quantum coherence and interference
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1997 ◽  
Vol 06 (02) ◽  
pp. 119-139
Author(s):  
Danhong Huang ◽  
Yang Zhao ◽  
Eddie Awad

New results of quantum coherence and interference effects in linear and nonlinear optical responses in double quantum wells are presented. Three-subband model in which two upper tunneling-split subbands are coupled by a dc-field is studied. We show the importance of the dc-field in establishing the quantum coherence and interference which introduces into the lasing without inversion and enhances the optical nonlinearity in the system. The optimal threshold dc-field can achieve as low as 4 kV/cm in our model. The Coulomb renormalization of electron kinetic energy is included. The many-body theory is employed to calculate both the linear and nonlinear optical responses.


1997 ◽  
Vol 52 (1-2) ◽  
pp. 114-116
Author(s):  
C.H. Keitel ◽  
H . M . Doss ◽  
M. Fleischhauer ◽  
L.M. Narducci ◽  
M.O. Scully ◽  
...  

Abstract We investigate the advantageous description of driven multi-level systems in the dressed state representation. A demonstration is given for the cases of subnatural line narrowing and lasing without inversion.


1993 ◽  
Vol 47 (6) ◽  
pp. 4994-5002 ◽  
Author(s):  
U. Rathe ◽  
M. Fleischhauer ◽  
Shi-Yao Zhu ◽  
T. W. Hänsch ◽  
M. O. Scully

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