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

Result code in 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>
Alternative codes found
RIV/61388955:_____/14:00434945
Result on the web
<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>

Result language
angličtina
Original language name
Helium in chirped laser fields as a time-asymmetric atomic switch
Original language description
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
Czech name
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Czech description
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Type
J<sub>x</sub> - Unclassified - Peer-reviewed scientific article (Jimp, Jsc and Jost)
CEP classification
BG - Nuclear, atomic and molecular physics, accelerators
OECD FORD branch
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Project
<a href="/en/project/GAP205%2F11%2F0571" target="_blank" >GAP205/11/0571: Ionization and excitation of atomic and molecular gases exposed to intense extreme ultraviolet radiation: theory and experiment</a><br>
Continuities
I - Institucionalni podpora na dlouhodoby koncepcni rozvoj vyzkumne organizace

Publication year
2014
Confidentiality
S - Úplné a pravdivé údaje o projektu nepodléhají ochraně podle zvláštních právních předpisů

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