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SUMMARY:Simple model of dissociation based on time-dependent Faddeev equat
 ions
DTSTART;VALUE=DATE-TIME:20220715T103000Z
DTEND;VALUE=DATE-TIME:20220715T105000Z
DTSTAMP;VALUE=DATE-TIME:20260519T133632Z
UID:indico-contribution-212@events.sinp.msu.ru
DESCRIPTION:Speakers: Vladimir Roudnev (St Petersburg State University)\nF
 addeev equations play an important role as a backbone of computational and
  theoretical models of quantum few-body systems in nuclear\, atomic and mo
 lecular physics. Traditionally\, they are used in the context of bound sta
 te and scattering calculations in stationary approach. The Faddeev decompo
 sition of the operator can also be efficiently used for theoretical and nu
 merical modeling of essentially non-stationary processes\, such as dissoci
 ation and ionization of molecular ions in the external non-stationary fiel
 ds. Here we take a step towards more extensive usage of the Faddeev decomp
 osition for non-stationary systems by  giving an example of a simple model
  of the positive Hydrogen ion dissociation in a short intense laser field.
  \nAs is mentioned by Belyaev [1]\, the Faddeev decomposition allows us to
  formulate the simplest possible model of interatomic interaction by using
  a single two-body state projection of different components of the interac
 tion\, which\, unlike the traditional quantum chemistry approach\, gives t
 he results that are qualitatively comparable to the exact treatment of the
  problem. By including a non-stationary interaction with an external field
  we come to a system of non-stationary Faddeev equations that we solve num
 erically. We compare the dissociation probability and the kinetic energy r
 elease (KER) for the dissociated state obtained in the new and the more tr
 aditional time-dependent Schroedinger equation approaches [2]. \n\n1. Vlad
 imir B. Belyaev\, Lectures on the Theory of Few-Body Systems\, Springer Ve
 rlag (1990).\n2. V. Roudnev and B.D. Esry\, Phys. Rev. A. 71\,   013411 (2
 005).\n\nhttps://events.sinp.msu.ru/event/8/contributions/212/
LOCATION: Физический ф-т\, ЦФА
URL:https://events.sinp.msu.ru/event/8/contributions/212/
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