Time-resolved hyperfast processes of strongly correlated electrons during the coherent excitation and decay of multiply excited and inner-hole excited states

Mercouris, Th; Komninos, Y; Nicolaides, CA

dc.contributor.author	Mercouris, Th	en
dc.contributor.author	Komninos, Y	en
dc.contributor.author	Nicolaides, CA	en
dc.date.accessioned	2014-03-01T01:27:29Z
dc.date.available	2014-03-01T01:27:29Z
dc.date.issued	2007	en
dc.identifier.issn	1050-2947	en
dc.identifier.uri	https://dspace.lib.ntua.gr/xmlui/handle/123456789/18470
dc.subject.classification	Optics	en
dc.subject.classification	Physics, Atomic, Molecular & Chemical	en
dc.subject.other	Coherent light	en
dc.subject.other	Continuous time systems	en
dc.subject.other	Excited states	en
dc.subject.other	Perturbation techniques	en
dc.subject.other	Schrodinger equation	en
dc.subject.other	Coherent excitation	en
dc.subject.other	Continuous spectrum	en
dc.subject.other	Correlated electrons	en
dc.subject.other	State-specific expansion	en
dc.subject.other	Optical correlation	en
dc.title	Time-resolved hyperfast processes of strongly correlated electrons during the coherent excitation and decay of multiply excited and inner-hole excited states	en
heal.type	journalArticle	en
heal.identifier.primary	10.1103/PhysRevA.76.033417	en
heal.identifier.secondary	http://dx.doi.org/10.1103/PhysRevA.76.033417	en
heal.identifier.secondary	033417	en
heal.language	English	en
heal.publicationDate	2007	en
heal.abstract	In the framework of the state-specific expansion approach, we have solved nonperturbatively the time-dependent Schrödinger equation for systems involving the time-dependent excitation of nonstationary states by hypershort one or two electromagnetic pulses. The related problems concern the quantitative determination of the consequences of strong electron correlation in excited atomic states of the discrete or of the continuous spectrum. As prototypical applications we chose the time-resolved coherent excitation and decay of the 2s -hole 1 s2 2s2 p6 3 s2 3p P0 1,3 Auger states of aluminum, where dominant channels representing one- as well as two-electron continua are taken into account, and the preparation of nonstationary states and the subsequent electron correlation beats in Al and in N3+. Calculations for the problem of coherent inner-hole ionization and Auger decay in Al account for the effect of interference coming from the presence of the channel of direct two-electron ionization. The result is that for the Al+ P01 channel the Auger electron distribution is asymmetric. On the contrary, for the Al+ P03 channel the contribution of the direct two-electron ionization is weak and the corresponding Auger distribution is essentially symmetric. The intensities used were weak, so as to avoid shifts and to render high order processes beyond those in resonance or near-resonance essentially negligible. As a result, the transition probabilities are very small, a result that ought to guide experimental work. For example, for intensity 8.75× 1011 W/cm2 the percentage of initial state population that ionizes is 0.02%. In spite of the overall reasonable approximations and size reductions, for the Al problem the system of coupled integrodifferential equations that had to be solved contains more than 300,000 basis wave functions. © 2007 The American Physical Society.	en
heal.publisher	AMER PHYSICAL SOC	en
heal.journalName	Physical Review A - Atomic, Molecular, and Optical Physics	en
dc.identifier.doi	10.1103/PhysRevA.76.033417	en
dc.identifier.isi	ISI:000249786000120	en
dc.identifier.volume	76	en
dc.identifier.issue	3	en