Linear and nonlinear optical torque in multi-level atomic systems driven by counter-rotating orbital angular momentum fields

arXiv:2606.28766v1 Announce Type: new Abstract: We investigate the generation of optical torque in coherently prepared multi-level atomic media driven by a vector vortex beam composed of two counter-rotating components carrying opposite orbital angular momenta, $+l\hbar$ and $-l\hbar$. We consider