194 citations · 1.8k across the 45 of their papers we have counts for
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Interferometric extraction of photoionization-path amplitudes and phases from time-dependent multiconfiguration self-consistent-field simulations
Yuki Orimo, Oyunbileg Tugs, Takeshi Sato +3
Bichromatic extreme-ultraviolet pulses from a seeded free-electron laser enable us to measure photoelectron angular distribution (PAD) as a function of the relative phase between t…
Atomic, molecular and optical physics applications of longitudinally coherent and narrow bandwidth Free-Electron Lasers
Carlo Callegari, Alexei N. Grum-Grzhimailo, Kenichi L. Ishikawa +3
Short wavelength Free-Electron Lasers (FELs) are the newest light sources available to scientists to probe a wide range of phenomena, with chemical, physical and biological applica…
Study of laser-driven multielectron dynamics of Ne atom using time-dependent optimized second-order many-body perturbation theory
Himadri Pathak, Takeshi Sato, Kenichi L. Ishikawa
We calculate the high-harmonic generation (HHG) spectra, strong-field ionization, and time-dependent dipole-moment of Ne using explicitly time-dependent optimized second-order many…
Strong-Field Electron Dynamics in Solids
Kenichi L. Ishikawa, Yasushi Shinohara, Takeshi Sato +1
Solid-state materials have recently emerged as a new stage of strong-field physics and attosecond science. The mechanism of the electron dynamics driven by an ultrashort intense la…
Time-dependent optimized coupled-cluster method for multielectron dynamics III: A second-order many-body perturbation approximation
Himadri Pathak, Takeshi Sato, Kenichi L. Ishikawa
We report successful implementation of the time-dependent second-order many-body perturbation theory using optimized orthonormal orbital functions called time-dependent optimized s…
Detecting electron-phonon couplings during photo-induced phase transition
Takeshi Suzuki, Yasushi Shinohara, Yangfan Lu +13
Photo-induced phase transitions have been intensively studied owing to the ability to control a material of interest in the ultrafast manner, which can induce exotic phases unable…