Entanglement of Photon-Added Nonlinear Coherent States Via a Beam Splitter

Comment on 'Entanglement of photon-added nonlinear coherent states via beam splitter'

“…Here we argue that the results presented by the plots of Mandel parameter and linear entropy concerning Panson-Solomon coherent states (displayed by Figures (3) and (1) of [1]) are not correct and lead to wrong conclusions. In order to discuss the above mentioned results of [1], we rewrite the expressions involved in the computation of linear entropy and Mandel parameter. The general form of photon-added nonlinear coherent states (introduced in Eq.…”

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Beam splitter mediated entanglement of nonlinear photon-added coherent states was studied by Honarasa, Bagheri and Gharaati [1]. We believe that this work contains errors in numerical computations of linear entropy and Mandel parameter which lead to wrong conclusions.

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“…Entanglement is regarded as a key resource for quantum information processing and therefore, the generation of entangled states received a lot of attention. Recently, Honarasa, Bagheri and Gharaati [1] investigated the entanglement generation at output modes of a beam splitter with a nonlinear photon-added coherent state and a vacuum state injected at the inputs.…”

“…Earlier, it has been pointed out that beam splitter mediated entanglement generation requires at least one input mode as nonclassical state [2]. In [1], the nonclassical character of the nonlinear photon-added coherent states, as an input state of the beam splitter, was analyzed by Mandel parameter (sub-Poissonian statics: an indicator of nonclassicality) and the entanglement generation at output states was quantified by linear entropy. Here we argue that the results presented by the plots of Mandel parameter and linear entropy concerning Panson-Solomon coherent states (displayed by Figures (3) and (1) of [1]) are not correct and lead to wrong conclusions.…”

“…In [1], the nonclassical character of the nonlinear photon-added coherent states, as an input state of the beam splitter, was analyzed by Mandel parameter (sub-Poissonian statics: an indicator of nonclassicality) and the entanglement generation at output states was quantified by linear entropy. Here we argue that the results presented by the plots of Mandel parameter and linear entropy concerning Panson-Solomon coherent states (displayed by Figures (3) and (1) of [1]) are not correct and lead to wrong conclusions. In order to discuss the above mentioned results of [1], we rewrite the expressions involved in the computation of linear entropy and Mandel parameter.…”