Further testing the validity of generalized heterogeneous-elasticity theory for low-frequency excitations in structural glasses

We summarize the salient features of our theory of nonphononic vibrational excitations in glasses [W. Schirmacher et al., Nat. Commun. 15, 3107 (2024)10.1038/s41467-024-46981-7]. Next, we provide further evidence of the nonuniversality of the ω^{4} scaling of the nonphononic vibrational density of states (DoS), and the existence of an important class of nonphononic excitations in glasses, which we call defect states. These modes are induced by frozen-in stresses and can be classified as quasilocalized. Our results suggest that the commonly observed low-frequency ω^{4} scaling of the nonphononic vibrational density of states is highly dependent on the technical aspects of the molecular dynamics simulations employed to compute the DoS.