For over a century since the Nobel prize winning work by Einstein (1905 Ann. Phys. 17 132),
atomic photoionization was thought to be an instantaneous process. Recent experimental …

Electronic processes within atoms and molecules reside on the timescale of attoseconds.
Recent advances in the laser-based pump-probe interrogation techniques have made …

The perceived dichotomy between analytical and ab initio approaches to theory in
attosecond science is often seen as a source of tension and misconceptions. This Topical …

The concept of Wigner time delay was introduced in scattering theory to quantify the delay or
advance of an incoming particle in its interaction with the scattering potential. The scattered …

Exploiting the infinite-order continuous dynamical rotational symmetry of circularly or
elliptically polarized classical light pulses, we establish the conservation law between the …

The interference of matter waves is one of the intriguing features of quantum mechanics that
has impressed researchers and laymen since it was first suggested almost a century ago …

We establish an energy conservation law for tunneling electrons driven by a circularly
polarized light in a rotationally invariant potential. This conservation law emerges from the …

The time delay in strong field tunneling ionization presents a captivating challenge in the
field of attoscience. It is linked to the phase of the photoelectron wavepacket, a relationship …

To investigate high-order harmonic generation in a monochromatic laser field, we derive an
analytical expression for the return energy of an electron as a function of the time interval …

Resonances leave prominent signatures in atomic and molecular ionization triggered by the
absorption of single or multiple photons. These signatures reveal various aspects of the …