近日，塔里木大学Hongbiao Li团队研究了量子演化的干涉功率。2026年5月5日，相关成果发表在《物理评论A》杂志上。
干涉功率（IP）量化了黑箱干涉测量中最坏情况下的量子费舍信息（QFI），其中局域编码哈密顿量具有固定的谱但本征基未知。
对于作为双量子比特酉门输入的经典-经典态，研究组采用对称化干涉功率的最大值来量化该门的干涉功率生成能力。利用卡当分解，该数值计算结果表明，具有三轴各向同性耦合的酉门能够达到对称化干涉功率的最大值。有趣的是，在对抗性传感中，干涉功率比量子纠缠是一种更经济的资源。
附：英文原文
Title: Interferometric power of quantum evolutions
Author: Guoqiang Jin, Jiajun Zhou, Weiye Feng, Guoping Sun, Hongbiao Li, Hongying Yang, Qiang Zheng
Issue&Volume: 2026/05/05
Abstract: Interferometric power (IP) quantifies the worst-case quantum Fisher information (QFI) achieved in a black-box interferometry, where the local encoding Hamiltonian has a fixed spectrum but an unknown eigenbasis. For classical-classical states as inputs for a two-qubit unitary gate, we adopt the maximum value of the symmetrized IP to quantify its IP-generation capability. Using the Cartan decomposition, our numerical results show that the unitary gates with the three-axis isotropic couplings can attain the maximum value of the symmetrized IP. Interestingly, IP is a more economical resource than quantum entanglement in adversarial sensing.
DOI: 10.1103/fmp5-9jd3
Source: https://journals.aps.org/pra/abstract/10.1103/fmp5-9jd3