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

Spontaneous emission inhibition from a driven four-level atom in a photonic band gap material

2007 ◽  
Vol 85 (9) ◽  
pp. 981-994
Author(s):  
H Zhang ◽  
G Q Liu ◽  
H Z Zhang
Keyword(s):  
Band Gap ◽  
Spontaneous Emission ◽  
Quantum Interference ◽  
Photonic Band Gap ◽  
Coupling Model ◽  
Interference Effects ◽  
Level Atom ◽  
Photonic Band Gap Material ◽  
First Time ◽  
Photonic Band

Two models (an upper levels coupling model and a lower levels coupling model) of a four-level atom embedded in a double-band photonic crystal are adopted. The effect of spontaneous emission cancellation of such systems embedded in different reservoirs are investigated. Especially, the "trapping conditions" of such systems in photonic band gap (PBG) reservoirs are discussed for the first time. We also investigate the different quantum interference effects of the lower levels coupling model embedded in an isotropic PBG reservoir. It is interesting that when the trapping conditions are fulfilled, the additional peaks, which result from the contribution of the additional singularities of Laplace transform of the delayed Green function of the isotropic PBG modes, are eliminated.PACS Nos.: 42.50.Gy, 42.50.Ct, 42.70.Qs

Effect of quantum interference on a three-level atom driven by two laser fields

2001 ◽  
Vol 48 (6) ◽  
pp. 1059-1084 ◽  
Author(s):  
Uzma Akram ◽  
Z. Ficek ◽  
S. Swain
Keyword(s):  
Quantum Interference ◽  
Laser Fields ◽  
Level Atom

FIELD-INDUCED QUANTUM INTERFERENCE IN SEMICONDUCTOR QUANTUM WELLS FOR LASING WITHOUT POPULATION INVERSION AND ELECTROMAGNETICALLY INDUCED TRANSPARENCY

1995 ◽  
Vol 04 (02) ◽  
pp. 261-282 ◽  
Author(s):  
Y. ZHAO ◽  
D. HUANG ◽  
C. WU
Keyword(s):  
Quantum Wells ◽  
Quantum Interference ◽  
Population Inversion ◽  
Electromagnetically Induced Transparency ◽  
Random Phase ◽  
Nonlinear Susceptibility ◽  
Double Quantum ◽  
Single Quantum Well ◽  
Semiconductor Quantum Wells ◽  
Induced Transparency

This paper presents the current results of field-induced quantum interference in semiconductor quantum wells. Three-level systems with two conduction subbands in single and double quantum wells coupled by a resonant field are studied. We investigate effects of the Coulomb and field-induced electronic renormalizations of the energy subbands and steady eigenstates of electrons. The random-phase and ladder approximations have been used to calculate the linear interband and intersubband optical absorptions and refractive indices. The effect of collective dipole moment on the nonlinear susceptibility has been incorporated into the study by using a local-field approach. Lasing without population inversion, electromagnetically induced transparency, and enhanced nonlinearity with reduced absorption inside the intersubband-coupled single quantum well and dc-field coupled double quantum wells are found.

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.

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