International workshop on theory for attosecond quantum dynamics (IWTAQD) 23

 


supported in part by World Research Unit (B-1) of Reaction Infography (R-ing) at Nagoya University



Jun 25 (online)
Please join via the link in the message of IWTAQD23 Confirmation.
The zoom session will be opened 30 min before the 1st talk.





back to IWTAQD page

Participants

Oleg I. Tolstikhin MIPT
 Adiabatic Theory, Tunneling ionization
 June 25, 2021
Frank Jensen
 Aarhus U
 Quantum chemistry
 June 25, 2021
Lars Bojer Madsen
 Aarhus U Strong Field Physics
 June 25, 2021
Simon V. B. Jensen Aarhus U Solid state HHG
 June 25, 2021
Akiyosi Hishikawa
 Nagoya U
 Co-Chair, Molecular tunneling ionization experiment
 June 25, 2021
Hiroka Hasegawa
 Nagoya U Molecular tunneling ionization experiment June 25, 2021
Daimu Ikeya
 Nagoya U Molecular tunneling ionization experiment June 25, 2021




Jens Svensmark UEC Molecular dynamics in intense laser fields June 25, 2021
Hirokazu Matsui UEC Molecular ionization June 25, 2021
Soleh Muminov
 MIPT
 Strong Field Theory June 25, 2021
tomohide uchida   
Nagoya U Strong Field Experiment
 June 25, 2021
Mizuho Fushitani
 Nagoya U Strong Field Experiment June 25, 2021
Yoshitada Yasuda
 UEC Strong Field Theor, computational physics June 25, 2021
Keiko Kato
 Nagoya U Strong Field Experiment June 25, 2021
Akitaka Matsuda
 Nagoya U Strong Field Experiment June 25, 2021
Vsevolod Avrutskiy
 MIPT Strong Field Theory June 25, 2021
貴大 播磨   
UEC Strong Field Theory, time-dependent dynamics
 June 25, 2021
Yuma Hamakawa
 UEC Strong Field Theor, rescattering processes June 25, 2021
Yuki Ono
 Nagoya U Strong Field Experiment June 25, 2021
Raijumon Puthumpally Joseph 
Aarhus U Strong Field Theory June 25, 2021
Shinichi Watanabe
 UEC Many-body interactions
 June 25, 2021
佑一郎 齊藤
 UEC Strong Field Theory, visualization of atomic/molecular dynamics
Yuya Okumura
 Nagoya U Strong Field Experiment
Fujise Hikaru
 Nagoya U Molecular ionization
Michio Matsuzawa
 UEC
 Rydberg states, Quantum three-body systems
Toru Morishita UEC Chair June 25, 2021



Workshop Program (tentative)

June 25  (Fri) 2021
Online session, Time is in JST (UTC+9000)

Please register in advance for this meeting:
https://us02web.zoom.us/meeting/register/tZwpd-6vqD4rHNOCkc2r481osZnOh6pe-Syn

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15:30-16:00  FREE DISCUSSION (please check connection/sharing screen during this time
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Chair, T. Morishita

16:00-16:25  Oleg I. Tolstikhin (MIPT)
"Nonadiabatic corrections to the shape of strong-field photoelectron momentum distributions generated by circularly polarized pulses"
Abstract:
In the adiabatic regime, strong-field photoelectron momentum distributions generated by circularly polarized pulses have a donut-like shape. I will discuss nonadiabatic corrections to the geometry of the donut.


16:25-16:50 Hirokazu Matsui (UEC)
"Weak-field asymptotic theory of tunneling ionization of the hydrogen molecule including core polarization, spectator nucleus, and internuclear motion effects"
Abstract:
We theoretically study the tunneling ionization of the hydrogen molecule in the static electric field with our state-of-art theory. This theory gives ionization rate based on leading-order many-electron weak-field asymptotic theory, and successively incorporates core polarization, spectator nucleus, and internuclear motion effects. Our results with including these physical effects are in good agreement with ab-initio calculations for H_2 with frozen nuclei and experiments on anisotropy of yields for H_2 and D_2.

16:50-17:15 Hiroka Hasegawa, Akitaka Matsuda, Akiyoshi Hishikawa (Nagoya U)
"Selective bond breaking of CH4 by ω-2ω Intense laser pulses"
Abstract:
We observed two dissociative ionization processes, CH4(+)→H(+)+CH3 and CH4(+)→CH3(+)+H, and two Coulomb explosion processes, CH4(2+)→CH3(+)+H(+) and CH4(2+)→CH2(+)+H2(+) in phase-locked ω-2ω intense laser fields by measuring the three-dimensional momentum distribution. Each fragmentation pathway exhibits a characteristic phase dependence. We discuss the asymmetry of fragmentation in terms of the ionization and dissociation dynamics in ω-2ω intense laser fields.

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17:15-17:30 BREAK
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Chair, A. Hishikawa

17:30-17:55 Simon V. B. Jensen (Aarhus U)
"Laser-induced correlation effects in high-harmonic generation in band gap materials"
Abstract:
We have theoretically studied electron-correlation effects in high-harmonic generation in a linear chain model for a generic band-gap material both for a finite system and for a bulk system. We introduce a technique to probe these ultrafast many-electron dynamics to significantly enhance the harmonic spectra, by a two-color pump-probe scheme.

17:55-18:20 Daimu Ikeya, Hikaru Fujise, Akitaka Matsuda, Mizuho Fushitani, Akiyoshi Hishikawa (Nagoya U)
 "Tilted molecular-frame angular distribution of tunneling electrons from O2 in circularly polarized intense laser fields by electron-ion coincidence momentum imaging"
Abstract:
We measured molecular-frame photoelectron angular distribution (MFPAD) of O2 molecule in circularly polarized intense laser fields by electron-ion coincidence momentum imaging. The MFPAD showed an elliptical distribution, tilted by about 50˚ with respect to the molecular axis. The result by using probe laser pulse will also be discussed.

18:20-18:45 Jens Svensmark, Oleg I. Tolstikhin, Toru Morishita (UEC)
"Adiabatic theory of strong-field ionization of molecules with nuclear motion "
Abstract:
In recent years there has been an increased interest in laser pulses in the mid-infrared and terahertz regimes in the strong field community. With such pulses it could become possible to measure molecular dynamics in detail. However, most theoretical methods are unable to describe what happens in these regimes, due to the large ranges of the dynamic variables involved. Unlike such methods, the adiabatic theory of ionization for atoms [1,2] works well in this regime, since it exploits the slow variations of the laser field compared to motion inside the atom.  Here we present the recently developed extensions of the adiabatic theory to molecules (AAnf) [3]. It treats nuclear motion in addition to all interactions among nuclei, electrons and the laser field. We will demonstrate the accuracy of the theory by comparing with exact solutions of the time-dependent Schrödinger equation (TDSE). We will also show an application of the theory to explain why the energy width of the vibrational state distribution in the molecular ion shrinks when isotopes with heavier nuclear masses are used.
  Recently we have also been working on including the effect of rescattering into the theory. Building upon the work in Ref. [4], this makes it possible to recreate the nuclear wave packet in the molecular ion from measurements of the photo-electron distributions over nuclear vibrational states.

  [1] Tolstikhin O I, Morishita T, Watanabe S., Phys Rev A 81, 033415 (2010)
  [2] Tolstikhin O I, Morishita T., Phys Rev A 86, 043417 (2012)
  [3] Svensmark J, Tolstikhin O I, Morishita T., Phys Rev A 101, 053422 (2020)
  [4] Morishita T, Tolstikhin O I. Phys Rev A 96, 053416 (2017)

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18:45-  FREE DISCUSSION  Let's have a chat. Bring food/drink, please.
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Toru Morishita,UEC