scholarly journals Intense laser interacting with a two-level atom: WKB expressions for dipole transitions and population inversion

2002 ◽  
Vol 293 (1-2) ◽  
pp. 1-9
Author(s):  
Juan D Lejarreta ◽  
Jose M Cerveró
Keyword(s):  
Population Inversion ◽  
Intense Laser ◽  
Level Atom

CONTROL OF COLLAPSE-REVIVAL PHENOMENON USING A TIME VARYING SQUEEZED FIELD

2011 ◽  
Vol 20 (02) ◽  
pp. 155-165 ◽  
Author(s):  
K. V. PRIYESH ◽  
RAMESH BABU THAYYULLATHIL
Keyword(s):  
Time Evolution ◽  
Frequency Modulation ◽  
Population Inversion ◽  
Light Field ◽  
Time Varying ◽  
Light Atom ◽  
Squeezed Light ◽  
Level Atom ◽  
Time Varying Frequency ◽  
Atom Interaction

We have investigated the interaction of two level atom with time varying quadrature squeezed light field. Jaynes-Cummings model is used for solving the atom radiation interaction. Time evolution of the system for different squeezing parameter and phase have been studied. There are no well-defined revivals in population inversion when the squeezed phase is π and the squeezing parameter is greater than 0.5. Using a time varying frequency for the light field, it is found that the randomness of the population inversion and the collapse revival phenomena can be controlled. Frequency modulation of the field can thus be used as a tool for manipulating the squeezed light atom interaction.

Population Inversion of a V-type Three-Level Atom due to the Effect of Cavity-Induced Quantum Interference

2000 ◽  
Vol 18 (1) ◽  
pp. 48-50 ◽  
Author(s):  
Li Gao-Xiang ◽  
Peng Jin-Sheng ◽  
Wu Shao-Ping ◽  
Huang Guang-Ming
Keyword(s):  
Quantum Interference ◽  
Population Inversion ◽  
Level Atom

scholarly journals Population inversion in laser-driven N2+

2019 ◽  
Vol 205 ◽  
pp. 07010
Author(s):  
Youyuan Zhang ◽  
Erik Lotstedt ◽  
Kaoru Yamanouchi
Keyword(s):  
Laser Pulse ◽  
Population Inversion ◽  
Floquet Theory ◽  
Intense Laser ◽  
Intense Laser Pulse ◽  
Vibrational Ground State ◽  
Final Population ◽  
Electronically Excited ◽  
X State ◽  
Photon Resonance

The time-dependent population transfer process of N2+ generated in an intense laser pulse has been investigated using the quasi-stationary Floquet theory by assuming that N2+ experiences an intense laser pulse with the sudden turn-on. A light-dressed B state is formed with a significant amount of population when pulse is suddenly turned on and is adiabatically transformed to the vibrational ground state (v = 0) of the field-free B state when the pulse vanishes. In addition, a part of the population is transferred to the electronically excited A state through one-photon resonance, which also contributes to decreasing the final population in the X state, facilitating the population inversion between the B state and the X state.

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