Search for dissertations about: "Wavepacket"

Showing result 1 - 5 of 11 swedish dissertations containing the word Wavepacket.

2. 1. Quantum Wavepacket Dynamics in Molecular and Trapped Ion Systems

   Author : Dong Wang; Tony Hansson; Volker Engel; Stockholms universitet; []
   Keywords : NATURVETENSKAP; NATURAL SCIENCES; wavepacket; revival; anisotropy; polarization; Molecular physics; Molekylfysik; kemisk fysik; Chemical Physics;

   Abstract : The motions of a wavepacket in the two coupled potentials studied in this thesis can be classified into either bistable or astable motion according to the wavepacket interference at the curve crossing. Bistable motion, in which the wavepacket performs a coupled oscillation but remains in the same adiabatic and diabatic state, can exist both in bound-bound systems and bound-unbound ones with long time stability. READ MORE

4. 2. Experimental Studies of Quantum Dynamics and Coherent Control in Homonuclear Alkali Diatomic Molecules

   Author : Bo Zhang; KTH; []
   Keywords : ultrafast laser spectroscopy; pump-probe technique; predissociation; wavepacket; spin-orbit interaction; coherent control; dephasing;

   Abstract : The main theme covered in this thesis is experimentalstudies of quantum dynamics and coherent control in homonuclearalkali diatomic molecules by ultrafast laser spectroscopy iththe implementation of pump-probe techniques.A series of experiments have been performed on the Rb2molecules in a molecular beam as well as in a thermal oven. READ MORE

5. 3. Electronic and Vibrational Coherence in Photosynthetic and Model Systems

   Author : Mirianas Chachisvilis; Kemisk fysik; []
   Keywords : NATURVETENSKAP; NATURAL SCIENCES; Kemi; Chemistry; Ultrafast relaxation; Porphyrins; Delocalization; Anisotropy; Wavepacket; Vibrational Coherence; Excitons; Electronic coherence; Energy transfer; Femtosecond spectroscopy; Photosynthesis;

   Abstract : Ultrafast optical response and excitation energy dynamics in light harvesting pigment-protein complexes and in a few model systems have been studied both experimentally and theoretically. Femtosecond light pulses were employed to excite the system and monitor the subsequent time evolution of the transient absorption kinetics and anisotropy. READ MORE

6. 4. Generation and metrology of ultrashort pulses and their application in attosecond science

   Author : Lana Neoricic; Atomfysik; []
   Keywords : NATURVETENSKAP; NATURAL SCIENCES; ultrashort; filamentation; femtosecond; dispersion scan; RABBIT; photoionisation; attosecond; interferometry; pump-probe; spectroscopy; photoelectron; wavepacket; Fysicumarkivet A:2022:Neoricic;

   Abstract : This thesis deals with the dynamical processes in atoms and small molecules initiated by the absorption of ultrashort, coherent light pulses. The studied phenomena takeplace on the femtosecond (1 fs = 10−15 s) and attosecond (1 as = 10−18 s) timescales and critically depend on the properties of the light fields that drive them. READ MORE

7. 5. Wavepacket calculations of scattering from surfaces

   Author : Charlotta M Hedenäs; Chalmers tekniska högskola; []
   Keywords : NATURVETENSKAP; NATURAL SCIENCES; wavepackets; inelastic scattering; surfaces; lifetimes; tunneling; phonons;

   Abstract : .... READ MORE