We study the effect of dephasing on the spin-mixing dynamics of a spinor Bose–Einstein condensate. We focus on a short-time dynamics and derive an analytical dynamics equations for the system by using mean-field approximation. We show the spin-mixing is suppressed via a quantum Zeno effect (QZE) in which the phase-noise intensity is much stronger than the inverse correlation time of the stimulated process. We also investigate the spin-nematic squeezing in the process of spin-mixing dynamics and show the squeezing is restrained by the QZE.

中文翻译：

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自旋玻色-爱因斯坦凝聚中自旋混合和挤压的量子芝诺控制

我们研究了移相对自旋玻色-爱因斯坦凝聚体的自旋混合动力学的影响。我们专注于短时动力学，并通过使用平均场近似推导出系统的解析动力学方程。我们展示了通过量子芝诺效应（QZE）抑制自旋混合，其中相位噪声强度比受激过程的逆相关时间强得多。我们还研究了自旋混合动力学过程中的自旋向列挤压，并表明挤压受到 QZE 的抑制。