排序方式: 共有10条查询结果,搜索用时 15 毫秒
1
1.
2.
超球势曲线用来分析正电子氦原子体系中的共振态。利用插值方法得到交叉的势曲线,然后求解超球薛定谔方程。计算结果表明处于-0.07922 a.u.的共振是与Ps(n=2)态相联的,而处于-0.06888 a.u.的共振是与He(1s3s)态相关。 相似文献
3.
4.
Numerical exploration of population transfer of Rydberg-atom by single frequency-chirped laser pulse
下载免费PDF全文
![点击此处可从《中国物理 B》网站下载免费的PDF全文](/ch/ext_images/free.gif)
This paper has calculated that Rydberg atoms can be transferred to states of lower principal quantum number by exposing them to a frequency chirped microwave pulse. The atoms experience the consequence: 70p-69s-68p-67s-66p by a constant amplitude field in the adopted model. This study shows that the complete population transfer is related to the chirp rate and the carrier frequency. 相似文献
5.
Secure key distribution among classical parties is impossible both between two parties and in a network. In this paper, we present a quantum key distribution (QKD) protocol to distribute secure key bits among one quantum party and numerous classical parties who have no quantum capacity. We prove that our protocol is completely robust, i.e., any eavesdropping attack should be detected with nonzero probability. Our calculations show that our protocol may be secure against Eve’s symmetrically individual attack. 相似文献
6.
The population transfer of sodium in a single analytical laser pulse was studied in three models:two-level sodium,three-level sodium and many-level sodium.The effect of a third state on a two-level system was studied by investigating a ladder three-level system.Two effects were found in the vicinity of the resonance frequency. 相似文献
7.
We demonstrate theoretically that Li atoms can be transferred to states of a lower principal quantum number by exposing them to a frequency chirped microwave pulse. The population transfer of Li atoms from the n = 75 state to n = 70 with more than 90% efficiency is achieved by means of the sequential single-photon △n = -1 transitions. The calculation fully utilizes all of the available orbital angular momentum l states for a given n, and the interference pattern and population evolution dynamics of individual l states are analyzed in detail. Using the time-dependent multilevel approach, we describe the process reasonably well as a sequence of adiabatic rapid passages. 相似文献
8.
利用B样条技术,设计了一种计算高激发原子能级结构的方法,计算了高激发锂原子的能级结构,并研究了里德堡锂原子在微波场中的布居动力学过程。 相似文献
9.
Using a time-dependent multilevel approach, we demonstrate
that lithium atoms can be transferred to states of lower principle
quantum number by exposing them to a frequency chirped microwave
pulse. The population transfer from n = 79 to n = 70 states of
lithium atoms with more than 80% efficiency is achieved by means
of the sequential two-photon Δ n = - 1 transitions. It is
shown that the coherent control of the population transfer can be
accomplished by the optimization of the chirping parameters and
microwave field strength. The calculation results agree well with
the experimental ones and novel explanations have been given to
understand the experimental results. 相似文献
10.
With nonlinear Mach-Zehnder interferometer (NLMZI) and a typed beta-barium borate (BBO) crystal, we optically generate single-mode excited entangled coherent states. This scheme can be easily generalized to generate two-mode excited entangled coherent states. We simply analyse different influences of single- and two-mode photon excitations on entangled coherent states. 相似文献
1