We show that the theoretical expressions presented in Khusnutdinoff et al. [Phys. Rev. B 101, 214312 (2020)] for the longitudinal current spectral function C-l(k, omega) and the dispersion of collective excitations are not correct. Indeed, they are not compatible with the continuum limit and C-L (k, omega -> 0) contradicts the continuity equation.
Comment on ???Collective modes and gapped momentum states in liquid Ga: Experiment, theory, and simulation??? / Bryk, Taras; Mryglod, Ihor; Ruocco, Giancarlo. - In: PHYSICAL REVIEW. B. - ISSN 2469-9950. - 103:9(2021). [10.1103/physrevb.103.096301]
Comment on ???Collective modes and gapped momentum states in liquid Ga: Experiment, theory, and simulation???
Taras Bryk;Giancarlo Ruocco
2021
Abstract
We show that the theoretical expressions presented in Khusnutdinoff et al. [Phys. Rev. B 101, 214312 (2020)] for the longitudinal current spectral function C-l(k, omega) and the dispersion of collective excitations are not correct. Indeed, they are not compatible with the continuum limit and C-L (k, omega -> 0) contradicts the continuity equation.File allegati a questo prodotto
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