Evolution of Goldstone mode in binary condensate mixtures

Abstract

We show that the third Goldstone mode in the two-species condensate mixtures, which emerges at phase-separation, gets hardened when the confining potentials have separated trap centers. The {\em sandwich} type condensate density profiles, in this case, acquire a {\em side-by-side} density profile configuration. We use Hartree-Fock-Bogoliubov theory with Popov approximation to examine the mode evolution and density profiles for these phase transitions at $T=0$.

arXiv comment5 pages, 2 figures. Some part of the theory is common to arXiv:1307.5716 and arXiv:1405:6459, so that the article is self-contained for the benefit of the readers

References in corpus (17)

• Optical Confinement of a Bose-Einstein Condensate
• Collective excitations of a trapped Bose-condensed gas
• Conserving and Gapless Approximations for an Inhomogeneous Bose Gas at Finite Temperatures
• Dual-Species Bose-Einstein Condensate of ${}^{87}$Rb and ${}^{133}$Cs
• Controlling phase separation of binary Bose-Einstein condensates via mixed-spin-channel Feshbach resonance
• Quantum degenerate mixtures of strontium and rubidium atoms
• Rayleigh-Taylor instability and mushroom-pattern formation in a two-component Bose-Einstein condensate
• Rayleigh-Taylor instability of binary condensates
• Observation of Feshbach resonances between ultracold Na and Rb atoms
• Ground State Geometry of Binary Condensates in Axisymmetric Traps
• Goldstone modes and bifurcations in phase-separated binary condensates at finite temperature
• Nambu-Goldstone modes in segregated Bose-Einstein condensates
• Excitations of a trapped two component Bose Einstein Condensate
• Dispersion relation and excitation character of a two-component Bose-Einstein condensate
• Coreless vortex dipoles and bubbles in phase-separated binary condensates
• Phase separation of binary condensates in harmonic and lattice potentials
• Fluctuation and interaction induced instability of dark solitons in single and binary condensates

Cited by in corpus (5)

• Segregated quantum phases of dipolar bosonic mixtures in two-dimensional optical lattices
• Interfacial tension and wall energy of a Bose-Einstein condensate binary mixture: triple-parabola approximation
• Collective modes in multicomponent condensates with anisotropy
• Bifurcations, stability, and mode evolution in segregated condensate mixtures
• Geometry-induced modification of fluctuation spectrum in quasi-two-dimensional condensates