Abstract
Recently, Kumar et al. [APL 104, 262905 (2014)] have reported quantum paraelectric glass state in SrCu3Ti4O12. Their analysis is based on the misconception about the effect of quantum fluctuations on paraelectric properties. There are very serious issues with their analysis of permittivity vs T data where authors tried to prove the presence of quantum paraelectricity in SrCu3Ti4O12. In the comment we have clearly affirm that the analysis presented by the authors do not prove the presence of quantum paraelectric behavior and there by the quantum paraelectric glass state. The quantum fluctuations and the frequency dependence of permittivity, showing relaxor like behavior cannot exist simultaneously.
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