In a subject of ‘optical angular momentum (OAM) and optical vortex’, a twisted light (also referred to as a ‘spiralling optical field’) possesses a helical wavefront. Recently, a new advance in the twisted light is Rego et al 's discovery of self-torque effect that can cause an intrinsic angular acceleration (DOI: 10.1126/science.aaw9486 [http://10.1126/science.aaw9486] ). Such a self-torque effect gives rise to a time-varying optical orbital angular momentum. Then we believe that the time-dependent OAM of this vortex laser beam can lead to non-trivial evolution of the OAM state vector. It is expected that the information on the self-torque of a twisted optical field might be reflected in an extra phase shift and, based on this, we study the possible precession and nutation evolution of a quantized optical orbital angular momentum in such a twisted light. The relevant effects such as non-cyclic non-adiabatic ‘geometric’ phase and dynamical phase due to the angula...

中文翻译：

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扭曲光中的量化光学轨道角动量进动和章动

在“光学角动量（OAM）和光学涡旋”的主题中，扭曲光（也称为“螺旋形光场”）具有螺旋波前。最近，扭曲光的新进展是Rego等人发现可引起固有角加速度的自扭矩效应（DOI：10.1126 / science.aaw9486 [http：//10.1126/science.aaw9486]）。这种自转矩效应引起时变的光学轨道角动量。然后，我们认为该旋涡激光束的时间相关OAM可以导致OAM状态向量的平凡演变。可以预期，有关扭曲光场的自扭矩的信息可能会反映在额外的相移中，因此，我们研究了在这种扭曲的光下量子光学轨道角动量的可能进动和章动演化。相关的影响，例如由于角度而产生的非循环非绝热“几何”阶段和动力阶段...