Recent years,much attention has been paid on Terahertz and a fast development on terahertz science and technology has been achieved. However,there is much difficulty to fabricate terahertz devices with classical electromagnetic mi

The trial equation method is improved by means of the general function transformation instead of the traveling wave transformation. Some new explicit solutions for a class of generalized nonlinear sine-Gordon equation are presente

The Gouy phase shift in the focal field of high-N A focused radially polarized beam was investigated in detail. Analytical expression for the Gouy phase shift can be derived using tilted wave interpretation,which provides a reason

It is well known that the scalar approximation is no longer valid for the beams with small spot size comparable with the wavelength. Detailed numerical calculations for the series expansion solution,non-paraxial approximation solu

The Λ-type three-level system coupled by two coherent fields is a basic model to study the electromagnetically induced transparency(EIT). Based on that,the cascade quasi-Λ-four-level configuration is formed when a radio-frequency(

We investigate the energy levels of two qubits that are coupled via ■1z ■ ■2z Ising-type of coupling. We demonstrate that two flux qubits can be coupled to form a quantum mechanical four level system. We not only investigate how t

The quantization scheme of the mesoscopic mutual inductance circuit with superconducting Josephson junctions is given. By means of squeezing unitary transformation,the energy level and the ground state vector of the system are obt

To improve search ability and optimization efficiency and to avoid premature convergence for particle swarms optimization,a novel quantum particle swarm optimization for continuous space optimization is proposed. The positions of

Four polarization states are used for key distribution in the BB84 protocol,but the polarization states will be rotated for magneto-optic effect during the transmission. Polarization variation will effect distribution of the key,s

A scheme is proposed for the realization of quantum SWAP gate in cavity QED. Weconsider two three-level atoms simultaneously interact with single-mode cavity in the case of large detuning. Moreover,two classical fields are used to

The dipole-dipole interaction of the two atoms is discussed. By considering the interaction between the two-mode squeezing vacuum state field and the environment(atoms),weinvestigate the quantum information fidelities of the atoms

The statistic properties of photon in the system of a two-mode odd-even entangled coherent states field interacting with a V-type three-level atom in Kerr medium are investigated by solving Schr?dinger equation and numerical calcu

The exact solution of time evolution operator is obtained by applying the gauge transform of algebra dynamic. Such an operator describes the quantum state of time dependence of mesoscopic LC circuit containing voltage source. The

We use the method of nonlinear feedback control which added a sine terms with parameter to control the chen system effectively. Along with the augmentation of k,a series of variation takes play in the system's dynamical characteri

Higher order nonlinear susceptibilities of the cyanine dye PC films on the silica substrates deposited by spin-coating technique,are investigated by means of the laser-induced transient grating(TG)technique. The third-order nonlin

A new method of analyzing three waves interaction in nonlinear periodically poled crystals(PP-crystals)on the theorem of quasi-phase-matching,called the vector superposing method is presented. By using of the characteristic curve

The probe beam can be indued focusing by the pump beam that results from crossphase modnlation mechansim(XPM). Found by Agrawal in 1990,it was stduied by many people. We discuss the evolution of Gaussian beam with the angle of inc

An experiment was designed to study 532 nm CW laser radiation on Si-doped n-type GaAs materials. The crystal axis of GaAs is 〈100〉 leaning to 〈111A〉 15°. As the laser irradiated on the materials,a diffraction-like phenomenon was o

The experiments for 2D triangulation ranging accuracy show that,under large visual angle condition,the 2D triangulation ranging error is obviously increased. Applying the pinhole imaging instead of normal lens imaging,the large vi

The typical method of testing blood glucose needs samples from vein of diabetics,which not only spend much money but also bring much pain to diabetics. Fluorescence spectrometry was applied to measure ment of human blood glucose w

Theory of chaos transmission in dispersion optical fiber and physical mechanism of chaotic signal action on dispersion optical fiber are studied. A physical model of evolution of chaotic signal propagation in dispersion optical fi

Based on MNLS,by using the method of variational principle,the influence of fifth-order nonlinearity on the propagation of soliton-like pulses in fiber is investigated,the evolution equations for the parameters are deduced,the rel

The analysis of optical mode field in the coupler was carried out,is in the condition of weakly guiding,weakly coupling,an approximate shape of fused tapered coupler and the appropriate continuous functions,description. Triangle f