Transition to miscibility in linearly coupled binary dipolar Bose-Einstein condensates

Abstract

We investigate effects of dipole-dipole (DD) interactions on immiscibility-miscibility transitions (IMTs) in two-component Bose-Einstein condensates (BECs) trapped in the harmonic-oscillator (HO) potential, with the components linearly coupled by a resonant electromagnetic field (accordingly, the components represent two different spin states of the same atom). The problem is studied by means of direct numerical simulations. Different mutual orientations of the dipolar moments in the two components are considered. It is shown that, in the binary BEC formed by dipoles with the same orientation and equal magnitudes, the IMT cannot be induced by the DD interaction alone, being possible only in the presence of the linear coupling between the components, while the miscibility threshold is affected by the DD interactions. However, in the binary condensate with the two dipolar components polarized in opposite directions, the IMT can be induced \emph{without} any linear coupling. Further, we demonstrate that those miscible and immiscible localized states, formed in the presence of the DD interactions, which are unstable evolve into robust breathers, which tend to keep the original miscibility or immiscibility, respectively. An exception is the case of a very strong DD attraction, when narrow stationary modes are destroyed by the instability. The binary BEC composed of co-polarized dipoles with different magnitudes are briefly considered too.

10 figures

References in corpus (11)

• The physics of dipolar bosonic quantum gases
• Tuning the scattering length with an optically induced Feshbach resonance
• Strong dipolar effects in a quantum ferrofluid
• Stabilizing a purely dipolar quantum gas against collapse
• d-wave collapse and explosion of a dipolar Bose-Einstein condensate
• Ultracold heteronuclear molecules in a 3D optical lattice
• Dipolar gases in quasi one-dimensional geometries
• Spin gradient thermometry for ultracold atoms in optical lattices
• Solitons in quasi one-dimensional Bose-Einstein condensates with competing dipolar and local interactions
• Phase Separation and Dynamics of Two-component Bose-Einstein Condensates
• Soliton stability and collapse in the discrete nonpolynomial Schrodinger equation with dipole-dipole interactions

Cited by in corpus (26)

• Dipolar Quantum Mixtures of Erbium and Dysprosium Atoms
• Roton immiscibility in a two-component dipolar Bose gas
• Faraday waves in binary non-miscible Bose-Einstein condensates
• Feshbach Resonances in an Erbium-Dysprosium Dipolar Mixture
• Domain walls and vortices in linearly coupled systems
• Fluctuations and quantum self-bound droplets in a dipolar Bose-Bose mixture
• Stable periodic density waves in dipolar Bose-Einstein condensates trapped in optical lattices
• Structure of two-component Bose-Einstein condensates with respective vortex-antivortex superposition states
• Composite localized modes in discretized spin-orbit-coupled Bose-Einstein condensates
• Mixing, demixing, and structure formation in a binary dipolar Bose-Einstein condensate
• Miscibility in coupled dipolar and non-dipolar Bose-Einstein condensates
• Causality and defect formation in the dynamics of an engineered quantum phase transition in a coupled binary Bose-Einstein condensate
• Lattice solitons with quadrupolar intersite interactions
• Quasi-one-dimensional spin-orbit- and Rabi-coupled bright dipolar Bose-Einstein-condensate solitons
• Phase separation of a two-component dipolar Bose-Einstein condensate in the quasi-one-dimensional and quasi-two-dimensional regime
• Beyond mean-field properties of binary dipolar Bose mixtures at low temperatures
• Miscibility and stability of dipolar bosonic mixtures
• Domain walls and bubble-droplets in immiscible binary Bose gases
• A robust and efficient numerical method to compute the dynamics of the rotating two-component dipolar Bose-Einstein condensates
• Statistics of Vector Manakov Rogue Waves
• Biased dynamics of the miscible-immiscible quantum phase transition in a binary Bose-Einstein condensate
• Binary Mixture of quasi one dimensional dipolar Bose Einstein Condensates with tilted dipoles
• Interfaces between Bose-Einstein and Tonks-Girardeau atomic gases
• Rabi-induced localization and resonant delocalization of a binary condensate in a spin-asymmetric quasiperiodic potential
• Long lifetime supersolid in a two-component dipolar Bose-Einstein condensate
• Quasiparticle spectra of mixtures of dipolar and non-dipolar condensates at zero and finite temperatures