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Chemistry: Recent submissions
Now showing items 741-760 of 964
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Optimization of high-order harmonic generation by genetic algorithm and wavelet time-frequency analysis of quantum dipole emission
(American Physical Society, 2001-07-13)We present an ab initio three-dimensional quantum study of the coherent control of high-order harmonic generation (HHG) processes in intense pulsed laser fields by means of the genetic algorithm optimization of the laser-pulse ... -
Nonlinear Schrödinger equation and dissipative quantum dynamics in periodic fields
(American Physical Society, 1989-10-15)The nonlinear dynamics of dissipative quantum systems in periodic fields is studied in the framework of a Gisin-like nonlinear Schrödinger equation with deterministic nonunitary quantum friction terms describing the ... -
Multiphoton ionization and high-order harmonic generation of He, Ne, and Ar atoms in intense pulsed laser fields: Self-interaction-free time-dependent density-functional theoretical approach
(American Physical Society, 2001-06-12)We present a detailed study of the multiphoton ionization and high-order harmonic generation (HHG) processes of rare-gas atoms (He, Ne, and Ar) in intense pulsed laser fields by means of a self-interaction-free time-dependent ... -
Multiphoton detachment of H-. II. Intensity-dependent photodetachment rates and threshold behavior—complex-scaling generalized pseudospectral method
(American Physical Society, 1994-10-01)We extend our previous perturbative study of the multiphoton detachment of H- [Phys. Rev. A 48, 4654 (1993)] to stronger fields by considering the intensity-dependent photodetachment rates and threshold behavior. An accurate ... -
Multiphoton detachment of H- near the one-photon threshold: Exterior complex-scaling–generalized pseudospectral method for complex quasienergy resonances
(American Physical Society, 1999-04-01)We perform a nonperturbative study of the multiphoton above-threshold detachment of H- in the presence of 1.640−μm and 1.908−μm laser fields by means of the non-Hermitian Floquet formalism. The laser parameters used are ... -
Multiphoton detachment of H-
(American Physical Society, 1993-12-01)Multiphoton detachment of H- is considered. An accurate one-electron model, which reproduces precisely the known H- detachment energy and the low-energy e-H(1s) elastic-scattering phase shifts, is developed. Generalized ... -
Error-prevention scheme with two pairs of qubits
(American Physical Society, 2002-09-04)A scheme is presented for protecting one-qubit quantum information against decoherence due to a general environment and local exchange interactions. The scheme operates essentially by distributing information over two pairs ... -
Efficient many-party controlled teleportation of multiqubit quantum information via entanglement
(American Physical Society, 2004-08-30)We present a way to teleport multiqubit quantum information from a sender to a distant receiver via the control of many agents in a network. We show that the original state of each qubit can be restored by the receiver as ... -
Effects of multiple electronic shells on strong-field multiphoton ionization and high-order harmonic generation of diatomic molecules with arbitrary orientation: An all-electron time-dependent density-functional approach
(American Physical Society, 2009-10-20)We present a time-dependent density-functional theory approach with proper long-range potential for an ab initio study of the effect of correlated multielectron responses on the multiphoton ionization (MPI) and high-order ... -
Effects of macroscopic propagation on spectra of broadband supercontinuum harmonics and isolated-attosecond-pulse generation: Coherent control of the electron quantum trajectories in two-color laser fields
(American Physical Society, 2012-07-13)Recently it was shown that broadband supercontinuum harmonics can be produced from the long-trajectory electrons in the single-atom response by the coherent control of the electron trajectories through optimized two-color ... -
Effects of electron structure and multielectron dynamical response on strong-field multiphoton ionization of diatomic molecules with arbitrary orientation: An all-electron time-dependent density-functional-theory approach
(American Physical Society, 2009-04-03)We present a time-dependent density-functional-theory approach for the ab initio study of the effect of correlated multielectron responses on the multiphoton ionization (MPI) of diatomic molecules N2, O2, and F2 in intense ... -
Multiphoton above-threshold ionization in superintense free-electron x-ray laser fields: Beyond the dipole approximation
(American Physical Society, 2013-02-13)We present an accurate and efficient nondipole computational approach in momentum space for the nonperturbative study of multiphoton above-threshold ionization (ATI) of atoms in superintense and ultrashort-wavelength laser ... -
Multiphoton above-threshold detachment of Li-: Exterior-complex-scaling– generalized-pseudospectral method for calculations of complex-quasienergy resonances in Floquet formulation of time-dependent density-functional theory
(American Physical Society, 2002-10-25)We extend the exterior-complex-scaling–generalized-pseudospectral (ECSGPS) method [D. A. Telnov and S. I. Chu, Phys. Rev. A 59, 2864 (1999)] to the nonperturbative calculations of complex-quasienergy resonances of many-electron ... -
Effect of electron correlation on high-order-harmonic generation of helium atoms in intense laser fields: Time-dependent generalized pseudospectral approach in hyperspherical coordinates
(American Physical Society, 2006-02-02)We present a time-dependent generalized pseudospectral (TDGPS) approach in hyperspherical coordinates for fully ab initio nonperturbative treatment of multiphoton dynamics of atomic systems in intense laser fields. The ... -
Multielectron effects on the orientation dependence and photoelectron angular distribution of multiphoton ionization of CO2 in strong laser fields
(American Physical Society, 2009-07-24)We perform an ab initio study of multiphoton ionization (MPI) of carbon dioxide in intense linearly polarized laser pulses with arbitrary molecular orientation by means of a time-dependent density-functional theory (TDDFT) ... -
Dynamics of multiphoton excitation and quantum diffusion in Rydberg atoms
(American Physical Society, 1989-02-15)We present a detailed two-dimensional (2D) quantal study of the dynamical evolution of microwave-driven Rydberg H atoms. We examine the range of validity of the conventional one-dimensional (1D) models and explore the ... -
Density-functional theory with optimized effective potential and self-interaction correction for ground states and autoionizing resonances
(American Physical Society, 1997-05-01)We present a self-interaction-free density-functional theory (DFT) for the treatment of both the static properties of the ground states and the photoionization processes of many-electron systems. The method is based on the ... -
Density-functional calculations on singly and doubly excited Rydberg states of many-electron atoms
(American Physical Society, 2002-05-07)Nearly 100 low-, moderately high-, and high-lying singly and doubly excited states of He, Li, and Be have been calculated using a nonvariational, work-function-based exchange potential within the nonrelativistic ... -
Cyclic quantum evolution and Aharonov-Anandan geometric phases in SU(2) spin-coherent states
(American Physical Society, 1990-01-01)We show that cyclic quantum evolution can be realized and the Aharonov-Anandan (AA) geometric phase can be determined for any spin-j system driven by periodic fields. Two methods are extended for the study of this problem: ... -
Creation and control of a single coherent attosecond xuv pulse by few-cycle intense laser pulses
(American Physical Society, 2006-08-08)We present ab initio quantum and classical investigations on the production and control of a single attosecond pulse by using few-cycle intense laser pulses as the driving field. The high-harmonic-generation power spectrum ...