Etude théorique de processus cohérents dans les alcalinos-terreux PDF Download
Are you looking for read ebook online? Search for your book and save it on your Kindle device, PC, phones or tablets. Download Etude théorique de processus cohérents dans les alcalinos-terreux PDF full book. Access full book title Etude théorique de processus cohérents dans les alcalinos-terreux by Martial Millet. Download full books in PDF and EPUB format.
Author: Martial Millet
Publisher:
ISBN:
Category :
Languages : en
Pages : 413
Get Book Here
Book Description
Theoretical investigations on the dynamics of coherent excitation and ionization processes in alkaline-earth atoms are reported. Atomic parameters required to the dynamical treatment are calculated with the R-matrix method in combination with the multichannel quantum defect theory (MQDT). We investigate the photoionization yields into three continuum channels of barium observed by Elliott et al in the study of coherent control through two-photon two-color interfering paths resonantly enhanced by an intermediate state. The dynamics studied by introducing an effective hamiltonian is described as an adiabatic process governed by the coherent excitation of the intermediate states. By using a time-dependent MQDT formalism valid in the weak field limit, we analyze the experiment on coherent control of energy and angular distribution of autoionized wave packets performed in calcium by van Leeuwen et al using isolated core excitation from a Rydberg state and optical Ramsey-like pump-probe technique. The dynamics of autoionization processes is investigated by studying the time dependence of radial electron flux created by one or two short pulses with a possible chirp and observed at fixed macroscopic distances from the atom. We develop a new formalism suitable to investigate autoionizing wave packets of narrow resonances created by short and intenses pulses. Resonances are explicitly introduced in the evolution equations. Their energies (positions and widths) in the complex plane, their couplings with continuum channels due to atomic interactions and their couplings with low-lying discrete states induced by the laser field are deduced from the MQDT formulation and are numerically calculated from the poles and the residues of the physical scattering matrix S and of the light shift operator. The relation between these poles and the Siegert states is presented and identification of the resonances is deduced from the corresponding wave functions.
Author: Martial Millet
Publisher:
ISBN:
Category :
Languages : en
Pages : 413
Get Book Here
Book Description
Theoretical investigations on the dynamics of coherent excitation and ionization processes in alkaline-earth atoms are reported. Atomic parameters required to the dynamical treatment are calculated with the R-matrix method in combination with the multichannel quantum defect theory (MQDT). We investigate the photoionization yields into three continuum channels of barium observed by Elliott et al in the study of coherent control through two-photon two-color interfering paths resonantly enhanced by an intermediate state. The dynamics studied by introducing an effective hamiltonian is described as an adiabatic process governed by the coherent excitation of the intermediate states. By using a time-dependent MQDT formalism valid in the weak field limit, we analyze the experiment on coherent control of energy and angular distribution of autoionized wave packets performed in calcium by van Leeuwen et al using isolated core excitation from a Rydberg state and optical Ramsey-like pump-probe technique. The dynamics of autoionization processes is investigated by studying the time dependence of radial electron flux created by one or two short pulses with a possible chirp and observed at fixed macroscopic distances from the atom. We develop a new formalism suitable to investigate autoionizing wave packets of narrow resonances created by short and intenses pulses. Resonances are explicitly introduced in the evolution equations. Their energies (positions and widths) in the complex plane, their couplings with continuum channels due to atomic interactions and their couplings with low-lying discrete states induced by the laser field are deduced from the MQDT formulation and are numerically calculated from the poles and the residues of the physical scattering matrix S and of the light shift operator. The relation between these poles and the Siegert states is presented and identification of the resonances is deduced from the corresponding wave functions.
Author: Claude Cohen-Tannoudji
Publisher: John Wiley & Sons
ISBN: 3527345558
Category : Science
Languages : en
Pages : 790
Get Book Here
Book Description
This new, third volume of Cohen-Tannoudji's groundbreaking textbook covers advanced topics of quantum mechanics such as uncorrelated and correlated identical particles, the quantum theory of the electromagnetic field, absorption, emission and scattering of photons by atoms, and quantum entanglement. Written in a didactically unrivalled manner, the textbook explains the fundamental concepts in seven chapters which are elaborated in accompanying complements that provide more detailed discussions, examples and applications. * Completing the success story: the third and final volume of the quantum mechanics textbook written by 1997 Nobel laureate Claude Cohen-Tannoudji and his colleagues Bernard Diu and Franck Laloë * As easily comprehensible as possible: all steps of the physical background and its mathematical representation are spelled out explicitly * Comprehensive: in addition to the fundamentals themselves, the books comes with a wealth of elaborately explained examples and applications Claude Cohen-Tannoudji was a researcher at the Kastler-Brossel laboratory of the Ecole Normale Supérieure in Paris where he also studied and received his PhD in 1962. In 1973 he became Professor of atomic and molecular physics at the Collège des France. His main research interests were optical pumping, quantum optics and atom-photon interactions. In 1997, Claude Cohen-Tannoudji, together with Steven Chu and William D. Phillips, was awarded the Nobel Prize in Physics for his research on laser cooling and trapping of neutral atoms. Bernard Diu was Professor at the Denis Diderot University (Paris VII). He was engaged in research at the Laboratory of Theoretical Physics and High Energy where his focus was on strong interactions physics and statistical mechanics. Franck Laloë was a researcher at the Kastler-Brossel laboratory of the Ecole Normale Supérieure in Paris. His first assignment was with the University of Paris VI before he was appointed to the CNRS, the French National Research Center. His research was focused on optical pumping, statistical mechanics of quantum gases, musical acoustics and the foundations of quantum mechanics.
