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Applicant:
Central University of Tamil Nadu 
Author:
Anjali N. Nair and R. Arun 
Corresponding Authors:
R. Arun 
DOI #:
10.1103/PhysRevA.97.036301 
Title:
Comment on “Protecting bipartite entanglement by quantum interferences" 
Journal:
Physical Review A 
Year:
2018 
Volume:
97 
Page:
036301 
Keywords:
bipartite entanglement, quantum interferences, entanglement protection 
Abstract:
In an interesting article [Phys. Rev. A 81, 052341 (2010)], Das and Agarwal have discussed the preservation of bipartite entanglement in three-level atoms employing the coherences induced by spontaneous emission. The authors considered various initially entangled qubits prepared from two V-type three-level atoms and showed that more than 50% of the initial (bipartite) entanglement can be preserved in steady state due to vacuum-induced coherence. In this Comment, we point out that their analytical formulas for the entanglement measure contain errors affecting all the numerical results of that article. We substantiate our claim by giving correct analytical results for the time evolution of the two-atom system. 
Entered by:
R. ARUN on 2020-09-02 
 
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