近日，美国德州农工大学的Yusef Maleki与M. Suhail Zubairy合作并取得一项新进展。经过不懈努力，他们成功制定纠缠辅助动态速度增强的通用准则。相关研究成果已于2024年11月12日在国际知名学术期刊《物理评论A》上发表。
据悉，量子速度极限为量子过程的速度设定了基本阈值，是量子科学广泛应用领域的核心，这些应用包括加快量子计算中的门操作、优化通信通道以及揭示多体系统中关联的传播速率等。
在追求定制最优量子动力学速度的过程中，量子纠缠在某些特定情况下已展现出其重要作用。然而，系统纠缠与其动力学速度之间稳健且普遍的联系仍然难以捉摸。
该研究团队通过制定通用标准来确定，量子系统内速度提升的真正量子纠缠贡献。具体而言，研究人员设定了一个严格限制可分离状态动力学演化速度的上限，为这些状态提供了一个无法达到的速度阈值。这项研究结果凸显了量子纠缠超越这一极限的能力，证明了其作为提升系统动力学速度资源的潜力。
附：英文原文
Title: Universal criteria for entanglement-assisted dynamical speed enhancement
Author: Yusef Maleki, M. Suhail Zubairy
Issue&Volume: 2024/11/12
Abstract: Quantum speed limits, establishing fundamental thresholds for the speed of quantum processes, are central to a wide spectrum of applications of quantum science, ranging from speeding up gate operations in quantum computations and optimizing communication channels to unraveling the rate at which correlations can propagate within many-body systems. In the quest to tailor optimal quantum dynamical speeds, the role of quantum entanglement has been showcased in specific instances. However, a robust universal link between system entanglement and its dynamical speed remains elusive. Here, we formulate the genuine contribution of quantum entanglement by developing universal criteria determining this speed enhancement within a quantum system. Specifically, we establish an upper limit that rigorously bounds the speed of the dynamical evolution of separable states, providing an unattainable speed threshold for these states. Our findings underscore the capacity of quantum entanglement to surpass this limit, demonstrating its capability as a resource for enhancing dynamical speed of the system.
DOI: 10.1103/PhysRevA.110.052415
Source: https://journals.aps.org/pra/abstract/10.1103/PhysRevA.110.052415