近日，波兰科学院理论物理中心的Jarosaw K. Korbicz与Tae-Hun Lee合作并取得一项新进展。他们揭示了玻色子自旋模型中的霍尔沃界和客观性。相关研究成果已于2024年12月2日在国际知名学术期刊《物理评论A》上发表。

据悉，量子系统中客观经典性质的涌现，可以用量子信息理论的现代语言来描述。在这项工作中，研究人员展示了一个此类分析的实例。研究人员将量子信道理论应用于开放量子系统的玻色子-自旋模型，并利用无反冲近似和弗洛凯理论计算了霍尔沃量（Holevo量），该量界定了信道将中心系统的信息传播到其环境中的能力。

研究人员分析了短时区间，展示了容量随时间呈二次方初始增长的情况，同时也研究了渐近区间。他们还分析了模型参数（如温度、环境的隧穿能量等）的复杂依赖性，并展示了霍尔沃界达到最大值的区间等结果。

附：英文原文

Title: Holevo bound and objectivity in the boson-spin model

Author: Tae-Hun Lee, Jarosaw K. Korbicz

Issue&Volume: 2024/12/02

Abstract: Emergence of objective, classical properties in quantum systems can be described in the modern language of quantum information theory. In this work, we present an example of such an analysis. We apply the quantum channel theory to a boson-spin model of open quantum systems and calculate, using recoilless approximation and the Floquet theory, the Holevo quantity, which bounds the capacity of the channel, broadcasting information about the central system into its environment. We analyze both the short-time regime, showing quadratic in time initial growth of the capacity, and the asymptotic regime. Complicated dependence on the model parameters, such as temperature, tunneling energy for the environment, etc., is also analyzed, showing, e.g., regimes where the Holevo bound reaches its maximum.

DOI: 10.1103/PhysRevA.110.062202

Source: https://journals.aps.org/pra/abstract/10.1103/PhysRevA.110.062202