量子跃迁

The relationship of optical gain with well width, lnAs composition and the carrier concentration is obtained by considering the energy band of the strain material, transition matrix, band gap shrinkage due to carrier concentration, and carrier intraband relaxation.

考虑了应变体材料的能带结构、光跃迁矩阵元、载流子浓度引起的禁带变窄以及载流子带内驰豫效应后，模拟得到了GaAs／InGaAs／GaAs应变量子阱光增益与阱宽，InAs给份及注入载流子浓度的关系。

The dark lines are consequences of destructive interference of the transitions and singularities of the radiation field's DOS.

暗线是由于辐射场态密度的奇点及跃迁时量子相消的结果。

The excitonic properties about recombination,transfer andscattering in semiconductors and superlattices are an importantresearch topic because of the optical properties of superlatticesand multiple quantum well in band edge depended on the excitonicfeature.

在半导体超晶格中，激子的行为决定了超晶格和量子阱的很多光学性质。因此有关激子的复合、跃迁及散射过程是一项重要的研究课题。

If the final wavefunction of photoionization is normalized on the energy scale, Golden rule would be simpler.

Fermi黄金定择是量子理论中最重要的结论之一、是原子微观跃迁过程研究的理论基础。

It is found that the transition energy of acceptors increases with the enhancement of quantum confinement.

研究发现，随着量子限制效应的增强，受主跃迁能量会增加。

When electron spins were unpolarized, the dependence of the low-lying energy of the barrier Li QD on an external magnetic field B and the distance d was obtained.

研究表明，当电子自旋为非极化时，束缚锂量子点的低态能谱受磁场B和距离d的影响，其最低态角动量L随B和d的变化而跃迁，并从动力学方面进行了分析。

With proper atomic coherence, the performance has the following advantages compared with that of the velocity selection of the ultracold two-level atoms by the micromaser: high resonant transmitted efficiency, low unresonant transmitted efficiency, and large velocity selection scale. The second part includes the fifth chapter.

原子透射几率只受到一种量子干涉效应的影响，其来源为V型的两个跃迁通道，因此Micromaser对入射超冷V型三能级原子束速度的选择性能深深地受到原子相干性的影响，我们发现选取适当的原子相干参数以及其它参数，速度选择性能可以达到很理想的状态：共振原子透射效率高、透射原子束的速度纯度好、速度选择范围大。

Quantum chromodaynamics predicts that at high temperature and high density a deconfined phase from hadronic matter to quark-gluon plasma will occur.

量子色动力学预言在高温高密条件下，有可能发生从强子物质到退紧闭的夸克-胶子等离子体的相变跃迁。

Transition Energy of Polaron in Semiconductor Quantum Dot.

半导体量子点中极化子的跃迁能量。

Under an appropriate condition, the squeezed vacuum field can trap the two atoms inri.An analytical expression of emission spectrum for three-level atom interacted with two-mode cavity field is given. The effects of the initial state of system on the emission spectrum for three-level atom are explored.

我们给出了好腔中与双模腔场相互作用的三能级原子发射谱的一般表达式，探讨了系统初态对三能级原子发射谱的影响，阐明了只有原子和双模驱动场初始时刻均处于相干叠加态，原子不同跃迁通道间的量子干涉才使得原子发射谱呈现相位敏感性。

Since historical times,England ,where the early inhabitants were Celts, has been conquered three times .

从有历史以来，英国，在此地早期居住的是凯尔特人，已经被征服了三次。

Bluetooth OBEX File Transfer Enables the sending and receiving of files on your phone via Bluetooth.

蓝牙OBEX文件移动允许经过蓝牙传送和接受文件。。。。