CAREER: Josephson Quantum Optics with Coherent Microwave Light

职业：约瑟夫森量子光学与相干微波光

• 批准号: 1847025
• 负责人: Michael Hatridge
• 金额: $ 55.64万
• 依托单位: University of Pittsburgh
• 依托单位国家: 美国
• 项目类别: Continuing Grant
• 财政年份: 2019
• 资助国家: 美国
• 起止时间: 2019-09-01 至 2024-08-31
• 项目状态: 已结题
• 来源: https://www.nsf.gov/awardsearch/showAward?AWD_ID=1847025&HistoricalAwards=false
• 关键词: CAREER; Josephson; Quantum; Optics; Coherent

Quantum computers promise to run algorithms which are exponentially faster than their fastest known classical counterparts, as well as simulate general quantum systems. This is especially exciting in the fields of biology and chemistry where understanding complex molecules may open new avenues, for instance in drug discovery and solar cells, as well as basic research. A number of physical platforms for quantum computing exist, with two of the leading methods being optical-frequency light interacting with atomic systems (known as quantum optics) and microwave-frequency light interacting with superconducting, Josephson-junction based circuits. While each method has unique virtues, neither is yet capable of realizing large-scale quantum machines. Further, the two platforms cannot be readily combined in a single quantum circuit due to their vastly different frequencies of operation and materials requirements. This CAREER project will leverage the extreme flexibility of superconducting circuits to adapt techniques and concepts from quantum optics into a new series of hybrid devices which may be referred to as "Josephson Quantum Optics". This project will produce devices which can power a new generation of quantum machines, as well as support graduate student training in cutting-edge quantum microwave design techniques. Superconducting quantum circuits, which combine low-loss superconducting microwave elements with the nonlinear inductance of Josephson junctions, are a leading platform for realizing quantum machines, having made great progress in recent years in demonstrating the basic requirements of quantum computing. Large scale, error-free quantum computers, however, require encoding their bits of information logically across a number of physical bits so that no single error can destroy them, resulting in a huge expansion in the number of circuit elements required to build a quantum computer. An architecture in which quantum elements are linked over long distances (a specialty of the field of atomic physics and quantum optics), rather than only to their nearest neighbors, can greatly reduce the hardware overhead required to correct errors. This project will draw heavily from concepts in optical-frequency quantum optics as well as bath engineering to develop devices which generate and detect novel states of quantum light in ways that are tolerant of loss and circuit imperfections. Project research aims include the development of dc-driven highly-coherent qubit-based micromasers and an absorptive, highly-efficient Fock-state detector. The devices and concepts proposed here will advance our ability to build large, error corrected superconducting circuits.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.

量子计算机有望运行比其最快已知的经典同行的算法，并模拟通用量子系统。这在生物学和化学领域尤其令人兴奋，其中理解复杂分子可能打开新的途径，例如在药物发现和太阳能电池以及基础研究中。 存在许多用于量子计算的物理平台，其中两种领先的方法是与原子系统（称为量子光学器件）相互作用的光频光，而微波频率光与超导相互作用的基于约瑟夫森 - 基于基于约瑟夫森 - 基于基于的电路。 尽管每种方法都有独特的美德，但尚未能够实现大型量子机。此外，由于操作和材料要求的频率截然不同，因此两个平台无法在单个量子电路中轻易合并。 该职业项目将利用超导电路的极端灵活性将量子光学的技术和概念调整为一系列新的混合设备，这些设备可能称为“ Josephson Quantum Optics”。 该项目将生产可以为新一代量子机提供动力的设备，并支持尖端量子微波设计技术的研究生培训。 超导量子电路将低损耗的超导微波元件与约瑟夫森连接的非线性电感结合在一起，是实现量子机的领先平台，近年来在证明量子计算的基本要求方面取得了长足的进步。 但是，大规模的，无错误的量子计算机需要在许多物理位上逻辑地编码它们的信息位，以便没有任何单个错误可以破坏它们，从而导致构建量子计算机所需的电路元素数量大大扩展。 量子元素在长距离（原子理和量子光学领域的特殊性）上链接的一个结构，而不仅仅是与他们最近的邻居，可以大大减少纠正错误所需的硬件开销。 该项目将大力从光学频率量子光学的概念以及浴室工程中汲取灵感，以开发设备，这些设备以容忍和电路缺陷的方式生成和检测量子光的新型状态。 项目研究的目的包括开发由DC驱动的高度量子量子量的微震剂和吸收性，高效的Fock-State探测器的开发。这里提出的设备和概念将提高我们建立大型，错误纠正的超导电路的能力。该奖项反映了NSF的法定任务，并被认为是值得通过基金会的知识分子优点和更广泛的影响评估标准来通过评估来支持的。