International workshop on theory for attosecond quantum dynamics (IWTAQD) 30

  Oct-Nov , 2025
 The workshop is open to everyone


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Participants

Brett DePaola	Kansas State U	Photo association, Atomic physics experiments
Liang-You Peng	Peking U	Strong field physics theory
Susumu Kuma	Rikkyo U	He droplet
Tomoya Mizuno	U of Tokyo	HHG experiments
Erik  Lötstedt	Riken	Atomic Physics theory
Akiyoshi Hishikawa	Nagoya U	Co-Chair, FEL, Molecular dynamics	Nov 10-11
Runa Kuroda	Nagoya U	Molecular dynamics experiment	Nov 10-11
Yuki Ono	Nagoya U	Molecular dynamics experiment	Nov 10-11
Michio Matsuzawa	UEC	AMO physics theory	Nov 11
Shinichi Watanabe	UEC	AMO physics theory	Nov 11
Yusuke Furukawa	UEC		Nov 11
Toru Morishita	UEC	Chair
Hiroka Hasegawa	UEC	Molecular dynamics theory/experiment
Saeed Muhammad	UEC	He dynamics theory
Frederic Ongonwou	UEC	HHG theory
Shehroz Khalid	UEC	He dynamics theory
Narihisa Tsuzuki	UEC	Molecular dynamics theory
Yushi Ishida	UEC	He dynamics
Shinji Ito	UEC	HHG
Torugo Fukuhara	UEC
Reiki Seino	UEC	Spin-Orbit couplings in strong field ionization
Raees Ahmad	UEC	Tunneling ionization theory

Seminar Program (tentative)

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Oct 25  (Sat) 2025
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    FREE DISCUSSION
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Nov 7  (Fri)-13(Thr) 2025
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    FREE DISCUSSION
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Nov 11  (Tue) 2025
Venue: Bldg East-6, Room 803

30+10 min or 15+5 min
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12:30-13:30 FREE DISCUSSION
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13:30-14:10  Liang-You Peng (Peking U)
"High-order harmonic generation in solids"
Abstract:
In this talk, I will describe the methodology to deal with the high-order harmonic generation (HHG) in solids. The features of HHG in solids are jointly decided by the driving lasers and the intrinsic properties of the band structures of the materials. I will discuss the HHG in various materials driven by structure lights, and how one can extract the Berry phase information from the HHG spectra. 

14:10-14:50 Tomoya Mizuno (U Tokyo)
"Observation of evanescent-field-induced harmonic generation in pre-ionized liquid plasmas"
Abstract:
We study evanescent-field-induced harmonic generation in pre-ionized liquid ethanol and water above the critical plasma density. By varying the near IR pump intensity, we can change the generated electron density in the liquid targets. When the electron density ionized by the pump pulse is above the critical plasma density, we observe narrow spectral width of the harmonics. By solving the nonlinear propagation equation, it is clearly shown that the harmonics are generated by the penetrating evanescent field. The intense evanescent field has a potential application to study strong field physics beyond the electric dipole approximation due to its nonuniform electric field.

14:50-15:10 Runa Kuroda (Nagoya U)
"Molecular orbital chirality of methyloxirane studied by tunnel electron circular dichroism in intense laser fields"
Abstract:
 Photoelectron circular dichroism (PECD) of methyloxirane in intense laser fields (1035 nm, 35 fs, ~10^13 W/cm^2) is investigated by electron-ion coincidence momentum imaging. The transverse momentum distributions show a clear asymmetry between the forward and backward components along the laser propagation direction, or PECD. A theoretical calculation based on a tunnel ionization theory suggests that the characteristics of observed tunnel PECD reflect the molecular orbital structure.

15:10-15:30 Yuki Ono (Nagoya U)
"Selective bond dissociation of vibrationally highly excited NO<sub>2<\sub> by ω-2ω intense laser pulses"
Abstract:
Waveform-shaped intense laser pulses are a powerful tool for molecular reaction control through nonlinear interactions. To elucidate the underlying mechanism of such reaction control, we focus on the asymmetric Coulomb explosion process of vibrationally excited NO2, NO22+ →NO+ + O+, induced by ω-2ω intense laser fields (I~1014 W/cm2). We performed three-dimensional momentum imaging of the fragment ions produced in the dissociation. In this talk, we will discuss how the initial vibrational state influences the reaction control mechanism.

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15:30-16:00 FREE DISCUSSION
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16:00-16:40 Brett DePaola (KSU)
"Reduction in Methane Emissions from Beef Cattle Resulting from a Sorghum-Based Finishing Diet"
Abstract:
We will describe our use of dual-frequency-comb spectroscopy in measuring the emission of methane and other gases from beef cattle.  Our latest results are focused on the dependence of these emissions on what beef cattle are fed while in feedlots.

16:40-17:10 Susumu Kuma (St Paul U)
"Nanoscale superfluid dynamics probed in He droplets"
 Abstract:
Superfluid He nanodroplets provide a way of approaching at the atomic scale the superfluidity, one of the macroscopic quantum many-body phenomena. Recent progress in superfluid dynamics studies by optical fields is reviewed in this talk.

17:10-17:50 Erik Lötstedt (RIKEN)
"Quantum computing of rovibrational wave functions"
Abstract:
Quantum computing of electronic wave functions has received a lot of attention. However, in order to calculate molecular energy levels, we must also solve the rovibrational structure problem. For a polyatomic molecule, this is a difficult problem. I will discuss the quantum computing of rovibrational energy levels based on the qubit form of the Watson Hamiltonian.

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17:50- FREE DISCUSSION
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Toru Morishita,UEC