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1

CARONE, FABIANI FILIPPO. "Adsorbption and scattering phenomena in materials science." Doctoral thesis, Università degli Studi di Milano-Bicocca, 2014. http://hdl.handle.net/10281/50846.

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The present work is divided in two part. The first is dedicated to the investigation of the gas-metal interactions, an interesting area in the basic surface science but also in applied one, since it could provide a more efficient way to design corrosion-resistant structural metals. In particular, we concentrate our attention on the study H2S on Fe surface. Experimental studies, of adsorption of H2S on Fe, and first-principle calculations were carried out for these systems, clarifying some important questions, such as adsorption geometry and dissociation pathways for H2S, on the above c
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2

Sundaram, Ganesh. "Wave-packet dynamics in slowly perturbed crystals : gradient corrections and Berry-phase effects /." Digital version accessible at:, 2000. http://wwwlib.umi.com/cr/utexas/main.

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3

Hirisave, Shivaram Niranjan. "Attosecond Resolved Electron Wave Packet Dynamics in Helium." Diss., The University of Arizona, 2013. http://hdl.handle.net/10150/293618.

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Electron dynamics in atoms and molecules occurs on a time-scale of attoseconds (10⁻¹⁸s). With the availability of strong field (∼ 10¹²- 10¹³ W cm⁻²) femtosecond (10⁻¹⁵s) laser pulses with electric fields that can reach and exceed the Coulomb field strength experienced by an electron in the ground state of an atom, it is now possible to generate even shorter pulses with durations on the order of attoseconds by the process of high-harmonic generation (HHG). In this dissertation, experiments to study electron dynamics on attosecond time-scales in a helium atom using attosecond pulses generated by
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4

Kuijpers, Stephan Robert. "Phonon wave-packet dynamics at modelled grain boundaries." Kyoto University, 2018. http://hdl.handle.net/2433/235089.

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5

Han, Alex Chao. "Coherence and control in photo-molecular wave packet dynamics." Thesis, University of British Columbia, 2015. http://hdl.handle.net/2429/53991.

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Wave-mechanical phenomena such as resonance and interference, in both light and matter, are central to the principles of quantum coherent control over molecular processes. Focusing on the dynamical aspects, this dissertation is a compilation of studies on the interaction physics involving wave packets in molecules, the driving light field, and the underlying coherence and control. In each work, we will demonstrate interesting correlations between the properties of a carefully designed excitation light field and desirable outcomes of the molecules quantum dynamics. We will analyze the dynamical
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6

Cao, Qian. "Propagation Dynamics of Spatio-Temporal Wave Packets." University of Dayton / OhioLINK, 2014. http://rave.ohiolink.edu/etdc/view?acc_num=dayton1405693684.

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7

Loreau, Jérôme. "Non-adiabatic wave packet dynamics of the charge transfer and photodissociation processes involving HeH+." Doctoral thesis, Universite Libre de Bruxelles, 2010. http://hdl.handle.net/2013/ULB-DIPOT:oai:dipot.ulb.ac.be:2013/210050.

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In this thesis, we present a theoretical investigation of reactive processes involving the HeH$^+$ molecular ion, with applications in laboratory and astrophysical plasma physics. We consider in particular two processes, which are the charge transfer in H + He$^+$ collisions at low energy from a molecular approach and the photodissociation of HeH$^+$.<p><p>At the molecular level, the cross section is the basic quantity that has to be determined in order to achieve an understanding of reactive processes. Its calculation will be based on the description of the reactions using an emph{ab initio},
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8

Andrianov, Ivan V. "Simulations of ultrafast photoinduced wave packet dynamics in three dimensions." [S.l. : s.n.], 1999. http://www.diss.fu-berlin.de/2000/17/index.html.

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9

Fabčič, Tomaž. "Wave packet dynamics in atomic systems and Bose-Einstein condensates." [S.l. : s.n.], 2008. http://nbn-resolving.de/urn:nbn:de:bsz:93-opus-35951.

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10

Meinhold, Dirk. "Spatial Dynamics of Wave Packets in Semiconductor Heterostructures." Doctoral thesis, Saechsische Landesbibliothek- Staats- und Universitaetsbibliothek Dresden, 2005. http://nbn-resolving.de/urn:nbn:de:swb:14-1120744780310-59904.

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This thesis presents the first study of the damping of a Bloch oscillating wave packet by Zener tunneling to above-barrier states [1]. We investigate the time evolution of an below-barrier subband Wannier-Stark wave packet in a strongly coupled GaAs/AlGaAs superlattice (SL) with shallow quantum well barriers by optical interband spectroscopy. We use a sub-100 fs homodyne pump-probe technique which is sensitive to the intraband polarization. The presented experimental data unambiguously show an electric field-dependent continuous decrease of the intraband coherence time. Besides the continuous
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11

Goussev, Arseni. "Dynamics of wave packets in the quantum Lorentz gas." College Park, Md. : University of Maryland, 2005. http://hdl.handle.net/1903/2695.

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Thesis (Ph. D.) -- University of Maryland, College Park, 2005.<br>Thesis research directed by: Physics. Title from t.p. of PDF. Includes bibliographical references. Published by UMI Dissertation Services, Ann Arbor, Mich. Also available in paper.
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12

Langham-Lopez, Jordan. "Coherent states and wave packet dynamics for the Bogoliubov-de Gennes equations." Thesis, University of Nottingham, 2016. http://eprints.nottingham.ac.uk/34172/.

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We investigate generalizations of coherent states as a means of representing the dynamics of excitations of the superconducting ground state. We also analyse the propagation of generalized coherent state wave packets under the Bogoliubov-de Gennes Hamiltonian. The excitations of the superconducting ground state are superpositions of electron and hole quasi-particles described by the Bogoliubov-de Gennes equations, that can only exist at energies outside the band gap. A natural generalization relevant to the excitations of the superconducting ground state is the tensor product of canonical and
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13

Ghinassi, Paolo [Verfasser]. "Investigating the dynamics of Rossby wave packets using Local Finite Amplitude Wave Activity / Paolo Ghinassi." Mainz : Universitätsbibliothek Mainz, 2020. http://d-nb.info/120272678X/34.

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14

Cheng, Xiaolu. "Mixed Quantum/Semiclassical Theory for Small-Molecule Dynamics and Spectroscopy in Low-Temperature Solids." Thesis, University of Oregon, 2013. http://hdl.handle.net/1794/13001.

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A quantum/semiclassical theory for the internal nuclear dynamics of a small molecule and the induced small-amplitude coherent motion of a low-temperature host medium is developed, tested and applied to simulate and interpret ultrafast optical signals. Linear wave-packet interferometry and time-resolved coherent anti-Stokes Raman scattering signals for a model of molecular iodine in a 2D krypton lattice are calculated and used to study the vibrational decoherence and energy dissipation of iodine molecules in condensed media. The total wave function of the whole model is approximately obtained
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15

Källman, Erik. "Quantum Dynamics Simulations Using the Standard Matching Pursuit Gaussian Wavepacket Method : Practical Considerations." Thesis, Uppsala universitet, Teoretisk kemi, 2014. http://urn.kb.se/resolve?urn=urn:nbn:se:uu:diva-228505.

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In any quantum dynamics method that approximates wave functions as a linearly combined basis set, non-orthogonality can be is a problem. It has been proven in previous studies that, by using the most standard form of Matching Pursuit in combination with a Gaussian wave packet ansatz, exact quantum-mechanical correspondence can be obtained for particle tunneling in one and two dimensions. This study is an attempt to prove that this approach can be generally applicable to systems of arbitrary dimension propagating with an an-harmonic potential, and that adaptive initial state sampling can be use
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16

Barbier, Maximilien. "Dynamics of matter wave packets in the presence of time-dependent absorption." Thesis, Northumbria University, 2017. http://nrl.northumbria.ac.uk/32543/.

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Atom-laser interaction is at the heart of the vibrant field of quantum optics. The dynamical properties of a moving atom submitted to a laser radiation are strongly influenced by the position- and time-dependence of the latter. The full physical state of the atom must include information about the centre-of-mass motion and the internal structure of the atom. It is challenging to obtain a complete description of the full state of the atom. However, there exists an alternative approach to the dynamics of an atom in the presence of a laser, which is based on the concept of matter-wave absorption.
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17

Couto, Rafael Carvalho. "Coupled electron-nuclear dynamics in inelastic X-ray scattering." Universidade Federal de Goiás, 2016. http://repositorio.bc.ufg.br/tede/handle/tede/7510.

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Submitted by JÚLIO HEBER SILVA (julioheber@yahoo.com.br) on 2017-06-23T20:11:27Z No. of bitstreams: 2 Tese - Rafael Carvalho Couto - 2016.pdf: 25101346 bytes, checksum: 808fe5c57059f14ca58d1ef0dbe03f00 (MD5) license_rdf: 0 bytes, checksum: d41d8cd98f00b204e9800998ecf8427e (MD5)<br>Approved for entry into archive by Cláudia Bueno (claudiamoura18@gmail.com) on 2017-07-07T20:24:53Z (GMT) No. of bitstreams: 2 Tese - Rafael Carvalho Couto - 2016.pdf: 25101346 bytes, checksum: 808fe5c57059f14ca58d1ef0dbe03f00 (MD5) license_rdf: 0 bytes, checksum: d41d8cd98f00b204e9800998ecf8427e (MD5)<br>Made availa
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18

Whitfield, A. J. "Nonlinear dynamics of wave packets within the framework of the Ostrovsky equation and its generalisations." Thesis, University College London (University of London), 2016. http://discovery.ucl.ac.uk/1516052/.

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The long-time effect of weak rotation on an internal solitary wave is the decay into inertia-gravity waves and the eventual emergence of a coherent, steadily propagating, nonlinear wavepacket. There is currently no entirely satisfactory description of the wavepacket dynamics or why they form. This thesis examines the initial value problem within the context of the Ostrovsky, or rotation-modified KdV, equation. The linear Ostrovsky equation has maximum group velocity at a critical wave number, often called the zero-dispersion point. This point divides the spectrum into regions of modulational s
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19

Kovac, Philip. "Exploring time-dependent approaches towards the calculation of dynamics and spectroscopic signals: A mixed quantum/semiclassical wave packet method and the theory of transient absorption and femtosecond stimulated Raman scattering." Thesis, University of Oregon, 2018. http://hdl.handle.net/1794/23124.

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We present a time-dependent mixed quantum/semiclassical approach to calculating linear absorption spectra. Applying Variational Fixed Vibrational Basis/Gaussian Bath theory (FVB/GB) to the treatment of small molecules isolated in an extended cryogenic medium, an assumed time-scale separation between the few rapid, largely intramolecular modes of the guest and the several slower extended modes of the medium is utilized to partition a system from the surrounding bath. The system dynamics are handled with basis set methods, while the bath degrees of freedom are subject to a semiclasscial thawed G
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20

Latka, Tobias Thomas [Verfasser], Reinhard [Akademischer Betreuer] Kienberger, Andreas [Gutachter] Bausch, and Reinhard [Gutachter] Kienberger. "Few-Femtosecond Nuclear Wave Packet Dynamics in Ozone / Tobias Thomas Latka ; Gutachter: Andreas Bausch, Reinhard Kienberger ; Betreuer: Reinhard Kienberger." München : Universitätsbibliothek der TU München, 2018. http://d-nb.info/1153545918/34.

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21

Latka, Tobias Thomas Verfasser], Reinhard [Akademischer Betreuer] [Kienberger, Andreas [Gutachter] Bausch, and Reinhard [Gutachter] Kienberger. "Few-Femtosecond Nuclear Wave Packet Dynamics in Ozone / Tobias Thomas Latka ; Gutachter: Andreas Bausch, Reinhard Kienberger ; Betreuer: Reinhard Kienberger." München : Universitätsbibliothek der TU München, 2018. http://nbn-resolving.de/urn:nbn:de:bvb:91-diss-20180208-1421325-1-9.

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22

Hashemloo, Avazeh. "Numerical simulation of the dynamics of a trapped molecular ion." Doctoral thesis, Umeå universitet, Institutionen för fysik, 2016. http://urn.kb.se/resolve?urn=urn:nbn:se:umu:diva-118899.

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This thesis explores the dynamics of a heteronuclear diatomic molecular ion, possessing a permanent electric dipole moment, µ, which is trapped in a linear Paul trap and can interact with an off-resonance laser field. To build our model we use the rigid-rotor approximation, where the dynamics of the molecular ion are limited to its translational and rotational motions of the center-of-mass. These dynamics are investigated by carrying out suitable numerical calculations. To introduce our numerical methods, we divide our research topic into two different subjects. First, we ignore the rotational
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23

Brinne, Roos Johanna. "Electron Recombination with Small Molecular Ions." Licentiate thesis, Stockholm : Bioteknologi, Kungliga Tekniska högskolan, 2007. http://urn.kb.se/resolve?urn=urn:nbn:se:kth:diva-4375.

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24

Junginger, Marco Andrej [Verfasser], and Jörg [Akademischer Betreuer] Main. "Transition state theory for wave packet dynamics and its application to thermal decay of metastable nonlinear Schrödinger systems / Marco Andrej Junginger. Betreuer: Jörg Main." Stuttgart : Universitätsbibliothek der Universität Stuttgart, 2014. http://d-nb.info/1056910429/34.

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25

Troppmann, Stephanie [Verfasser], Caroline [Akademischer Betreuer] [Gutachter] Lasser, George A. [Gutachter] Hagedorn, and Alain [Gutachter] Joye. "Non-Hermitian Schrödinger dynamics with Hagedorn’s wave packets / Stephanie Troppmann ; Gutachter: Caroline Lasser, George A. Hagedorn, Alain Joye ; Betreuer: Caroline Lasser." München : Universitätsbibliothek der TU München, 2017. http://d-nb.info/1139493124/34.

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26

Krückl, Viktor [Verfasser], and Klaus [Akademischer Betreuer] Richter. "Wave packets in mesoscopic systems: From time-dependent dynamics to transport phenomena in graphene and topological insulators / Viktor Krückl. Betreuer: Klaus Richter." Regensburg : Universitätsbibliothek Regensburg, 2013. http://d-nb.info/1034198378/34.

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27

Chapman, Craig Thomas 1980. "Vibrational wave packets: Molecular state reconstruction in the gas phase and mixed quantum/semiclassical descriptions of small-molecule dynamics in low-temperature solid media." Thesis, University of Oregon, 2010. http://hdl.handle.net/1794/10584.

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xiv, 195 p. : ill. (some col.) A print copy of this thesis is available through the UO Libraries. Search the library catalog for the location and call number.<br>We explore the reconstruction of B-state vibrational wave packets in I 2 from simulated two-color nonlinear wave packet interferometry data. As a simplification of earlier proposals, we make use of different vibrational energy ranges in the B-state--rather than different electronic potential surfaces--for the short-pulse preparation and propagation of both target and reference wave packets. Numerical results from noisy interferogra
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28

Grüner, Barbara, Martin Schlesinger, Philipp Heister, Walter T. Strunz, Frank Stienkemeier, and Marcel Mudrich. "Vibrational relaxation and dephasing of Rb2 attached to helium nanodroplets." Saechsische Landesbibliothek- Staats- und Universitaetsbibliothek Dresden, 2014. http://nbn-resolving.de/urn:nbn:de:bsz:14-qucosa-138750.

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The vibrational wave-packet dynamics of diatomic rubidium molecules (Rb2) in triplet states formed on the surface of superfluid helium nanodroplets is investigated both experimentally and theoretically. Detailed comparison of experimental femtosecond pump–probe spectra with dissipative quantum dynamics simulations reveals that vibrational relaxation is the main source of dephasing. The rate constant for vibrational relaxation in the first excited triplet state 13Σ+g is found to be constant γ ≈ 0.5 ns−1 for the lowest vibrational levels v [less, similar] 15 and to increase sharply when exciting
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29

Grüner, Barbara, Martin Schlesinger, Philipp Heister, Walter T. Strunz, Frank Stienkemeier, and Marcel Mudrich. "Vibrational relaxation and dephasing of Rb2 attached to helium nanodroplets." Royal Society of Chemistry, 2011. https://tud.qucosa.de/id/qucosa%3A27778.

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The vibrational wave-packet dynamics of diatomic rubidium molecules (Rb2) in triplet states formed on the surface of superfluid helium nanodroplets is investigated both experimentally and theoretically. Detailed comparison of experimental femtosecond pump–probe spectra with dissipative quantum dynamics simulations reveals that vibrational relaxation is the main source of dephasing. The rate constant for vibrational relaxation in the first excited triplet state 13Σ+g is found to be constant γ ≈ 0.5 ns−1 for the lowest vibrational levels v [less, similar] 15 and to increase sharply when exciting
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30

Thiem, Stefanie. "Electronic and Photonic Properties of Metallic-Mean Quasiperiodic Systems." Doctoral thesis, Universitätsbibliothek Chemnitz, 2012. http://nbn-resolving.de/urn:nbn:de:bsz:ch1-qucosa-83831.

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Understanding the connection of the atomic structure and the physical properties of materials remains one of the elementary questions of condensed-matter physics. One research line in this quest started with the discovery of quasicrystals by Shechtman et al. in 1982. It soon became clear that these materials with their 5-, 8-, 10- or 12-fold rotational symmetries, which are forbidden according to classical crystallography, can be described in terms of mathematical models for nonperiodic tilings of a plane proposed by Penrose and Ammann in the 1970s. Due to the missing translational symmetry of
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31

Rutz, Soeren, and Luebeck. "Femtosekundenspektroskopie zur Wellenpaketdynamik in Alkalidimeren und." Phd thesis, 2000. http://www.diss.fu-berlin.de/2000/127/index.html.

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32

Pettey, Lucas Richard 1974. "Quantum dynamics on adaptive grids : the moving boundary truncation method." 2008. http://hdl.handle.net/2152/18283.

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A novel method for integrating the time-dependent Schrödinger equation is presented. The moving boundary truncation (MBT) method is a time-dependent adaptive method that can significantly reduce the number of grid points needed to perform accurate wave packet propagation while maintaining stability. Hydrodynamic quantum trajectories are used to adaptively define the boundaries and boundary conditions of a fixed grid. The result is a significant reduction in the number of grid points needed to perform accurate calculations. A variety of model potential energy surfaces are used to evaluate the m
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33

Fabčič, Tomaž [Verfasser]. "Wave packet dynamics in atomic systems and Bose-Einstein condensates / vorgelegt von Tomaž Fabčič." 2008. http://d-nb.info/989894703/34.

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34

Andrianov, Ivan V. [Verfasser]. "Simulations of ultrafast photoinduced wave packet dynamics in three dimensions / vorgelegt von Ivan Andrianov." 1999. http://d-nb.info/960673458/34.

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35

Meinhold, Dirk [Verfasser]. "Spatial dynamics of wave packets in semiconductor heterostructures / vorgelegt von Dirk Meinhold." 2005. http://d-nb.info/976471914/34.

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36

Hamik, Chad Thomas Steinbock Oliver. "Anomalous dispersion of excitation pulses in the 1,4-cyclohexanedione Belousov-Zhabotinsky reaction." 2003. http://etd.lib.fsu.edu/theses/available/etd-08112004-123237.

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Thesis (Ph. D.)--Florida State University, 2003.<br>Advisor: Dr. Oliver Steinbock, Florida State University, College of Arts and Sciences, Dept. of Chemistry and Biochemistry. Title and description from dissertation home page (Aug. 27, 2004). Includes bibliographical references.
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37

Belz, Steffen [Verfasser]. "Laser control of torsional nuclear wave packet dynamics via conical intersections = Laserkontrolle der Torsionsbewegungen von Kernwellenpaketen über konische Durchschneidungen / Steffen Belz." 2011. http://d-nb.info/1013833171/34.

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38

Lee, Tsung Yen, and 李宗晏. "I. Tuning the photocycle kinetics of bacteriorhodopsin in lipid nanodiscs II. Applications of the truncated grid method to quantum wave packet dynamics." Thesis, 2016. http://ndltd.ncl.edu.tw/handle/51023186146998407134.

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碩士<br>國立清華大學<br>化學系<br>104<br>I. Monodisperse lipid nanodisc provides bacteriorhodopsin (bR), a light-driven proton pump membrane protein, excellent aqueous dispersibility and native-mimic lipid bilayer environment. To study the lipid-composition dependence of the photo-cycle kinetics of bR, the monomeric bR was embedded in nanodiscs composed of different ratios of negatively-charged lipids (DMPG, DOPG) to zwitterionic lipids (DMPC, DOPC). The steady-state absorption spectra of light-adapted monomeric bR in nanodiscs composed of different lipid ratios exhibited the conservation of the tertiary
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39

Thiem, Stefanie. "Electronic and Photonic Properties of Metallic-Mean Quasiperiodic Systems." Doctoral thesis, 2011. https://monarch.qucosa.de/id/qucosa%3A19673.

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Understanding the connection of the atomic structure and the physical properties of materials remains one of the elementary questions of condensed-matter physics. One research line in this quest started with the discovery of quasicrystals by Shechtman et al. in 1982. It soon became clear that these materials with their 5-, 8-, 10- or 12-fold rotational symmetries, which are forbidden according to classical crystallography, can be described in terms of mathematical models for nonperiodic tilings of a plane proposed by Penrose and Ammann in the 1970s. Due to the missing translational symmetry o
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