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: 2423960
• 负责人: Chengzhi Shi
• 金额: $ 38.34万
• 依托单位: Regents of the University of Michigan - Ann Arbor
• 依托单位国家: 美国
• 项目类别: Standard Grant
• 财政年份: 2024
• 资助国家: 美国
• 起止时间: 2024-01-01 至 2024-12-31
• 项目状态: 已结题
• 来源: https://www.nsf.gov/awardsearch/showAward?AWD_ID=2423960&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.

该补助金将支持研究，将有助于通过经典和量子力学结构的非线性动力学和波传播相关的新知识，这对声子量子计算至关重要。目前最先进的量子计算机以前所未有的速度完成复杂的计算;然而，它们需要非常低的工作温度，限制了它们的实际应用。此外，目前缺乏能够处理声子量子信息的成熟的隧道结，限制了声子量子计算的进展。双稳态结构是实现机械隧穿结的一种很有前途的方法，因为在纳米尺度下，它们的能垒接近单个声子的能量。该奖项支持基础研究，以提供有关这些新型隧道结的发展所需的经典和量子力学双折射结构的非线性动力学知识。这些隧道结将用于处理和计算由单个声子携带的量子信息，并将极大地推进室温量子计算技术。这种能力将推进动力学，量子物理学，纳米科学和纳米纤维的知识。由于科学、国防和工业对高性能计算的迫切需求，这项研究将使美国社会受益。这项多学科研究将扩大在科学和工程中代表性不足的群体的参与，并积极影响STEM教育。本研究的目标是研究经典和量子机制下的基本非线性动力学和波通过机械隧道结构的传输，以实现其作为机械隧道结的潜在应用。这种机械隧道结将处理量子比特，这对使用声子的量子计算平台至关重要。本研究的中心假设是，如果结构由非线性和非接触保守相互作用驱动，则纳米级的双折射结构可以以足够高的传输效率传输机械波（声子），以充当量子隧穿结。这一假设将在经典和量子两种情况下进行检验：1）描述具有接触相互作用和非线性保守的宏观尺度微元的瞬变动力学和波传输（非接触）相互作用，2）从理论上和实验上评估通过微尺度结构的机械波（声子）传输效率，以及3）展示声子隧穿通过机械隧穿结的量子动力学。该奖项反映了NSF的法定使命，并通过使用基金会的智力价值和更广泛的影响审查标准进行评估，被认为值得支持。