印度霍米巴巴国家研究所Arun Kumar Pati团队研究了可观测量子性产生的量子速度限制。2025年2月27日，《物理评论A》发表了这一成果。

量子系统的非经典特征在受到环境和噪声的影响时会退化。在此衍生一个基本问题：在存在噪声的情况下，量子系统表现出非经典特征所需的最小时间是多少？

研究组证明了可观测量的不同速度限制是两个给定可观测量整流子的范数。这种定量测量的速度限制设定了定量变化率的基本上限，该上限提供了将系统的定量变化一定量所需时间的下限。此外，研究组证明了非经典特征的速度限制，如量子相干性，它捕获了量子系统中的叠加量。该成果证明了物理过程上限的可达性，并通过示例验证了其严密性。

附：英文原文

Title: Quantum speed limit on the production of quantumness of observables

Author: Divyansh Shrimali, Swapnil Bhowmick, Arun Kumar Pati

Issue&Volume: 2025/02/27

Abstract: Nonclassical features of quantum systems can degrade when subjected to environment and noise. Here, we ask a fundamental question: What is the minimum amount of time it takes for a quantum system to exhibit nonclassical features in the presence of noise Here, we prove distinct speed limits on the quantumness of observable as the norm of the commutator of two given observables. The speed limit on such quantumness measures sets the fundamental upper bound on the rate of change of quantumness, which provides the lower bound on the time required to change the quantumness of a system by a given amount. Additionally, we prove the speed limit for the nonclassical features such as quantum coherence that captures the amount of superposition in the quantum systems. We demonstrate the attainability of the upper bounds for processes of physical interest and verify their tightness through illustrated cases.

DOI: 10.1103/PhysRevA.111.022445

Source: https://journals.aps.org/pra/abstract/10.1103/PhysRevA.111.022445