Strong‐field coherent control of the proton momentum distribution arising from the n‐photon (n=1,2,3) field‐dressed adiabatic potentials of H2+.

A systematic directionality coherent control of total proton momentum distributions in the dissociative‐ionization of H2+ subjected to a strong field of six‐cycle laser pulses in a full range of carrier‐envelope phase ϑ is studied by solving a non‐Born‐Oppenheimer time‐dependent Schrödinger equation numerically. The trend of distributions involves insightful investigation into the spatial‐temporal overlap between nuclear wave packets evolving on the coupled field‐dressed electronic potentials of H2+ associated with the n‐photon potential crossings. This leads to new quantum images for the nonlinear nonperturbative interaction of H2+ with a strong field. It turns out that the symmetry of the ϑ‐dependent momentum distribution begins to break after undergoing interaction with one‐photon field‐dressed potentials. At this point, the most probable proton momentum distribution tends to move in a forward direction indicating also that the three‐photon field‐dressed potentials strongly govern the dissociative‐ionization pathway. [ABSTRACT FROM AUTHOR]