Helium in chirped laser fields as a time-asymmetric atomic switch

Kód výsledku v IS VaVaI

<a href="https://www.isvavai.cz/riv?ss=detail&h=RIV%2F68378271%3A_____%2F14%3A00439805" target="_blank" >RIV/68378271:_____/14:00439805 - isvavai.cz</a>

Nalezeny alternativní kódy

RIV/61388955:_____/14:00434945

Výsledek na webu

<a href="http://dx.doi.org/10.1063/1.4885136" target="_blank" >http://dx.doi.org/10.1063/1.4885136</a>

DOI - Digital Object Identifier

<a href="http://dx.doi.org/10.1063/1.4885136" target="_blank" >10.1063/1.4885136</a>

Jazyk výsledku

angličtina

Název v původním jazyce

Helium in chirped laser fields as a time-asymmetric atomic switch

Popis výsledku v původním jazyce

Tuning the laser parameters exceptional points in the spectrum of the dressed laser helium atom are obtained. The weak linearly polarized laser couples the ground state and the doubly excited P-states of helium. We show that for specific chirped laser pulses that encircle an exceptional point one can get the time-asymmetric phenomenon, where for a negative chirped laser pulse the ground state is transformed into the doubly excited auto-ionization state, while for a positive chirped laser pulse the resonance state is not populated and the neutral helium atoms remains in the ground state as the laser pulse is turned off. Moreover, we show that the results are very sensitive to the closed contour we choose. This time-asymmetric state exchange phenomenon can be considered as a time-asymmetric atomic switch. The optimal time-asymmetric switch is obtained when the closed loop that encircles the exceptional point is large, while for the smallest loops, the time-asymmetric phenomenon does not

Název v anglickém jazyce

Helium in chirped laser fields as a time-asymmetric atomic switch

Popis výsledku anglicky

Tuning the laser parameters exceptional points in the spectrum of the dressed laser helium atom are obtained. The weak linearly polarized laser couples the ground state and the doubly excited P-states of helium. We show that for specific chirped laser pulses that encircle an exceptional point one can get the time-asymmetric phenomenon, where for a negative chirped laser pulse the ground state is transformed into the doubly excited auto-ionization state, while for a positive chirped laser pulse the resonance state is not populated and the neutral helium atoms remains in the ground state as the laser pulse is turned off. Moreover, we show that the results are very sensitive to the closed contour we choose. This time-asymmetric state exchange phenomenon can be considered as a time-asymmetric atomic switch. The optimal time-asymmetric switch is obtained when the closed loop that encircles the exceptional point is large, while for the smallest loops, the time-asymmetric phenomenon does not

Druh

J_x - Nezařazeno - Článek v odborném periodiku (Jimp, Jsc a Jost)

CEP obor

BG - Jaderná, atomová a molekulová fyzika, urychlovače

OECD FORD obor

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Projekt

<a href="/cs/project/GAP205%2F11%2F0571" target="_blank" >GAP205/11/0571: Ionizace a excitace v atomárních a molekulárních plynech vystavených působení intenzivního extrémního ultrafialového záření: teorie a experiment</a><br>

Návaznosti

I - Institucionalni podpora na dlouhodoby koncepcni rozvoj vyzkumne organizace

Rok uplatnění

2014

Kód důvěrnosti údajů

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

Název periodika

Journal of Chemical Physics

ISSN

0021-9606

e-ISSN

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Svazek periodika

141

Číslo periodika v rámci svazku

1

Stát vydavatele periodika

US - Spojené státy americké

Počet stran výsledku

14

Strana od-do

"014307-1"-"014307-14"

Kód UT WoS článku

000339622000019

EID výsledku v databázi Scopus

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