Roy, ArkoArkoRoyAngom, D.D.Angom2025-09-042025-09-042014-07-0110.1103/PhysRevA.90.023612https://d8.irins.org/handle/IITG2025/30103We show that the presence of soliton in a single-species condensate, at zero temperature, enhances the quantum depletion sufficient enough to induce dynamical instability of the system. We also predict that for two-species condensates, two Goldstone modes emerge in the excitation spectrum at phase separation. Of these, one is due to the presence of the soliton. We use Hartree-Fock-Bogoliubov theory with Popov approximation to examine the mode evolution, and demonstrate that when the anomalous mode collides with a higher energy mode it renders the solitonic state oscillatory unstable. We also report soliton induced change in the topology of the density profiles of the two-species condensates at phase-separation.en-USGoldstoneHartree-Fock-Bogoliubov theoryQuantum GasesSolitonArticlehttps://arxiv.org/pdf/1405.6459Article14123456789/615