近日，辽宁大学的Yusuf Turek及其研究团队取得一项新进展。他们进行了指针诱导量子退相干与弱到强测量跃迁关系的理论研究。相关研究成果已于2024年12月23日在国际知名学术期刊《物理评论A》上发表。

本文深入探讨了指针诱导的量子退相干，以及冯·诺依曼的投影强测量与阿哈罗诺夫的弱测量跃迁这两个关键方面。这两种现象对量子测量过程的动态理解具有重要影响。

具体而言，研究人员在一个通用模型中推导并比较了，量子退相干和弱测量到强测量跃迁因子，并以著名的斯特恩-盖拉赫实验为例进行了说明，从而聚焦于量子退相干与弱测量，到强测量跃迁之间的相互作用。

这项研究结果表明，这两种现象都可以通过一个与被测系统与指针之间，耦合紧密相关的通用因子来有效表征。本文的分析有助于阐明指针诱导的量子退相干，与弱测量以及弱测量到强测量跃迁之间关系的机制。

附：英文原文

Title: Theoretical investigation of the relations between pointer-induced quantum decoherence and the weak-to-strong measurement transition

Author: Xiao-Feng Song, Shuang Liu, Xi-Hao Chen, and Yusuf Turek*

Issue&Volume: 2024-12-23

Abstract: This paper delves into the crucial aspects of pointer-induced quantum decoherence and the transition between von Neumann's projective strong measurement and Aharonov's weak measurement. Both phenomena significantly impact the dynamical understanding of quantum measurement processes. Specifically, we focus on the interplay between quantum decoherence and the transition from weak to strong measurement by deducing and comparing the quantum decoherence and weak-to-strong measurement transition factors within a general model and using the well-known Stern-Gerlach experiment as an illustrative example. Our findings reveal that both phenomena can be effectively characterized by a universal factor intricately linked to the coupling between the measured system and the pointer. The analysis presented in our current work can clarify the mechanism behind the relations of pointer-induced quantum decoherence to the weak measurement and weak-to-strong measurement transition.

DOI: 10.1103/PhysRevA.110.062217

Source: https://journals.aps.org/pra/abstract/10.1103/PhysRevA.110.062217