排序方式: 共有22条查询结果,搜索用时 296 毫秒
1.
本文在Coulomb-Volkov近似下,研究了激光场中电子对核的相对论散射.电子出射与入射态分别用Volkov波函数和Coulomb-Volkov波函数来描述.数值计算给出了辐射场修正的散射截面及其对激光强度和频率的依赖关系,并与相应的Born近似结果进行了比较. 相似文献
2.
本文在一级Bom近似下,研究了激光场中正电子对基态氢原子的碰撞电离反应,并与入射粒子为电子的(e,2e)反应进行了对比.激光场中正电子态和敲出电子态分别采用Volkov波函数和Coulomb-Volkov波函数,靶原子的缀饰波函数由含时微扰论给出.计算结果显示激光缀饰的三重电离截面明显依赖于入射粒子电荷符号.激光越强,二者差距越大. 相似文献
3.
4.
应用迈克耳孙干涉仪研究压电陶瓷的特性 总被引:1,自引:1,他引:0
简述了应用迈克耳孙干涉仪测量压电陶瓷压电常量的原理及实验结果分析.简单介绍了研究压电陶瓷振动特性的方法. 相似文献
5.
本文在一级Born近似下,研究了激光场中正电子对基态氢原子的碰撞电离反应,并与入射粒子为电子的(e,2e)反应进行了对比.激光场中正电子态和敲出电子态分别采用Volkov波函数和Coulomb-Volkov波函数,靶原子的缀饰波函数由含时微扰论给出.计算结果显示激光缀饰的三重电离截面明显依赖于入射粒子电荷符号.激光越强,二者差距越大. 相似文献
6.
By comparing Cabello's addendum to his quantum key distribution protocol [Phys. Rev. A 64 (2001) 024301], we propose a more convenient modified protocol based on the entanglement swapping which is secure against the eavesdropping strategy addressed by Zhang et al. [Phys. Rev. A 63 (2001)036301] and other existing types of attack. 相似文献
7.
8.
Positron-Impact Ionization of Atomic Hydrogen in a Bichromatic Laser Field in the Second Born Approximation 下载免费PDF全文
The positron impact-ionization of atomic hydrogen in the presence of a linearly polarized bichromatic field is investigated in the second Born approximation. The field is composed of a fundamental frequency and its second harmonic. The state of positron in the field is described by the Volkov wavefunction, and the continuum state of the ejected electron is described by the Coulomb—Volkov wavefunction. The dressed ground state of target is a first order time-dependent perturbative wavefunction. The triple differential cross sections and their dependencies on laser field parameters are discussed. Numerical results demonstrate that the second-order effect plays a crucial role in understanding the laser-assisted positron scattering process. 相似文献
9.
We use the iterative unitary matrix multiplication method to calculate the long-time behaviour of the resonant quantum kicked rotator with a large denominator. The delocalization time is an exponential function of the denominator. The wave function delocalizes through degenerate states. We also construct a nonresonant quantum kicked rotator with delocalization. 相似文献
10.
Positron-impact ionisation of atomic hydrogen in the presence of a bichromatic laser field 下载免费PDF全文
The positron impact-ionisation of atomic hydrogen in the presence of a linearly polarised bichromatic field is investigated in the first Born approximation.The field is composed of a fundamental frequency and its second harmonic.The state of positron in the field is described by the Volkov wavefunction,and the continuum state of the ejected electron is described by the Coulomb-Volkov wavefunction.The dressed ground state of target is a first order time-dependent perturbative wavefunction.The triple differential cross sections and their dependencies on laser field parameters are discussed and compared with the results modified by a monochromatic field.Numerical results show that the coherent phase control is significant and the laser-assisted ionisation cross sections caused by positron and electron are different. 相似文献