perturbation theoryquantum mechanicsschroedinger equationtimetransientsIt is shown that the introduction of the time-dependent perturbation sharply at an instant, is redundant to obtain the usual expression for the transition rates between states, provided the initial state is an incoherent mixture of the...
Using the operator representation of indels and the technique of time-dependent perturbation theory, we express the ab initio probability as a summation over all alignment-consistent indel histories. Exploiting the equivalence relations between different indel histories, we find a “sufficient and nearly...
Time-Dependent Density Functional Perturbation Theory 来自 unam.bilkent.edu.tr 喜欢 0 阅读量: 20 作者: D Philosophiæ 摘要: Since its first appearance in the mid 60s, Density Functional Theory (DFT)[1, 2] has demonstrated a strong predictive power in the study of ground-state ...
where the coefficients, γr, are strongly dependent upon the frequency of the excitation relative to the natural frequencies of the system (as well as the forcing levels) and may themselves be complex. In particular, it is found that when the frequency of excitation, ωq approaches one of th...
It has been known for some time that the exchange-correlation potential in time- dependent density-functional theory is an intrinsically nonlocal functional of the density as soon as one goes beyond the adiabatic approximation. In this paper we show that a much more severe nonlocality problem, wi...
时间带宽积 time-bandwidth product 不含时微扰 time-independent perturbation 时谐光波 time-harmonic light wave 含时薛定谔方程 time-dependent Schro&4&dinger equa- tion time-dependent perturbation 分时激光器 time-sharing laser 飞行时间法 time-of-flight method 时谐波 time-harmonic 电力 时间行程特性 time...
Parity-time (PT) symmetry has been unveiling new photonic regimes in non-Hermitian systems, with opportunities for lasing, sensing and enhanced light-matter interactions. The most exotic responses emerge at the exceptional point (EP) and in the broken PT
The master model (1) and the slave model (53) are state-dependent switching systems, hence, we can divide the error system into the following four cases at time t.Case 1 If \(|x_{i}(t)|>T_{i}\), \(|y_{i}(t)|\ge T_{i,}\)...
5) is a combination of thermal and quantum relaxation: the size of ΔT is strongly dependent on the order in the perturbation theory necessary to connect the states contributing to |± φ〉. In general, Sx, yn are combinations of S+, −n, connecting | S, mz〉 with | S, mz ± n...
opposite polarity of the pulses, the current flows along thexdirection, with double magnitude relative to the current produced by a single pulse of amplitude\(\frac{{V_{\mathrm{P}}}{2}\), and sign determined by the polarity of the pulses. The current generates time-dependent transverse Hal...