EAGER: QIA: A quantum algorithm for detecting quantum information leakage in qubit systems

EAGER：QIA：一种用于检测量子位系统中量子信息泄漏的量子算法

• 批准号: 2037300
• 负责人: Amir Kalev
• 金额: $ 20万
• 依托单位: University of Southern California
• 依托单位国家: 美国
• 项目类别: Standard Grant
• 财政年份: 2021
• 资助国家: 美国
• 起止时间: 2021-01-01 至 2023-12-31
• 项目状态: 已结题
• 来源: https://www.nsf.gov/awardsearch/showAward?AWD_ID=2037300&HistoricalAwards=false
• 关键词: EAGER; QIA; quantum; algorithm; detecting

In quantum computers, information is encoded in quantum bits, that is, qubits. Ideally a qubit is a two-level quantum system, representing the logical states "0" and "1". In the two leading quantum computing platforms, superconducting flux qubit and trapped ions, quantum information encoded in the qubit is prone to leakage. As a consequence, information leakage is one of the main sources of errors that affect our ability to perform successful computing on near-term quantum computing devices. This project develops and experimentally tests a novel quantum algorithm for detecting specific leakage errors in qubit systems by harnessing entanglement, which are the strong correlations in quantum systems. Thanks to these strong correlations, the algorithm allows an accurate detection of the leakage errors with substantially fewer experimental runs than required by state-of-the-art leakage detection protocols. Efficiently and precisely detecting specific information leakage errors is crucial for the current advancement of state-of-the-art quantum computing platforms, and in turn increases our ability to perform more precise quantum computing tasks with relevance throughout science and engineering. The scientific goals of this project is to develop quantum algorithm for detecting potential leakage channels by using strongly-correlated (entangled) bipartite quantum systems. The correlations between the systems are specifically designed to probe and detect particular leakage error channels. The algorithm is suitable and has the flexibility to detect any leakage channel of concern; it is deterministic and allows one to detect the specific leakage channels with probability one. The PIs and the student involved in this project are testing and benchmarking the algorithm on currently available quantum computing devices. The successful development and implementation of a leakage detection algorithm thus enhances our ability to suppress them, and in turn enhances the performance of currently available quantum computing platforms.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.

在量子计算机中，信息被编码为量子位，即量子位。理想情况下，量子位是一个两级量子系统，代表逻辑状态“0”和“1”。在超导通量量子位和俘获离子这两个领先的量子计算平台中，量子位中编码的量子信息很容易泄漏。 因此，信息泄漏是影响我们在近期量子计算设备上成功执行计算的能力的主要错误来源之一。该项目开发并实验测试了一种新颖的量子算法，用于通过利用纠缠（量子系统中的强相关性）来检测量子位系统中的特定泄漏错误。由于这些强相关性，该算法可以准确检测泄漏错误，并且比最先进的泄漏检测协议所需的实验次数少得多。高效、精确地检测特定的信息泄漏错误对于当前最先进的量子计算平台的进步至关重要，反过来又提高了我们执行与整个科学和工程相关的更精确的量子计算任务的能力。该项目的科学目标是开发量子算法，通过使用强相关（纠缠）二分量子系统来检测潜在的泄漏通道。系统之间的相关性专门设计用于探测和检测特定的泄漏误差通道。该算法适用且能够灵活地检测任何关注的泄漏通道；它是确定性的，允许人们以概率 1 检测特定的泄漏通道。参与该项目的 PI 和学生正在当前可用的量子计算设备上测试该算法并对其进行基准测试。因此，泄漏检测算法的成功开发和实施增强了我们抑制泄漏的能力，进而提高了当前可用量子计算平台的性能。该奖项反映了 NSF 的法定使命，并通过使用基金会的智力优势和更广泛的影响审查标准进行评估，被认为值得支持。