The effect of laser field intensity on polarizability in a quantum well

2010 ◽  
Vol 374 (21) ◽  
pp. 2170-2174 ◽  
Author(s):  
A. John Peter
Keyword(s):  
Quantum Well ◽  
Field Intensity ◽  
Laser Field

The effects of the intense laser field on bound states in Ga x In1- x N y As1- y N/GaAs single quantum well

2011 ◽  
Vol 80 (1) ◽  
pp. 89-93 ◽  
Author(s):  
F. Ungan ◽  
E. Kasapoglu ◽  
C. A. Duque ◽  
U. Yesilgul ◽  
S. Şakiroglu ◽  
...  
Keyword(s):  
Quantum Well ◽  
Laser Field ◽  
Bound States ◽  
Intense Laser ◽  
Single Quantum ◽  
Intense Laser Field ◽  
Single Quantum Well

Steady-state correlations of two atoms interacting with a reservoir

2012 ◽  
Vol 12 (3&4) ◽  
pp. 231-252
Author(s):  
Luis Octavio Castanos
Keyword(s):  
Electromagnetic Field ◽  
Steady State ◽  
Master Equation ◽  
Field Intensity ◽  
Mixed State ◽  
Laser Field ◽  
Quantum Discord ◽  
Energy Levels ◽  
High Laser ◽  
X State

We consider two two-level atoms fixed at different positions, driven by a resonant monochromatic laser field, and interacting collectively with the quantum electromagnetic field. A Born-Markov-secular master equation is used to describe the dynamics of the two atoms and the steady-state is obtained analytically for a configuration of the atoms. The steady-state populations of the energy levels of the free atoms, entanglement, quantum and geometric discords and degree of mixedness are calculated analytically as a function of the laser field intensity and the distance between the two atoms. It is found that there is a possibility of considerable steady-state entanglement and left/right quantum discord and that these can be controlled either by increasing/decreasing the intensity of the laser field or by increasing/decreasing the distance between atoms. It is shown that the system of two atoms can be prepared in a separable mixed state with non-zero quantum discord that turns into an $X$-state for high laser field intensities. The behavior and relationships between the different correlations are studied and several limiting cases are investigated.

scholarly journals TRANSIENT AND STEADY-STATE ABSORPTIONS OF A WEAK PROBE FIELD IN A COUPLED DOUBLE QUANTUM-WELL STRUCTURE

2009 ◽  
Vol 23 (18) ◽  
pp. 2215-2227 ◽  
Author(s):  
WEN-XING YANG ◽  
JIN XU ◽  
RAY-KUANG LEE
Keyword(s):  
Steady State ◽  
Quantum Well ◽  
Laser Field ◽  
Probe Laser ◽  
Double Quantum ◽  
Probe Field ◽  
Two Photon ◽  
State Process ◽  
Double Quantum Well ◽  
Efficient Scheme

We propose and analyze an efficient scheme for suppressing the absorption of a weak probe field based on intersubband transitions in a four-level asymmetric coupled quantum well (CQW) driven coherently by a probe laser field and a control laser field. We study the steady-state process analytically and numerically, and our results show that the probe absorption can be completely eliminated under the condition of Raman resonance (i.e. two-photon detuning is zero). Besides, we can observe one transparency window without requiring one- or two-photon detuning to exactly vanish. This investigation may provide a possible scheme for EIT in solids by using the CQW.

Effect of Intense Laser Field in GaAs/AlxGa1−xAs Quantum Well

2014 ◽  
Vol 20 (3) ◽  
pp. 726-728 ◽  
Author(s):  
B. Pradhan ◽  
B. K. Panda
Keyword(s):  
Quantum Well ◽  
Laser Field ◽  
Intense Laser ◽  
Intense Laser Field
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