This article is cited in 38 papers

REVIEWS OF TOPICAL PROBLEMS

Keldysh photoionization theory: through the barriers

A. M. Zheltikov<sup>abcdef

a</sup> Lomonosov Moscow State University, Faculty of Physics
^b Texas A&M University, Department of Physics and Astronomy
^c Lomonosov Moscow State University, International Laser Center
^d International Center for Quantum Optics and Quantum Technologies (Russian Quantum Center), Skolkovo, Moscow
^e National Research Centre "Kurchatov Institute", Moscow
^f Kazan Quantum Center, Kazan National Research Technical University named after A. N. Tupolev

Abstract: The Keldysh photoionization theory is a conceptual cornerstone and a universal framework for the description of a broad class of fundamental effects in light–matter interaction. Here, we provide an overview of the Keldysh theory as a significant milestone in the development of modern optical physics and offer a historical perspective on the fundamental role of this theory, from the early pioneering work on quantum tunneling to the latest breakthroughs in laser optics, attosecond technologies, and ultrafast optics of high-intensity laser pulses.

Keywords: Keldysh theory of photoionization, light–matter interaction, ultrafast optics.

PACS: 32.80.-t, 42.50.-p, 42.65.-k, 78.20.-e

Received: June 15, 2017
Revised: August 8, 2017
Accepted: August 16, 2017

DOI: 10.3367/UFNr.2017.08.038198

 English version: Physics–Uspekhi, 2017, 60:11, 1087–1120

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