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Statements

Subject Item
n2:RIV%2F61388955%3A_____%2F14%3A00434945%21RIV15-GA0-61388955
rdf:type
n6:Vysledek skos:Concept
dcterms: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 here 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 take place. A systematic way for studying the effect of the chosen closed contour that encircles the exceptional point on the time-asymmetric phenomenon is proposed. (C) 2014 AIP Publishing LLC. 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 here 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 take place. A systematic way for studying the effect of the chosen closed contour that encircles the exceptional point on the time-asymmetric phenomenon is proposed. (C) 2014 AIP Publishing LLC.
dcterms:title
Helium in chirped laser fields as a time-asymmetric atomic switch Helium in chirped laser fields as a time-asymmetric atomic switch
skos:prefLabel
Helium in chirped laser fields as a time-asymmetric atomic switch Helium in chirped laser fields as a time-asymmetric atomic switch
skos:notation
RIV/61388955:_____/14:00434945!RIV15-GA0-61388955
n3:aktivita
n17:I n17:P
n3:aktivity
I, P(GAP205/11/0571)
n3:cisloPeriodika
1
n3:dodaniDat
n4:2015
n3:domaciTvurceVysledku
n9:4619242
n3:druhVysledku
n14:J
n3:duvernostUdaju
n11:S
n3:entitaPredkladatele
n10:predkladatel
n3:idSjednocenehoVysledku
18920
n3:idVysledku
RIV/61388955:_____/14:00434945
n3:jazykVysledku
n18:eng
n3:klicovaSlova
Atom lasers; Laser pulses; Helium
n3:klicoveSlovo
n7:Atom%20lasers n7:Laser%20pulses n7:Helium
n3:kodStatuVydavatele
US - Spojené státy americké
n3:kontrolniKodProRIV
[B4AFAB11754B]
n3:nazevZdroje
Journal of Chemical Physics
n3:obor
n12:CF
n3:pocetDomacichTvurcuVysledku
1
n3:pocetTvurcuVysledku
2
n3:projekt
n15:GAP205%2F11%2F0571
n3:rokUplatneniVysledku
n4:2014
n3:svazekPeriodika
141
n3:tvurceVysledku
Kaprálová-Žďánská, Petra Ruth Moiseyev, N.
n3:wos
000339622000019
s:issn
0021-9606
s:numberOfPages
14
n8:doi
10.1063/1.4885136