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Controlling Quantum Wave Packet of Electronic Motion on Field-Dressed Coulomb Potential of H2+ by Carrier-Envelope Phase-Dependent Strong Field Laser Pulses
  • Mohammad Noh Daud
Mohammad Noh Daud
University of Malaya
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Abstract

Solving numerically a non-Born-Oppenheimer time-dependent Schrödinger equation to study the dissociative-ionization of H2 subjected to strong field six-cycle laser pulses (I = 4 × 1014 W/cm2, λ = 800 nm) leads to newly ultrafast images of electron dynamics in H2+. The electron distribution in H2+ oscillates symmetrically with laser cycle with θ + π periodicity and gets trapped between two protons for about 8 fs by a Coulomb potential well. Nonetheless, this electron symmetrical distribution breaks up for the H2+ internuclear separation larger than 9 a.u. in the field-free region at a time duration of 24 fs as a result of the distortion of Coulomb potential where the ejected electron preferentially localizes in one of the double-well potential separated by the inner Coulomb potential barrier. Moreover, controlling laser carrier-envelope phase θ enables one to generate the highest total asymmetry Aetot of 0.75 and -0.75 at 10 and 190, respectively, associated with the electron preferential directionality being ionized to the left or the right paths along the H2+ molecular axis. Thus the laser-controlled electron slightly reorganizes its position accordingly to track the shift in the position of the protons despite much heavier the proton’s mass.

Peer review status:IN REVISION

04 Mar 2021Submitted to International Journal of Quantum Chemistry
04 Mar 2021Submission Checks Completed
04 Mar 2021Assigned to Editor
09 Mar 2021Reviewer(s) Assigned
09 Mar 2021Review(s) Completed, Editorial Evaluation Pending
09 Mar 2021Editorial Decision: Revise Minor
16 Mar 20211st Revision Received
15 Apr 2021Submission Checks Completed
15 Apr 2021Assigned to Editor
15 Apr 2021Reviewer(s) Assigned
31 May 2021Review(s) Completed, Editorial Evaluation Pending
01 Jun 2021Editorial Decision: Revise Major
04 Jun 20212nd Revision Received