圆极化光子的磁矩耦合

行波圆极化电磁波场中费米子g因子的替代测量

Alternative measurements of the fermion g-factor in the field of a traveling circularly polarized electromagnetic wave

传播的圆极化电磁波和恒定磁场的场使费米子在波长量级的截面中垂直于波的传播而定域。狄拉克方程的不寻常的精确解对应于这种局部化。除了常规使用的薄费米子束，它可以适用于替代测量的g因子。本文考虑了应用于测量的解决方案的细节和特点。

线、圆偏振光与冷原子相互作用系统的非高斯双模压缩和连续变量纠缠

Non-Gaussian two-mode squeezing and continuous variable entanglement of linearly and circularly polarized light beams interacting with cold atoms

我们研究了如何通过两个线偏振或圆偏振的场模与放置在光学腔中的类X四能级原子系综之间的非共振相互作用产生纠缠相干态和非高斯性质的低强度相干态的叠加态。我们比较我们的结果，最近的实验观察，并认为，非高斯结构的场状态可能存在于这些系统。

Polarization-dependent property of dipole-dipole interaction mediated by localized surface plasmon of an Ag nanosphere

The effect of the dipole polarization on the quantum dipole dipole interaction near an Ag nanosphere (ANS) is investigated. A theoretical formalism in terms of classical Green function is developed for the transfer rate and the potential energy of the dipole dipole interaction (DDI) between two polarized dipoles. It is found that a linear transition dipole can couple to a left circularly polarized transition dipole much stronger than to a right circularly polarized transition dipole. This polarization selectivity exists over a wide frequency range and is robust against the variation of the dip…

Quadrupole absorption rate for atoms in circularly-polarized optical vortices

Twisted light beams, or optical vortices, have been used to drive the circular motion of microscopic particles in optical tweezers and have been shown to generate vortices in quantum gases. Recent studies have established that electric quadrupole interactions can mediate an orbital angular momentum exchange between twisted light and the electronic degrees of freedom of atoms. Here we consider a quadrupole atomic transition mediated by a circularly-polarized optical vortex. We evaluate the transfer rate of the optical angular momentum to a $Ca^+$ ion involving the $4^2S_{1/2}\rightarrow 3^2D_{5…

Floquet theory of spin dynamics under circularly polarized light pulses

Within the Floquet theory of periodically driven quantum systems, the nonlinear single-spin dynamics under pulse of a circularly polarized electromagnetic field is analyzed. It is demonstrated that the field, first, lifts the spin degeneracy and, second, the field-induced spin splitting is accompanied by the photon emission at the spitting frequency. This two-stage process leads, particularly, to the polarization of spins along angular momentum of the circularly polarized field. As a result, the pulse-induced magnetization appears, what can be observed in state-of the-art measurements.

圆偏振单光子自旋电子源

A spintronic source of circularly polarized single photons

我们提出了一种发射圆偏振光的自旋电子单光子源，其中螺旋度由施加的磁场决定。光子从电操作自旋发光二极管内的InGaAs量子点发射，所述电操作自旋发光二极管包括稀磁半导体ZnMnSe。发射光的圆偏振度高，在外加磁场为2T时达到83%，在外加磁场为6T时达到96%。在脉冲工作模式下记录的自相关迹线证明了发射光是反聚束的。这两个圆偏振态可以用来表示量子态|0>和|1>量子密码学实现。