a leading role. The aim of this project is to investigate, optimise and evaluate schemes to generate entangled states between trapped ions and photons in different implementations such as polarisation, time bin or phase decoding. For this, cavity assisted Raman transitions will be employed to transfer the ion's state onto the photon in a deterministic way. The project is mainly experimental and will be conducted in the research labs in Sussex, the theoretical study of the schemes and possible developments of novel schemes will be pursued in collaboration with Peter Horak, University of Southampton.

该项目结合了量子信息处理的两个不同领域：存储在射频陷阱中的单离子和光纤中的单光子。最近这两个领域都取得了惊人的进展。离子串是目前量子计算最成功的实现，实现了基本量子算法和量子模拟。光子用于在不断增加的距离上分布纠缠。该领域的主要挑战是通过将当前设备扩展到更大的量子系统来增强量子处理能力。我们正在追求最有前途的策略，即分布式量子计算，其中多个小型离子处理器通过光纤交换光子量子位来互连。它需要离子和光子之间的有效量子界面，将离子量子态映射到光子量子态，反之亦然。为了最大限度地提高方案的保真度和成功率，离子和光子的相互作用必须在高精度的光学腔中进行，苏塞克斯的离子阱腔 QED 和分子物理小组在这项技术中发挥了主导作用。该项目的目的是研究、优化和评估在不同实现（例如偏振、时间仓或相位解码）中生成捕获离子和光子之间纠缠态的方案。为此，将采用腔辅助拉曼跃迁以确定的方式将离子的状态转移到光子上。该项目主要是实验性的，将在苏塞克斯的研究实验室进行，该方案的理论研究和新颖方案的可能开发将与南安普顿大学的 Peter Horak 合作进行。