Spectrum and quench-induced dynamics of spin-orbit coupled quantum droplets

We investigate the ground state and dynamics of one-dimensional spin-orbit coupled (SOC) quantum droplets within the extended Gross-Pitaevskii approach. Stripe droplet patterns emerge for increasing SOC wavenumber possessing a flat-top background for larger particle number. The surface energy featur...

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Bibliographic Details
Published inarXiv.org
Main Authors Gangwar, Sonali, Rajamanickam Ravisankar, Mistakidis, S I, Muruganandam, Paulsamy, Mishra, Pankaj Kumar
Format Paper
LanguageEnglish
Published Ithaca Cornell University Library, arXiv.org 31.07.2023
Subjects
Droplets
Dynamic stability
Excitation spectra
Orbital mechanics
Particle decay
Rotons
Spatial distribution
Spin dynamics
Surface energy
Wavelengths
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Summary:We investigate the ground state and dynamics of one-dimensional spin-orbit coupled (SOC) quantum droplets within the extended Gross-Pitaevskii approach. Stripe droplet patterns emerge for increasing SOC wavenumber possessing a flat-top background for larger particle number. The surface energy features a power-law decay with respect to interactions. At small SOC wavenumbers, a transition from Gaussian to flat-top droplets occurs for either larger atom number or reduced intercomponent attraction. The excitation spectrum demonstrates, for instance, droplet stability and an admixture of phonons and rotons at large atom numbers and SOC wavenumbers. Unstable parametric regions are attributed to the interplay of SOC and Lee-Huang-Yang energy contributions. Rich droplet dynamical features are found using velocity imprinting, and abrupt changes on the intercomponent interaction or the SOC parameters. Characteristic type of responses include, breathing oscillations, expansion, symmetric and asymmetric droplet fragmentation, admixtures of single and stripe droplet branches as well as erratic spatial distributions suggesting the triggering of relevant instabilities. Our results unveil the controlled dynamical generation and stability of stripe droplets that should be detectable in current cold-atom experiments.
ISSN:2331-8422