Current Research projects:
Attosecond pulses probing electron dynamics: The natural time scale for the electronic motion in atoms and molecules is in the order of 100 attoseconds (1as=10-18 seconds) or less. With the emergence of light pulses of duration of hundreds of attoseconds or less, it becomes possible to ask whether one can interrogate how the motion of the electrons in an atom is affected by each other. The simplest system that such an effect can be probed is the helium atom. more...
Mapping Moelcular orbitals with short intense laser pulses: By doubly ionizing the molecules with sub-10fs laser pulses and measuring the angular distribution of the fragmented ions, the geometric shape of the molecular orbitals can be observed directly. more..
Reading Molecular Clock with sub-fs precision: By measuring the kinetic energy release of the two protons, the time between the two ionization events of the H2 molecule can be determined to an accuracy of better than one femtosecond. By changing the laser intensity or pulse duration, the time interval between the two ionizations can be controlled. more..
Quantum chaos in helium atom:
The motion of classical helium is chaotic. How does the classical
chaos manifests itself in quantum mechanics? The experimental observations so
far show that the spectra of He are very regular. We show that only when both
electrons are excited and only when the total energy is about a fraction of an
electron volt from the double ionization threshold does the helium begin to show
quantum chaos-- as measured from the level spacing statistic. more..
All you want to know about electron correlation:Meaning of Pauli correlation Classification of triply excited states How to visualize correlations
Full Publication List: link to my publication list