Quantum algorithms have demonstrated provable speedups over classical counterparts,yet establishing a comprehensive theoretical framework to understand the quantum advantage remains a core challenge.In this work,we de...Quantum algorithms have demonstrated provable speedups over classical counterparts,yet establishing a comprehensive theoretical framework to understand the quantum advantage remains a core challenge.In this work,we decode the quantum search advantage by investigating the critical role of quantum state properties in random-walk-based algorithms.We propose three distinct variants of quantum random-walk search algorithms and derive exact analytical expressions for their success probabilities.These probabilities are fundamentally determined by specific initial state properties:the coherence fraction governs the first algorithm’s performance,while entanglement and coherence dominate the outcomes of the second and third algorithms,respectively.We show that increased coherence fraction enhances success probability,but greater entanglement and coherence reduce it in the latter two cases.These findings reveal fundamental insights into harnessing quantum properties for advantage and guide algorithm design.Our searches achieve Grover-like speedups and show significant potential for quantum-enhanced machine learning.展开更多
违章查询是交通管理部门提供的一项便民服务,方便驾驶人对违章信息进行在线查询及处理。移动互联网发展快速、移动设备种类繁多且设备资源有限,为解决移动互联网背景下异构客户端的违章查询服务接入和高并发服务性能问题,提出一种基于Ex...违章查询是交通管理部门提供的一项便民服务,方便驾驶人对违章信息进行在线查询及处理。移动互联网发展快速、移动设备种类繁多且设备资源有限,为解决移动互联网背景下异构客户端的违章查询服务接入和高并发服务性能问题,提出一种基于Express的违章查询REST Web Service解决方案,为交通管理部门和用户提供便捷高效的违章查询服务。通过Apache JMeter进行压力测试,实验结果表明,该方法实现简单,有效地提高了违章查询服务的扩展性和系统性能。展开更多
基金supported by the Fundamental Research Funds for the Central Universities,the National Natural Science Foundation of China(Grant Nos.12371132,12075159,12171044,12071179,and 12405006)the specific research fund of the Innovation Platform for Academicians of Hainan Province.
文摘Quantum algorithms have demonstrated provable speedups over classical counterparts,yet establishing a comprehensive theoretical framework to understand the quantum advantage remains a core challenge.In this work,we decode the quantum search advantage by investigating the critical role of quantum state properties in random-walk-based algorithms.We propose three distinct variants of quantum random-walk search algorithms and derive exact analytical expressions for their success probabilities.These probabilities are fundamentally determined by specific initial state properties:the coherence fraction governs the first algorithm’s performance,while entanglement and coherence dominate the outcomes of the second and third algorithms,respectively.We show that increased coherence fraction enhances success probability,but greater entanglement and coherence reduce it in the latter two cases.These findings reveal fundamental insights into harnessing quantum properties for advantage and guide algorithm design.Our searches achieve Grover-like speedups and show significant potential for quantum-enhanced machine learning.
文摘违章查询是交通管理部门提供的一项便民服务,方便驾驶人对违章信息进行在线查询及处理。移动互联网发展快速、移动设备种类繁多且设备资源有限,为解决移动互联网背景下异构客户端的违章查询服务接入和高并发服务性能问题,提出一种基于Express的违章查询REST Web Service解决方案,为交通管理部门和用户提供便捷高效的违章查询服务。通过Apache JMeter进行压力测试,实验结果表明,该方法实现简单,有效地提高了违章查询服务的扩展性和系统性能。
