Xiaoguang Yu

Spin effects on the EM wave modes in magnetized plasmas

The spin effects on the electromagnetic (EM) wave propagating in arbitrary direction in magnetized plasma are considered. The dispersion relations for EM propagating parallel and perpendicular to the external magnetic field are obtained. It is shown that the spin effects have significant influence on the low frequency modes. New wave modes appear both in left-hand polarized waves propagating parallel to the external magnetic field and in the traditional ordinary waves propagating perpendicular to the external magnetic field. Particularly, the new modes of the latter may exist even in moderate-density magnetized plasmas.

Vacuum polarization and magnetization effects in ultra-intense laser pulse-pair plasmas

The nonlinear effects associated with the vacuum polarization and magnetization in the propagation of ultra-intense linearly polarized laser pulse in electron-positron plasmas are investigated. Using the slowly varying envelope approximation, a modified nonlinear Schrodinger equation describing the evolution of the pulse envelope is derived based on the Maxwell equations which include the vacuum polarization and magnetization effects. The analytical and numerical analysis show that the number density of electron-positron plasmas can enhance the vacuum polarization and magnetization effects, and due to the vacuum polarization and magnetization nonlinearity, a one-dimensional laser pulse envelope soliton can be formed. The evolution of an initially Gaussian laser pulse is also discussed by numerical analysis.

Analytical results for a parity-time-symmetric two-level system under synchronous combined modulations

Xiaobing Luo , Baiyuan Yang , Xiaofei Zhang , Lei Li , and Xiaoguang Yu 1,2 1 Department of Physics, Jinggangshan University, Ji’an 343009, China 2 Institute of Atomic, Molecular Physics & Functional Materials, Jinggangshan University, Ji’an 343009, China and 3 Key Laboratory of Time and Frequency Primary Standards, National Time Service Center, Chinese Academy of Sciences, Xi’an 710600, People’s Republic of China (Dated: March 29, 2017)

Exact control of parity-time symmetry in periodically modulated nonlinear optical couplers

We propose a mechanism for the realization of exact control of parity-time

Directed tunneling of a prescribed number of dipolar bosons in shaken triple-well potentials

(\mathcal{PT})

Pseudo-parity–time symmetry in periodically high-frequency driven systems: perturbative analysis

symmetry by using a periodically modulated nonlinear optical coupler with balanced gain and loss. It is shown that for certain appropriately chosen values of the modulation parameters, we can construct a family of exact analytical solutions for the two-mode equations describing the dynamics of such nonlinear couplers. These exact solutions give explicit examples that allow us to precisely manipulate the system from nonlinearity-induced symmetry breaking to

One-dimensional EM solitons in ultrashort intense laser pulse-partially stripped plasmas

\mathcal{PT}

Modulational instability of ultra-intense linearly polarized laser pulse in electron–positron plasmas

symmetry, thus providing an analytical approach to all-optical signal control in nonlinear

Emission enhancement of Sr 3 YP 3 O 12 :R (R = Dy 3+ and Eu 3+ ) phosphors for light-emitting diodes by adding H 3 BO 3 flux

\mathcal{PT}

Enhanced luminescence properties of MgTO 3 :Mn 4+ red-emitting phosphor by adding Ge 4+ ion and H 3 BO 3

-symmetric structures.