Effect of electron correlation on the twoparticle dynamics of a helium atom in a strong laser pulse
(2002) In International Journal of Modern Physics B 16(3). p.415452 Abstract
 This review discusses the complicated twoelectron dynamics of a helium atom in an intense, short laser pulse. A helium gas in femtosecond laser pulses at long wave lengths (lambda similar to 700 nm) and high intensities (I similar to 10(15) W/cm(2)) produces surprisingly high numbers of He2+ ions. These laser fields cause large and fast electron oscillations, which makes a solution of the timedependent Schrodinger equation numerically demanding. The system can be studied using a onedimensional model atom, which has many of the same properties as the He atom. Using the onedimensional model, the importance of including electron correlation in a simplified description of the twoelectron dynamics is demonstrated. It is shown that electron... (More)
 This review discusses the complicated twoelectron dynamics of a helium atom in an intense, short laser pulse. A helium gas in femtosecond laser pulses at long wave lengths (lambda similar to 700 nm) and high intensities (I similar to 10(15) W/cm(2)) produces surprisingly high numbers of He2+ ions. These laser fields cause large and fast electron oscillations, which makes a solution of the timedependent Schrodinger equation numerically demanding. The system can be studied using a onedimensional model atom, which has many of the same properties as the He atom. Using the onedimensional model, the importance of including electron correlation in a simplified description of the twoelectron dynamics is demonstrated. It is shown that electron correlation becomes much less important if the laser field has a short wave length, in which case the electron oscillations are smaller and slower. The problem of including electron correlation in the calculations is discussed in terms of approaches such as timedependent HartreeFock, timedependent density functional theory and timedependent extended HartreeFock. Some of the commonly used semiclassical models for describing the doubleionization process are presented. (Less)
Please use this url to cite or link to this publication:
http://lup.lub.lu.se/record/342578
 author
 Dahlen, NilsErik ^{LU}
 organization
 publishing date
 2002
 type
 Contribution to journal
 publication status
 published
 subject
 in
 International Journal of Modern Physics B
 volume
 16
 issue
 3
 pages
 415  452
 publisher
 World Scientific
 external identifiers

 wos:000174143500001
 scopus:0037196656
 ISSN
 02179792
 DOI
 10.1142/S0217979202007987
 language
 English
 LU publication?
 yes
 id
 577f6b198af144bd890d3e8cf8ef2626 (old id 342578)
 date added to LUP
 20070815 14:31:12
 date last changed
 20180107 09:07:19
@article{577f6b198af144bd890d3e8cf8ef2626, abstract = {This review discusses the complicated twoelectron dynamics of a helium atom in an intense, short laser pulse. A helium gas in femtosecond laser pulses at long wave lengths (lambda similar to 700 nm) and high intensities (I similar to 10(15) W/cm(2)) produces surprisingly high numbers of He2+ ions. These laser fields cause large and fast electron oscillations, which makes a solution of the timedependent Schrodinger equation numerically demanding. The system can be studied using a onedimensional model atom, which has many of the same properties as the He atom. Using the onedimensional model, the importance of including electron correlation in a simplified description of the twoelectron dynamics is demonstrated. It is shown that electron correlation becomes much less important if the laser field has a short wave length, in which case the electron oscillations are smaller and slower. The problem of including electron correlation in the calculations is discussed in terms of approaches such as timedependent HartreeFock, timedependent density functional theory and timedependent extended HartreeFock. Some of the commonly used semiclassical models for describing the doubleionization process are presented.}, author = {Dahlen, NilsErik}, issn = {02179792}, language = {eng}, number = {3}, pages = {415452}, publisher = {World Scientific}, series = {International Journal of Modern Physics B}, title = {Effect of electron correlation on the twoparticle dynamics of a helium atom in a strong laser pulse}, url = {http://dx.doi.org/10.1142/S0217979202007987}, volume = {16}, year = {2002}, }