High-order harmonic generation spectrum from two coupled Floquet resonances – a non- Hermitian formulation

Kód výsledku v IS VaVaI

<a href="https://www.isvavai.cz/riv?ss=detail&h=RIV%2F68378271%3A_____%2F19%3A00517442" target="_blank" >RIV/68378271:_____/19:00517442 - isvavai.cz</a>

Výsledek na webu

<a href="https://doi.org/10.1080/00268976.2019.1601788" target="_blank" >https://doi.org/10.1080/00268976.2019.1601788</a>

DOI - Digital Object Identifier

<a href="http://dx.doi.org/10.1080/00268976.2019.1601788" target="_blank" >10.1080/00268976.2019.1601788</a>

Jazyk výsledku

angličtina

Název v původním jazyce

High-order harmonic generation spectrum from two coupled Floquet resonances – a non- Hermitian formulation

Popis výsledku v původním jazyce

The quantity ψ(t − t/2)|ˆa|ψ(t + t/2) given for a square integrable wavefunction ψ allows one to define very different kinds of measurables, such as absorption spectrum (as a Fourier transform (FT) over t for t=0) as well as high-order harmonic generation (HHG) spectrum (as a FT over t for t=0). The main objective of this paper is to define this quantity based on a spectral decomposition of ψ to non-Hermitian wavefunctions obtained in complex scaling calculations. The obtained formal expression combines matrix elements based on the non-Hermitian c-inner product, and surprisingly also Cartesian (Euclidean) norms and overlaps of complex scaled wavefunctions. The exact non-Hermitian formalism is necessary for theoretical calculations of HHG at coupled photoionisation resonances, illustrated here for a multiphoton conversion in helium atom near a conical intersection.n

Název v anglickém jazyce

High-order harmonic generation spectrum from two coupled Floquet resonances – a non- Hermitian formulation

Popis výsledku anglicky

The quantity ψ(t − t/2)|ˆa|ψ(t + t/2) given for a square integrable wavefunction ψ allows one to define very different kinds of measurables, such as absorption spectrum (as a Fourier transform (FT) over t for t=0) as well as high-order harmonic generation (HHG) spectrum (as a FT over t for t=0). The main objective of this paper is to define this quantity based on a spectral decomposition of ψ to non-Hermitian wavefunctions obtained in complex scaling calculations. The obtained formal expression combines matrix elements based on the non-Hermitian c-inner product, and surprisingly also Cartesian (Euclidean) norms and overlaps of complex scaled wavefunctions. The exact non-Hermitian formalism is necessary for theoretical calculations of HHG at coupled photoionisation resonances, illustrated here for a multiphoton conversion in helium atom near a conical intersection.n

Druh

J_imp - Článek v periodiku v databázi Web of Science

CEP obor

—

OECD FORD obor

10306 - Optics (including laser optics and quantum optics)

Projekt

<a href="/cs/project/LTT17015" target="_blank" >LTT17015: Výzkum v rámci Mezinárodního centra hustého magnetizovaného plazmatu</a><br>

Návaznosti

P - Projekt vyzkumu a vyvoje financovany z verejnych zdroju (s odkazem do CEP)

Rok uplatnění

2019

Kód důvěrnosti údajů

S - Úplné a pravdivé údaje o projektu nepodléhají ochraně podle zvláštních právních předpisů

Název periodika

Molecular Physics

ISSN

0026-8976

e-ISSN

—

Svazek periodika

117

Číslo periodika v rámci svazku

15

Stát vydavatele periodika

GB - Spojené království Velké Británie a Severního Irska

Počet stran výsledku

19

Strana od-do

2138-2156

Kód UT WoS článku

000465813300001

EID výsledku v databázi Scopus

2-s2.0-85064072183