Global ETD Search
Search theses and dissertations gathered from participating repositories worldwide. Every result links back to the library that holds it. No account is needed.
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Showing 1 to 13 of 13 for “"time-dependent Schrödinger equation"”.
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Limits of long wavelength High Harmonic Generation
… been investigated. By numerically solving the time-dependent Schrödinger equation, we investigate the optimum driver pulse duration for 400 nm, 800 nm and 2 micron driver pulses for a given harmonic for hydrogen.
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Quantum dynamics in laser–assisted collisions, laser–molecule interactions, and particle–surface scattering
The time-dependent Schrödinger equation is integrated on a numerical lattice for up to three-dimensional problems. The wave packet propagation technique has been applied to ion – atom collisions in a strong laser field, the vibrational nuclear motion in small homonuclear diatomic molecular ions, …
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High harmonic generation by short laser pulses: time-frequency behavior and applications to attophysics
… HHG using short laser pulses by solving the time-dependent Schrödinger equation (TDSE). In particular, I will focus on calculating and controlling the time-dependent instantaneous frequency (chirp) of high harmonics. The harmonic chirp is a direct consequence of the atom-field interaction …
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Theoretical methods for the study of quantum dynamics
… working with only the imaginary part of the real-time position and momentum time correlation functions. Simple manipulations allow the computationally favorable limit of a single factorization (“bead”) of the Boltzmann operator to yield greatly improved results. Numerical examples for a …
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Photoionization of atoms with ultrashort XUV laser pulses at extreme intensities
… dynamics. To this end, the exact solution of the time-dependent Schrödinger equation is determined numerically for a two electron system. To surmount the limitation of the latter to systems with a small number of electrons, the time-dependent reduced density matrix formalism is implemented on the …
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Fermionic Quantum Information in Surface Acoustic Waves
… state. I wrote a numerical program to solve the time-dependent Schrödinger equation, the differential equation that describes the evolution of wave functions. The advantage of my code over other solvers is its speed. I used graphics processing units (GPUs), a technology that has only recently …
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Towards an Improved Method for the Prediction of Linear Response Properties of Small Organic Molecules
… chiroptical properties by solving the time-dependent Schrödinger equation are useful in the assignment of absolute configurations. Chiroptical properties, being very sensitive to the electronic structure of the system, require highly-accurate methods on the one hand and on the other, …
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Dissociation dynamics of diatomic molecules in intense fields
… the introduction and the background on solving time-independent and time-dependent Schrödinger equation. The numerical results in this thesis are presented in four chapters, three of which are focused on diatomic molecules in IR fields. The last one concentrates on diatomic molecules in XUV …
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Quantum Nuclear Dynamics: Application to Spin-Forbidden Transitions and Lifetime of Vibrational States
… of the spectroscopic constants and the lifetimes of the vibrational quantum states of these molecules are needed for selecting the suitable molecules for novel ultracold experiments and applications. We investigate the spectroscopic properties and the vibrational state lifetimes of the …
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Spin-Orbit Delays in Photoemission from Bi2Te3 and Bi2Se3
… in solid-state materials can be observed in real-time via attosecond time-resolved photoelectron spectroscopy [1]. In this work *Reconstruction of Attosecond Beating By Interference of Two-photon Transitions* (RABBITT) [2] is applied to Bi<sub>*2*</sub>Te<sub>*3*</sub> and …
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Coupled electron and nuclear dynamics in model systems
… nuclear and electron densities as a function of time. In the Born-Oppenheimer case, the electron density followed the vibrational motion of the nucleus. This was demonstrated in two examples. In the strongly coupled case the wave packet did not exhibit features caused by nonadiabatic coupling. …
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Coherent ionization dynamics induced by intense X-ray free-electron laser pulses
… well separated from absorption edges, a rate-equation description is generally sufficient for describing the temporal evolution of charge states. As this thesis is geared towards coherent ionization dynamics, scenarios have been selected for further analysis where the energy of incident …