Quantum interference in strong-field ionization by a linearly polarized laser pulse and its relevance to tunnel exit time and momentum

We investigate the liberation of an atomic electron by a linearly polarized single-cycle near-infrared laser pulse having peak intensity that ensures tunneling. Based on phase space analysis and energy distribution in instantaneous potential, we reveal importance quantum interference between tunneling over-the-barrier pathways escape. Tunneling is blurred both time, contribution at mean almost negligible. suggest justify improved initial conditions for classical particle approximation strong-field ionization, based momentum function, show how to reconstruct them from detected escaped electron.