中国科学技术大学郑炜团队近日研究了量子涨落下时空秩序的命运。该项研究成果发表在2025年6月23日出版的《物理评论A》杂志上。

量子涨落是多体物理学的基础，通常会改变量子相的性质，超出平均场的预测。在这项工作中，研究组探索了它们对腔玻色子系统中时空有序相位的影响，该相位之前在平均场框架内预测过。通过结合腔场的高阶量子涨落，研究组推导出了一组量子动力学方程，并对系统的动力学进行了数值分析。 

该结果表明，虽然平均场时空顺序随着时间的推移而消失，但振荡行为在量子涨落水平上仍然存在，表明相位以一种修改的形式存在。这项研究强调了量子涨落在非平衡量子系统中的重要性，并揭示了平均场方法在预测复杂量子相位稳定性方面的局限性。

附：英文原文

Title: Fate of the spatial-temporal order under quantum fluctuation

Author: Xiaotian Nie, Wei Zheng

Issue&Volume: 2025/06/23

Abstract: Quantum fluctuations are fundamental in many-body physics, often altering the nature of quantum phases beyond mean-field predictions. In this work, we explore their impact on a spatial-temporal ordered phase in a cavity-boson system, a phase previously predicted within the mean-field framework. By incorporating higher-order quantum fluctuations of the cavity field, we derive a set of quantum kinetic equations and numerically analyze the system's dynamics. Our results show that while mean-field spatial-temporal order vanishes over time, oscillatory behavior persists at the level of quantum fluctuations, demonstrating that the phase survives in a modified form. This study underscores the importance of quantum fluctuations in nonequilibrium quantum systems and reveals the limitations of the mean-field approach in predicting the stability of complex quantum phases.

DOI: 10.1103/hlwp-41yr

Source: https://journals.aps.org/pra/abstract/10.1103/hlwp-41yr