由双色场产生电子-正电子对中的涡旋结构
Vortex structures in electron-positron pair production by two-colored fields
AI总结：
研究双色电磁场中真空产生电子-正电子对的自旋分辨涡旋特性，揭示时间延迟参数G从0到0.5时动态转变，揭示拓扑结构的阶梯排列及自旋轨道选择规则对动量空间形态的约束。
摘要：
我们研究了由时间延迟的双色电磁场从真空产生电子-正电子对的自旋分辨涡旋特性。通过将时间延迟G视为连续调节参数，我们揭示了从G=0时的干涉主导域模式转变为G=0.5时量子化涡旋晶格的形成。这些拓扑结构表现出类似于流体动力学中von Karman涡街的阶梯排列。我们证明动量空间形态严格受自旋轨道选择规则支配，即平行自旋配置强制偶极形连接，而反平行配置解析为不同的四极结构。这种差异源于总角动量Jz的守恒，其中自旋投影决定了生成对的所需轨道角动量Lz。在大延迟（G大于1）时，宏观涡旋相干性因多通道干涉溶解为混沌相景观，但自旋依赖的节点几何结构仍保持稳健。我们的发现表明，这些拓扑特征为强场QED真空激发的量子动力学提供了高保真度的诊断。
英文摘要：
We investigate the spin resolved vortex properties of electron positron pairs created from vacuum in time delayed, two color electromagnetic fields. By treating the temporal delay G as a continuous tuning parameter, we reveal a dynamic transition from interference-dominated domain patterns at G=0 to the nucleation of quantized vortex lattices at G=0.5. These topological structures exhibit a staggered arrangement analogous to von Karman vortex streets in fluid dynamics. We demonstrate that the momentum-space morphology is strictly governed by spin orbit selection rules, i.e., parallel spin configurations enforce a dipole-like connectivity, while anti-parallel configurations resolve into distinct quadrupole structures. This difference originates from the conservation of total angular momentum Jz, where the spin projection determines the required orbital angular momentum Lz of the created pairs. At large delays (G greater than 1), macroscopic vortex coherence dissolves into a chaotic phase landscope due to multi-channel interference, yet the spin-dependent nodal geometries remain robust. Our findings suggest that these topological signatures provide a high-fidelity diagnostic for the quantum dynamics of vacuum excitations in strong field QED.
机构、总结、中文摘要均由AI分析而来，可能存在错误，请以论文正文为准。
