International workshop on theory for attosecond quantum dynamics (IWTAQD) 20



Jan 14-Feb 2, 2019, supported in part by IAS-UEC






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Participants (Bldg. E-6, Rms. 525, 527)

Oleg I. Tolstikhin MIPT
 Adiabatic Theory, Tunneling ionization
 Jan 14-Feb 2, 2019
Chiennan Liu Fu-jen catholic U He dynamics under FEL/IR laser fields
 Jan 16-29, 2019
Akiyoshi Hishikawa Nagoya U FEL, Molecular dynamics
 Jan 24-25, 2019
Tomoyuki Endo
 Kansai Photon Science Institute Molecular ionization
 Jan 24-25, 2019
Hikaru Fujise
 Nagoya U Molecular dynamics Jan 24-25, 2019
Tomoya Mizuno U of Tokyo CEP dependent photoionization Jan 25, 2019
Jens Svensmark UEC
 Molecular dynaimcs in intense laser fields
 Jan 14-Feb 2, 2019




Michio Matsuzawa
 UEC
Jan 25, 2019
Shinichi Watanabe
 UEC Many body physics Jan 14-Feb 2, 2019
Yusuke Furukawa
 UEC
Jan 25, 2019
Toru Morishita UEC
 Chair
 Jan 14-Feb 2, 2019
Shun Ohgoda    
UEC
TDSE/Static Field Induced States   
Jan 14-Feb 2, 2019




Hirokazu Matsui UEC Molecular ionization
 Jan 14-Feb 2, 2019
Yushiro Suzuki UEC Trilobite structure
 Jan 14-Feb 2, 2019




Hisashi Ishinoda UEC Rescattering Jan 14-Feb 2, 2019
Shunsuke Inoue
 UEC
 Rescattering
 Jan 14-Feb 2, 2019
Jargalsaikhan Amgalan UEC
 Atomic Dynamics, computation
 Jan 14-Feb 2, 2019
Tomoya Kasuga
 UEC Molecular Dynamics
 Jan 14-Feb 2, 2019
Ryohei Okada
 UEC Molecular Dynamics Jan 14-Feb 2, 2019
Kenichi Kume
 UEC Molecular Dynamics Jan 14-Feb 2, 2019



Seminar Program
Jan 25  (Fri) 2019
Place: Bldg. East 6, Rm. 803

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09:30-10:00 FREE DISCUSSION
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10:00-10:45  Vinh N. T. Pham, Oleg I Tolstikhin (MIPT), and Toru Morishita
"Images of molecular orbitals in strong-field photoelectron momentum distributions generated by circularly polarized pulses"
Abstract:
Strong-field photoelectron momentum distributions (PEMDs) generated in the ionization of molecules by circularly polarized laser pulses contain valuable information on the structure of the ionizing molecular orbital. In this paper, we investigate using the adiabatic theory how this information is imprinted in and can be extracted from such PEMDs. The PEMDs have a donutlike shape. The variation of a PEMD along the donut reproduces the orientation dependence of the ionization rate of the ionizing orbital, and hence reflects its nodal structure and shape. The transverse structure of the PEMD in cross sections of the donut corresponding to orientations of the molecule at which the ionizing orbital has a node in the direction opposite to that of the instantaneous laser field reflects the interplay of two competing ionization channels, which provides an additional information on the orbital structure. We illustrate these features by the analysis of PEMDs for three states of different symmetries of the hydrogen molecular ion H2+.

10:45-11:30 Tomoya Mizuno  (U of Tokyo)
"Carrier-envelope phase dependent photoionization in intense few-cycle laser fields"
Abstract:
We study photoionization of Xe atoms in intense few-cycle laser fields. Angle-resolved photoelectron spectra were measured by a velocity map imaging (VMI) apparatus for various carrier-envelope phase (CEP). We observed a clear CEP dependent photoelectron yields. Moreover, the photoelectron spectra of high energy electrons show feature of half-cycle cutoffs, which provides us differential scattering cross sections.

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11:30-13:45  LUNCH DISCUSSION
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13:45-14:30 Hikaru Fujise (Nagoya U)
"Transversal momentum distribution of tunnelling electrons from molecular deuterium in circularly polarized intense laser fields"
Abstract
We measured the three-dimensional momentum of photoelectrons and ions produced from molecular deuterium (D2) in circularly polarized intense laser fields (800 nm, ~1014 W/cm2). The properties and characteristics of these tunnelling electronsf transverse momentum distribution will be reported.

14:30-15:15 Tomoyuki Endo (Kansai Photon Sci Inst)
"Control of dissociation reaction of OCS by phase-locked two-color laser fields"
Abstract:
We investigated dissociation reaction of OCS in phase-locked two-color laser fields by momentum imaging technique. In addition to a clear oscillatory behavior of the fragment ejection direction as a function of the relative phase of two-color laser fields, branching ratio between two dissociation channels also showed a dependence on the relative phase. It shows that post-ionization interaction plays an important role in the dissociation process of polar molecules.

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15:15-15:30 FREE DISCUSSION
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15:30-16:15 Jens Svensmark (UEC), O.I. Tolstikhin, and T. Morishita,
"Theoretical study of molecular ionization including nuclear motion"
Abstract:
Within strong-field physics, ionization is an important fundamental process. We are seeking to extend to the adiabatic theory developed in [Phys.  Rev.  A  86,  043417  (2012)] to include nuclear motion in the description of ionization.
At this point the numerical programs have been implemented and we are now performing calculations to test the adiabatic theory against TDSE solutions. In this talk I will give a status report on this work.

16:15-17:00 Chiennan Liu (Fu-jen Catholic U)
"Real-time monitoring of two-electron dynamics of helium in time domain"
Abstract:
There are few proposals for exploring ultrafast correlated electron motion in helium atoms using attosecond XUV pump–XUV probe schemes , although none of them has been realized in experiments. I will review these proposals and discuss if there are other possibilities.

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17:00-19:00 FREE DISCUSSION
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Toru Morishita,UEC