The question of how long it takes a particle to tunnel through a potential barrier has been a
subject of intense theoretical debate for the last 80 years. In this decade of attosecond …

The last decade has seen an intense renewed debate on tunnelling time, both from a
theoretical and an experimental perspective. Here, we review recent developments and new …

The photoelectric effect is not truly instantaneous but exhibits attosecond delays that can
reveal complex molecular dynamics,,,,,–. Sub-femtosecond-duration light pulses provide the …

We investigate experimentally the validity of proposed theories extending the tunneling
approximation towards the multiphoton regime in strong-field ionization of helium. We …

Tunneling delays represent a hotly debated topic, with many conflicting definitions and little
consensus on when and if such definitions accurately describe the physical observables …

We investigate tunneling ionization of a single active electron with a strong and short laser
pulse, circularly polarized. With the recently proposed backpropagation method, we can …

We investigate tunneling ionization of a model helium atom in a strong circularly polarized
short laser pulse using the classical backpropagation method and compare ten different …

We perform time-dependent calculations of strong-field ionization of He by elliptically
polarized light in configuration of recent attoclock measurements of Boge [Phys. Rev. Lett …

The terms adiabatic and nonadiabatic, respectively, are used in many different contexts.
Whereas in classical thermodynamics, adiabatic refers to processes that occur without any …

What is the nature of tunnelling? This yet unanswered question is as pertinent today as it
was at the dawn of quantum mechanics. This article presents a cross section of current …