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dc.contributor.authorChu, Shih-I
dc.contributor.authorRoy, Amlan K.
dc.date.accessioned2014-12-02T19:43:27Z
dc.date.available2014-12-02T19:43:27Z
dc.date.issued2002-03-18
dc.identifier.citationRoy, Amlan K. & Chu, Shih-I. "Quantum-fluid-dynamics approach for strong-field processes: Application to the study of multiphoton ionization and high-order harmonic generation of He and Ne atoms in intense laser fields." Phys. Rev. A 65, 043402 – Published 18 March 2002. http://dx.doi.org/10.1103/PhysRevA.65.043402.
dc.identifier.urihttp://hdl.handle.net/1808/16007
dc.descriptionThis is the published version, also available here: http://dx.doi.org/10.1103/PhysRevA.65.043402.
dc.description.abstractWe explore the feasibility of extending the quantum-fluid dynamics (QFD) approach for quantitative investigation of nonlinear optical processes of many-electron quantum systems in intense laser fields. Through the amalgamation of the QFD and density-functional theory (DFT), a single time-dependent hydrodynamical equation of motion can be derived. This equation has the form of a generalized nonlinear Schrödinger equation (GNLSE) but includes the many-body effects through a local time-dependent exchange-correlation potential. The time-dependent generalized pseudospectral method is extended to the solution of the GNLSE in spherical coordinates, allowing nonuniform spatial discretization and efficient, accurate solution of the hydrodynamical density and wave function in space and time. The procedure is applied to the study of multiphoton ionization (MPI) and high-order harmonic generation (HHG) of He and Ne atoms in intense laser fields. Excellent agreement with other recent self-interaction-free time-dependent DFT calculations is obtained for He, while for Ne, good agreement is achieved. Four different exchange-correlation energy functionals are used in the study with an aim to explore the roles of exchange and correlation on MPI/HHG processes in details. The method offers a conceptually appealing and computationally practical approach for nonperturbative treatment of strong-field processes of many-electron systems beyond the time-dependent Hartree-Fock level.
dc.publisherAmerican Physical Society
dc.titleQuantum-fluid-dynamics approach for strong-field processes: Application to the study of multiphoton ionization and high-order harmonic generation of He and Ne atoms in intense laser fields
dc.typeArticle
kusw.kuauthorChu, Shih-I
kusw.kuauthorRoy, Amlan K.
kusw.kudepartmentChemistry
kusw.oastatusna
dc.identifier.doi10.1103/PhysRevA.65.043402
kusw.oaversionScholarly/refereed, publisher version
kusw.oapolicyThis item does not meet KU Open Access policy criteria.
dc.rights.accessrightsopenAccess


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