2001/06/30 by J. -P. Martikainen, J-P Martikainen, K. -A. Suominen +1
Physics and Astronomy · #Amplitude #Cold Atom Physics and Bose-Einstein Condensates #Field (mathematics) #Magnetic field #Observable #Phase (matter) #Pulsars and Gravitational Waves Research #Quantum chaos and dynamical systems #Quasiparticle #Spinor #cond-mat.stat-mech
paper · pdf · doi:10.1088/0953-4075/34/21/302
6 pages 2 figures
arxiv created 2001/08/09 · openalex publication_date 2001/10/31 · arxiv updated 2009/11/30 · openalex created_date 2016/06/24 · openalex updated_date 2026/08/05
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 existence of a relative phase between the spinor amplitudes for the M = ±2,0 atoms.