The attoclock and the tunnelling time debate

TL;DR

The paper reviews recent experimental and theoretical research on the attoclock technique, providing evidence that suggests tunneling electron time during ionization is effectively zero, thus contributing to the ongoing tunneling time debate.

Contribution

It offers a comprehensive review and synthesis of the latest findings, supporting the zero tunneling time hypothesis in the attoclock context.

Findings

Evidence supports zero tunneling time scenario.

Experimental results align with theoretical predictions.

The review clarifies the current state of tunneling time debate.

Abstract

Attosecond angular streaking, also known as the "attoclock", employs a short elliptically polarized laser pulse to tunnel ionize an electron from an atom or a molecule and to put a time stamp on this process by deflecting the photoelectron in the angular spatial direction. This deflection can be used to evaluate the time the tunneling electron spends under the classically inaccessible barrier and to determine whether this time is finite. In this review, we examine the latest experimental and theoretical findings and present a comprehensive set of evidence supporting the zero tunneling time scenario.