Supersolidity of dipolar Bose-Einstein condensates induced by coupling to fermions
arXiv:2401.05890 · doi:10.1103/PhysRevA.111.L011301
Abstract
We study a mixture of a repulsive dipolar condensate and a degenerate Fermi gas in a quasi-one-dimensional geometry. We demonstrate that the presence of fermions, which attract bosons, drastically changes the behavior of the dipolar condensate. For strong enough boson-fermion attraction, a dipolar Bose-Fermi droplet appears in the mixture, and as the attraction becomes stronger, a roton excitation develops in the Bogoliubov spectrum, leading to the formation of a supersolid, and eventually a crystal of isolated droplets. We describe the system by coupled extended Gross-Pitaevskii (bosons) and Hartree-Fock (fermions) equations. We study the excitation spectrum of the system and identify a number of Goldstone and Higgs modes in the supersolid regime.
10 pages, 11 figures
References in corpus (15)
- Observation of the supersolid stripe phase in spin-orbit coupled Bose-Einstein condensates
- Supersolid formation in a quantum gas breaking continuous translational symmetry
- Transient supersolid properties in an array of dipolar quantum droplets
- Long-lived and transient supersolid behaviors in dipolar quantum gases
- Dipolar physics: A review of experiments with magnetic quantum gases
- Dipolar gases in quasi one-dimensional geometries
- Soliton trains in Bose-Fermi mixtures
- Instabilities and the roton spectrum of a quasi-1D Bose-Einstein condensed gas with dipole-dipole interactions
- Alternating-domain supersolids in binary dipolar condensates
- Catalyzation of supersolidity in binary dipolar condensates
- Excitations of a binary dipolar supersolid
- Self-Pinning Transition of a Tonks-Girardeau Gas in a Bose-Einstein Condensate
- Zero-energy modes of two-component Bose-Bose droplets
- Manifestation of relative phase in dynamics of two interacting Bose-Bose droplets
- Phases and dynamics of few fermionic impurities immersed in two-dimensional boson droplets