Dynamic Polarization of the LiH Molecule in Strong Light Field in Anomalous-Dispersion Domain

Non-trivial retardation effects in dispersion forces: From anomalous distance dependence to novel traps

In the study of dispersion forces, nonretarded, retarded and thermal asymptotes with their distinct scaling laws are regarded as cornerstone results governing interactions at different separations. Here, we show that when particles interact in a medium, the influence of retardation is qualitatively different, making it necessary to consider the non-monotonous potential in full. We discuss different regimes for several cases and find an anomalous behaviour of the retarded asymptote. It can change sign, and lead to a trapping potential.

Sidebands suppression of 852 nm Cesium Faraday anomalous dispersion optical filter by argon gas

In this work, sidebands suppression brought by buffer gas argon (Ar) in cesium Faraday anomalous dispersion optical filter (FADOF) at 852 nm is investigated. FADOF performances at different Ar pressures (0 torr, 1 torr, 5 torr and 10 torr) are compared, and a single-peak transmittance spectrum with peak transmittance up to 80% is achieved at the high Ar pressure. A detailed analysis shows that, this sidebands suppression comes from the depopulation enhancement by the buffer gas. This result can be generalized to other FADOFs with similar level structures such as the D2 lines of other alkali me…

偶极超固体中剪切波的反常色散

Anomalous dispersion of shear waves in dipolar supersolids

本研究考察三角形与蜂窝状偶极超固体中的横波传播，发现蜂窝相存在快于横向声速的反常色散，并计算两相剪切模量以表征其固体刚性。

Anomalous dispersion in pulsar 21-cm radiation reveals the existence of faster-than-c phenomena in near field of scatterers

At passage of 21-cm pulsar radiation through clouds of neutral hydrogen atoms the signal in the region of anomalous dispersion is appearing as faster-than-c. As unlike laboratory researches separate scatterers are located on big distances from each other, this effect can be attributed only to the consecutive independent scattering on isolated atoms. For its explanation we must accept that photons are emitted and absorbed on the distances \lamda/2, in a near field, instantaneously. Such peculiarity of near field has been established earlier within the frame of QED and explains, quantitatively a…

磁诱导透明-吸收及正常-异常色散特性研究：${}^{87}\text{Rb}$介质或任何J型配置原子蒸气在矢量磁场和弱共振泵作用下的表现

Magnetically Induced Transparency-Absorption and Normal-Anomalous Dispersion Characteristics of ${}^{87}\text{Rb}$ Medium or Any J-Type Configuration Atomic Vapors Subject to a Vector Magnetic Field and a Weak Resonant Pump

本研究通过分析${}^{87}\text{Rb}$介质或J型原子蒸气在矢量磁场和弱共振泵作用下的MITA/MINAD特性，揭示了频率依赖的透明吸收与正常异常色散现象，为高精度磁力计和光子功能优化提供理论支持。

低能自由电子与光相互作用的超快斯特恩-盖拉赫和反常布拉格衍射机制

Ultrafast Stern-Gerlach and Anomalous Bragg Diffraction Regimes of Low-energy Free Electron Interaction with Light

针对自由电子量子光学中相干控制自由电子的目标，提出低能量子电子波包的超快斯特恩-盖拉赫机制并纳入二阶色散效应，发现色散诱导的反常布拉格衍射机制，为相关衍射机制分类及电子波函数量子工程提供基础。

Fast-Light in a Photorefractive Crystal for Gravitational Wave Detection

We demonstrate superluminal light propagation using two frequency multiplexed pump beams to produce a gain doublet in a photorefractive crystal of Ce:BaTiO3. The two gain lines are obtained by two-wave mixing between a probe field and two individual pump fields. The angular frequencies of the pumps are symmetrically tuned from the frequency of the probe. The frequency difference between the pumps corresponds to the separation of the two gain lines; as it increases, the crystal gradually converts from normal dispersion without detuning to an anomalously dispersive medium. The time advance is me…

非理想腔中的耗散光-物质耦合与反常色散

Dissipative light-matter coupling and anomalous dispersion in nonideal cavities

本研究通过输入-输出方法揭示非理想腔中发射体与腔体因共同光子环境产生有效耗散耦合，导致能级吸引，解释反常色散与负质量，并产生奇异点和连续体束缚态。

Anomalous non-additive dispersion interactions in systems of three one-dimensional wires

The non-additive dispersion contribution to the binding energy of three one-dimensional (1D) wires is investigated using wires modelled by (i) chains of hydrogen atoms and (ii) homogeneous electron gases. We demonstrate that the non-additive dispersion contribution to the binding energy is significantly enhanced compared with that expected from Axilrod-Teller-Muto-type triple-dipole summations and follows a different power-law decay with separation. The triwire non-additive dispersion for 1D electron gases scales according to the power law $d^{-β}$, where $d$ is the wire separation, with expon…

Anomalous Bloch oscillation and electrical switching of edge magnetization in bilayer graphene nanoribbon

Graphene features topological edge bands that connect the pair of Dirac points through either sectors of the 1D Brillouin zone depending on edge configurations (zigzag or bearded). Because of their flat dispersion, spontaneous edge magnetisation can arise from Coulomb interaction in graphene nanoribbons, which has caught remarkable interest. We find an anomalous Bloch oscillation in such edge bands, in which the flat dispersion freezes electron motion along the field direction, while the topological connection of the bands through the bulk leads to electron oscillation in the transverse direct…

Integrable Fractional Modified Korteweg-de Vries, Sine-Gordon, and Sinh-Gordon Equations

The inverse scattering transform allows explicit construction of solutions to many physically significant nonlinear wave equations. Notably, this method can be extended to fractional nonlinear evolution equations characterized by anomalous dispersion using completeness of suitable eigenfunctions of the associated linear scattering problem. In anomalous diffusion, the mean squared displacement is proportional to $t^α$, $α>0$, while in anomalous dispersion, the speed of localized waves is proportional to $A^α$, where $A$ is the amplitude of the wave. Fractional extensions of the modified Kortewe…

光子自旋霍尔效应的增益辅助调控

Gain-assisted control of the photonic spin Hall effect

本文提出增益辅助模型，通过双光子拉曼跃迁调控反射光的光子自旋霍尔效应，实现自旋累积方向切换及峰值和角度范围的可控调节，为光学传感等自旋应用提供新途径。