Year: 2024
Type: article
Abstract: We investigate the breathing mode and the stability of a quantum droplet in a tightly trapped one-dimensional dipolar gas of bosonic atoms. When the droplet with a flat-top density profile is formed, the breathing-mode frequency scales as the inverse of the number of atoms in the cloud. This is straightforwardly derived within a phenomenological hydrodynamical approach and confirmed using both a variational method based on a generalized Gross-Pitaevskii action functional and the sum-rule approach. We extend our analysis also to the presence of axial confinement showing the effect of the trap on the density profile and therefore on the breathing-mode frequency scaling. Our analysis confirms the stability of the quantum droplet against the particle emission when the flat-top density profile is observed. Our results can be used as a guide to the experimental investigations of collective modes to detect the formation of quantum droplets in quasi-one-dimensional dipolar gases.
Source: Physical Review A
Authors: E. Orignac, S. De Palo, L. Salasnich, R. Citro
Institutions: Centre National de la Recherche Scientifique, Laboratoire de Physique de l'ENS de Lyon, University of Trieste, Istituto Officina dei Materiali, University of Padua, Istituto Nazionale di Fisica Nucleare, Sezione di Padova, National Institute of Optics, University of Salerno, Istituto Nazionale di Fisica Nucleare, Gruppo Collegato di Salerno
Language: English
Subfield: Atomic and Molecular Physics, and Optics
Field: Physics and Astronomy
Domain: Physical Sciences
Open Access status: green
OpenAlex ID: W4394843549