scholarly journals Numerical Investigation of the Geometric Phase and Entropy Squeezing for a Two-Level System in the Presence of Decoherence Terms

2013 ◽  
Vol 05 (09) ◽  
pp. 359-365
Author(s):  
Moustafa M. Salama ◽  
Ahmed O. Elnubi ◽  
Sayed Abdel-Khalek ◽  
Mohamed A. El-Sayed
Keyword(s):  
Numerical Investigation ◽  
Geometric Phase ◽  
Level System ◽  
Entropy Squeezing

scholarly journals ENVIRONMENTALLY INDUCED CORRECTIONS TO THE GEOMETRIC PHASE IN A TWO-LEVEL SYSTEM

2008 ◽  
Vol 06 (supp01) ◽  
pp. 707-713 ◽  
Author(s):  
FERNANDO C. LOMBARDO ◽  
PAULA I. VILLAR
Keyword(s):  
Geometric Phase ◽  
Open Systems ◽  
Level System ◽  
Spin Models ◽  
Decoherence Rate

We calculate the geometric phase for different open systems (spin-boson and spin-spin models). We study not only how they are corrected by the presence of the different type of environments but also discuss the appearence of decoherence effects. These should be taken into account when planning experimental setups to study the geometric phase in the nonunitary regime. We propose a model with slow decoherence rate in which the geometric phase is still modified and might be measured.

Geometric phase in open two-level system

2006 ◽  
Vol 74 (6) ◽  
pp. 958-964 ◽  
Author(s):  
Z. S Wang ◽  
L. C Kwek ◽  
C. H Lai ◽  
C. H Oh
Keyword(s):  
Geometric Phase ◽  
Level System

INFORMATION ENTROPY AND SPIN-SQUEEZING IN ATOMIC THREE-LEVEL SYSTEMS

2013 ◽  
Vol 27 (22) ◽  
pp. 1350117 ◽  
Author(s):  
M. REBOIRO ◽  
O. CIVITARESE ◽  
D. TIELAS
Keyword(s):  
Coherent State ◽  
Time Dependence ◽  
Time Evolution ◽  
Information Entropy ◽  
Spin Squeezing ◽  
Atomic State ◽  
Level System ◽  
Similar Time ◽  
Entropy Squeezing ◽  
Atomic Spin

We consider the problem of an atomic three-level system in interaction with a radiation field. The time evolution of the system, in atomic ladder and Λ configurations, is solved exactly assuming a coherent-state as the initial atomic state. We calculate the atomic spin-squeezing, the atomic entropy-squeezing, and their variances. We show that the spin-squeezing and the entropy-squeezing exhibit similar time dependence.

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