Collaborative Research: Nonlinear Dynamics and Wave Propagation through Phononic Tunneling Junctions based on Classical and Quantum Mechanical Bistable Structures

合作研究：基于经典和量子机械双稳态结构的声子隧道结的非线性动力学和波传播

• 批准号: 2314687
• 负责人: Dafei Jin
• 金额: $ 4.47万
• 依托单位: University of Notre Dame
• 依托单位国家: 美国
• 项目类别: Standard Grant
• 财政年份: 2022
• 资助国家: 美国
• 起止时间: 2022-10-01 至 2024-01-31
• 项目状态: 已结题
• 来源: https://www.nsf.gov/awardsearch/showAward?AWD_ID=2314687&HistoricalAwards=false
• 关键词: Collaborative; Research; Nonlinear; Dynamics; Wave

This grant will support research that will contribute new knowledge related to nonlinear dynamics and wave propagation through classical and quantum mechanical bistable structures, which is critical for phononic quantum computing. Current state-of-the-art quantum computers complete complex computations at unprecedented speeds; however, they require very low operating temperatures, limiting their practical use. Further, the current lack of a well-established tunneling junction capable of processing phononic quantum information limits progress in phononic quantum computing. Bistable structures are a promising approach for the realization of a mechanical tunneling junction because, at the nanoscale, their energy barrier approaches the energy of a single phonon. This award supports fundamental research to provide the knowledge regarding the nonlinear dynamics of classical and quantum mechanical bistable structures needed for the development of these novel tunneling junctions. These tunneling junctions will be used for processing and computing of quantum information carried by single phonons and will dramatically advance the technology of room-temperature quantum computing. This capability will advance knowledge in dynamics, quantum physics, nanoscience, and nanofabrication. This research will benefit U.S. society due to the critical need for high performance computing in science, defense and industry. This multi-disciplinary research will broaden the participation of underrepresented groups in science and engineering and positively impact STEM education.The objective of this research is to investigate the fundamental nonlinear dynamics and wave transmission through mechanical bistable structures in classical and quantum regimes for their potential application as mechanical tunneling junctions. Such mechanical tunneling junctions will process quantum bits, which is critical to quantum computing platforms using phonons. The central hypothesis of this research is that a nanoscale bistable structure can transmit mechanical waves (phonons) with a high enough transmission efficiency to act as a quantum tunneling junction if the structure is driven by nonlinear and contactless conservative interactions. This hypothesis will be tested in both classical and quantum regimes by 1) characterizing the snap-though dynamics and wave transmission of macroscale bistable elements with contact interactions and nonlinear conservative (contactless) interactions, 2) evaluating the mechanical wave (phonon) transmission efficiency through a micro-scale structure theoretically and experimentally, and 3) demonstrating the quantum dynamics of phonon tunneling through mechanical tunneling junction.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.

该赠款将支持研究的研究，该研究将通过经典和量子机械双态结构来促进与非线性动力学和波浪传播相关的新知识，这对于声音量子计算至关重要。当前的最新量子计算机以前所未有的速度完成复杂计算；但是，它们需要非常低的工作温度，从而限制了其实际使用。此外，目前缺乏完善的隧道连接，能够处理语音量子信息限制了声音量子计算中的进展。双态结构是实现机械隧道连接点的有前途的方法，因为在纳米级，它们的能量屏障接近单个声子的能量。该奖项支持基本研究，以提供有关这些新型隧道连接所需的经典和量子机械双态结构的非线性动力学的知识。这些隧道连接将用于处理和计算单个声子携带的量子信息，并将显着提高室温量子计算的技术。这种能力将提高有关动力学，量子物理，纳米科学和纳米制作的知识。由于对科学，国防和工业中高性能计算的迫切需要，这项研究将使美国社会受益。这项多学科研究将扩大代表性不足的群体在科学和工程中的参与，并积极影响STEM教育。该研究的目的是调查基本的非线性动力学和波动通过在经典和量子方案中的机械Bistable结构进行的传播，以便其作为机械隧道连接的潜在应用。这种机械隧道连接将处理量子位，这对于使用声子对量子计算平台至关重要。这项研究的中心假设是，如果结构是由非线性和非接触式的保守相互作用驱动的，则可以发射具有足够高的传输效率的机械波（声子），以充当量子隧道连接。该假设将通过1）在经典和量子制度中进行测试，以表征与接触相互作用的宏观动态和可传播的动态和波动传播，并通过接触互动和非线性保守性（无接触式）相互作用，2）评估机械波（声音波（声音））通过微观尺度结构的量子触发性的机械效率，并通过实验性的触发性，并通过实验性的触发性进行跨性能，并且该奖项反映了NSF的法定任务，并通过使用基金会的知识分子优点和更广泛的影响审查标准评估，被认为值得支持。