Sum Squeezing, Difference Squeezing, Higher-Order Antibunching and Entanglement of Two-Mode Photon-Added Displaced Squeezed States

In this paper, we study some higher-order nonclassical properties and intermodal entanglement that may arise in the so called two-mode photon-added displaced squeezed state. We derive analytical expressions for the degree of sum squeezing and difference squeezing, which are interesting kinds of two-mode squeezing, as well as for the degree of antibunching to any orders. We also examine the degree of entanglement between the two modes using the existing Hillery-Zubairy criterion. Based on the derived expressions we analyze in detail the behavior of these nonclassical effects and entanglement depending on the parameters involved.     

q变形非简谐振子奇偶广义相干态的高阶压缩效应及反聚束效应

研究了q变形非简谐振子奇偶广义相干态的高阶压缩效应和反聚束效应,并就q变量[χ]的两种不同表示情况进行了讨论.数值计算结果表明,q变形非简谐振子奇偶广义相干态均可呈现奇次方阶压缩效应和反聚束效应,这与谐振子情况的光学统计特性是不同的.     

形变相干光场与级联型三能级原子相互作用中场的反聚束效应

建立了q形变光场与级联型三能级原子相互作用的非线性理论, 求得相互作用绘景中薛定谔方程的形式解及在其态下的期望值, 利用数值计算揭示了q形变对场与三能级原子相互作用中场反聚束效应的影响. 研究发现q偏离1的程度越大, q形变对场反聚束效应的调控能力越强, 反映出q形变的非线性行为对量子相干性的干扰以及对量子特性的影响. 当q→1时, 恢复为普通线性理论.     

Determination of the Quality Parameters of Higher-Order Bessel Light Beams

Journal of Applied Spectroscopy - A method is proposed for evaluating the quality of higher-order Bessel light beams (BLBn, order n > 0) by analyzing digital computer images of...     

Antibunching in multiphoton processes

A Stokes-antiStokes-system of four Boson modes with hyper-scattering or similar four photon interaction is investigated with respect to the statistical behaviour of the common ground mode. The solution of Heisenberg equations in short time approximation opens the possibility of antibunching already with the terms linear in t. It is shown in how far antibunching can be remarked even at intensities which are not extremely small. Its characteristic time may be shifted over several orders of magnitude.     

Bunching and Antibunching in Cavity QED

We study the statistics of the emitted filed from Rydberg atom confined inside a microcavity and interacting with a pump laser in the strong coupling regime. We explore the manifestation of the antibunching in connection with the internal system parameters.     

Interaction Solutions for (1+1)-Dimensional Higher-Order Broer-Kaup System

The (1+1)-dimensional higher-order Broer-Kaup (HBK) system is studied by consistent tanh expansion (CTE) method in this paper. It is proved that the HBK system is CTE solvable, and some exact interaction solutions among different nonlinear excitations such as solitons, rational waves, periodic waves, corresponding images are explicitly given.     

Higher-Order Lagrangian Equations of Higher-Order Motive Mechanical System

In this paper, if the condition of variation δt=0 is satisfied, the higher-order Lagrangian equations and higher-order Hamilton's equations, which show the consistency with the results of traditional analytical mechanics, are obtained from the higher-order Lagrangian equations and higher-order Hamilton's equations. The results can enrich the theory of analytical mechanics.     

k玻色子q相干态的反聚束效应

研究了q变形湮没算符高次幂(akq,k≥3)本征态的反聚束效应,并就k=3的情况用数值计算方法研究了q变形参数对该效应的影响.结果表明,当q变形相干态中谐振子的强度x=|z|2在某些区间内取值时,akq的本征态将呈现反聚束效应,并且这一效应明显地受到q参数的影响.当参数q取定时,随着q变形光场强度的变大,该光场的光子数涨落在经典(或量子)和量子(或经典)特性之间交替地变化.     

Interaction of the Light Field with N Atoms Possessing Dipole-dipole Interaction

The interaction of the light field with two-level atoms possessing dipole-dipole interaction is studied. It is shown that a light field at coherent state can produce a squeezed atom laser.     

Interaction of the Light Field with N Atoms Possessing Dipole-dipole Interaction

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Squeezing of Phonons in Photon-Phonon Interaction via Anti-Stokes Light

A model of the photon-phonon interaction via anti-Stokes light has been proposed to investigate the squeezing properties of phonon mode. The behavior of initial anti-Stokes light with complex statistics has been studied. It is shown that the squeezing of phonon mode can appear under certain conditions.     

双原子系统共振荧光的反聚束效应

本文利用多原子系统的再耦合波函数,求出双原子系统的二阶相关函数.通过数值计算,讨论了原子间的受激辐射,原子的纵横弛豫对间I_1、I_2和频率失谐等因素对共振荧光反聚束效应的影响.在T_1>>T_2时,反聚束效应会减小.     

Interaction of Twisted Light with Electrons in Two-Dimensional Quantum Rings

We investigate the dynamics of charge carriers propagating in a ring being induced by twisted light: The exciting laser beam is assumed to have nonzero orbital angular momentum. The selection rules for the transitions between the eigenstates of the two-dimensional ring are determined with the aid of analytic and numerical methods. Using these results, we gain an insight into the physical process that leads to the transfer of the angular momentum of the laser beam to the electrons in the quantum ring.     

Antibunching and sub-poissonian photon statistics in the Jaynes-Cummings model

Sub-poissonian photon statistics and antibunching by the definition based on the positive derivative of g⁽²⁾ (t, t+τ) as a function of the delay time τ at τ=0 are treated in a single-mode single-two-level-atom model. It is shown, in particular, that sub-poissonian behaviour may be accompanied by bunching or antibunching and photon-antibunching may be accompanied by sub-poissonian or super-poissonian field statistics. It is also shown that the photon-antibunching persists with increasing mean photon number of an initial chaotic state while the sub-Poisson behaviour disappears.     

不同激光脉冲对J-C模型中的反聚束效应的影响

选取三种不同的激光脉冲形式,研究了依赖于时间的J-C模型中的反聚束效应.并对三种不同脉冲形式下所得的结果进行比较.     

激发k玻色子q相干态的反聚束效应

构造了激发k玻色子q相干态a+mqz,k,j〉q(k≥3),并用数值计算的方法研究了参数m对反聚束效应的影响.结果表明:反聚束效应明显受到m的调节.对于大x(x=z2),激发(即增加光子)改变了反聚束效应出现的区间.对于小x,当j=0时,激发使原来强烈的聚束效应变为强烈的反聚束效应;当j≠0时,激发后基本上保持着原来强烈的反聚束效应     

领头项q-相干态的反聚束效应和压缩效应

在推广的对易关系aa+-qa+a=1下,把领头相干态的概念应用到了q-相干态中,讨论了反聚束效应和压缩效应,并作了数值分析.