Collective excitations in a F=2 Bose-Einstein condensate

Abstract

We calculate the collective excitations in a homogeneous F=2 spinor condensate in the absence of the magnetic field and also in a strong magnetic field. Almost all the excitations for a zero magnetic field are found to have either the Bogoliubov form or the free-particle form. We relate our results for a strong magnetic field to the concept of fragmented condensates and note that some observable quantities such as the speed of sound for the cyclic state depend on the relative phase between the spinor amplitudes for the $M=\pm 2,0$ atoms.

6 pages 2 figures

References in corpus (2)

• All Optical Formation of an Atomic Bose-Einstein Condensate
• On the nature of spinor Bose-Einstein condensates in rubidium

Cited by in corpus (9)

• Theory of spin-2 Bose-Einstein condensates: spin-correlations, magnetic response, and excitation spectra
• Bogoliubov Theory and Lee-Huang-Yang Corrections in Spin-1 and Spin-2 Bose-Einstein Condensates in the Presence of the Quadratic Zeeman Effect
• Topological defects in spinor condensates
• Diagnostics for the ground state phase of a spin-2 Bose-Einstein condensate
• Symmetry and inert states of spin Bose Condensates
• Vortex splitting and phase separating instabilities of coreless vortices in F=1 spinor Bose-Einstein condensates
• The structure of the perturbation series of the spin-1 Bose gas at low temperatures
• On microscopic theory of spin-S Bose-Einstein condensate in a magnetic field
• Cyclic phase in F=2 spinor condensate: Long-range order, kinks, and roughening transition