Collaborative Research: Quantum acoustics for optomechanical transduction and entanglement of solid-state spin qubits

合作研究：用于光机械传导和固态自旋量子位纠缠的量子声学

• 批准号: 2006103
• 负责人: Mo Li
• 金额: $ 46.23万
• 依托单位: University of Washington
• 依托单位国家: 美国
• 项目类别: Standard Grant
• 财政年份: 2020
• 资助国家: 美国
• 起止时间: 2020-05-01 至 2023-04-30
• 项目状态: 已结题
• 来源: https://www.nsf.gov/awardsearch/showAward?AWD_ID=2006103&HistoricalAwards=false
• 关键词: Collaborative; Research; Quantum; acoustics; optomechanical

Future quantum computers will need to utilize different physical types of qubits that need to communicate and convert between each other with high fidelity and high efficiency. While photons are ideal for quantum communication, different qubit systems couple to photons of vastly different frequency ranges. The strain field generated by the mechanical wave in a solid-state material is a promising approach to enable coupling with a broad range of qubits with theoretically high efficiency. With a traveling velocity of five orders of magnitude lower than photons, acoustic waves are ideal for quantum interconnect between multiple qubits. The quantum acoustic technology developed in this project and the integration with NV-defect center qubits is an essential first step toward a chip-scale hybrid, multiple qubit systems. The proposed research both addresses the imminent issue of frequency inhomogeneity that has been plaguing solid-state optical qubits and explores the frontier of strong coupling of mechanical modes with spin qubits. The project will make significant advances from previous studies of discrete systems to realizing a monolithic quantum system that includes waveguides, optical and acoustic cavities, and acoustic transducers to directly interface with qubits, all integrated on a novel material platform. The approach offers a path to the realization of the integrated quantum computing system based on hybrid solid-state qubits interconnected with photons and phonons. The research leverages the tremendous technological development in the acoustic MEMS technology and advances it to the quantum regime, with the potential outcome that can impact both quantum information science and microwave photonics for classical communication. Education and outreach activities aim to increase the participation of students from underrepresented groups and improve the diversity of the STEM workforce and include course development in advanced quantum computing and K-12 science outreach programs with publicly accessible online courses. Technical Abstract:The project aims to develop a novel integrated quantum acoustic device platform for optomechanical transduction and quantum state manipulation of solid-state spin qubits based on defect centers in diamond. The integrated devices will be built on the high-performance heterogeneous material platform of gallium phosphide (GaP) on the crystalline diamond. The platform uniquely utilizes the layer of piezoelectric GaP for the dual functions of optical waveguiding and acoustic wave generation and guiding, thereby to achieve tremendously enhanced acousto-optic interaction. The effort will include three main thrusts. The first thrust will realize integrated acousto-optic frequency shifter (AOFS) to address the optical frequency inhomogeneity problem of qubits based on defect centers. AOFS can achieve single-sideband, carrier-suppressed frequency shift of photons from qubits freely over a range of ±3GHz and with an efficiency better than 80%. The second thrust will investigate the coupling of itinerant acoustic waves to ensembles and single defect centers. The acoustic coupling strength will be enhanced to reach the strong coupling regime and realize time-dependent control over the states of the qubits. The final thrust will realize the strong coupling of acoustic modes confined in a high-Q cavity with single defect centers embedded therein. Quantum state manipulation and quantum entanglement of the qubits by utilizing the acoustic mode will be achieved. Ensembles of NV-centers coupled to the cavity acoustic mode in the strong-coupling regime and novel physics effects in this regime will be explored.This award reflects NSF's statutory mission and has been deemed worthy of support through evaluation using the Foundation's intellectual merit and broader impacts review criteria.

未来的量子计算机将在每个速度和高效率之间进行不同的物理类型，而光子是固定材料中机械波产生的应变场的理想选择。与广泛的理论相结合。 - fefect退出是一个迈向芯片尺度hybit的第一步，这两者都是困扰固态调子的两者都俩都俩都探索了带有自旋Qubits的机械模式的边界。 ICANT从离散系统的可有效研究到实现整体量子系统的触摸，包括光学和声学界限，以及与Qubits直接接口的声音，所有材料平台都为实现Intega提供了途径基于混合固态的系统，用于经典沟通的声学男士crowave photonics ：用于验光量的量子设备平台，用于基于设备的固态自旋Qubits的TUM状态操纵，将建立在高性能的异质材料的Sphide（GAP）上，该平台利用了晶体钻石的平台。光学和指南的双重函数的差距会增强声音相互作用。 ％。 S.最终推力将在嵌入其中的单个缺陷中心中限制在高Q腔中的强烈耦合。将探讨该制度中的强耦合体系和新颖的物理效应。该奖项反映了NSF'Stututs通过使用Toundatual功绩和ER影响审查标准来评估值得支持。

项目成果

Tunable phononic coupling in excitonic quantum emitters

• DOI: 10.1038/s41565-023-01410-6
• 发表时间: 2023-06-01
• 期刊: NATURE NANOTECHNOLOGY
• 影响因子: 38.3
• 作者: Ripin，Adina;Peng，Ruoming;Li，Mo
• 通讯作者: Li，Mo