1999/04/30 by Alice Sinatra, Yvan Castin · 3 citations
Mathematics · Physics and Astronomy · #Binary number #Bose–Einstein condensate #Coherence (philosophical gambling strategy) #Cold Atom Physics and Bose-Einstein Condensates #Condensed matter physics #Coupling (piping) #Dynamics (music) #Materials science #Mathematics #Phase (matter) #Phase coherence #Physics #Quantum #Quantum decoherence #Quantum mechanics #Quantum, superfluid, helium dynamics #Scaling #Spatial coherence #Statistical physics #Strong Light-Matter Interactions #cond-mat
paper · pdf · doi:10.1007/s100530050042
published as Eur. Phys. J. D 8, 319 (2000). · 19 pages, 3 figures, final version of the paper
arxiv created 1999/10/26 · openalex publication_date 2000/02/01 · arxiv updated 2009/11/30 · openalex created_date 2025/10/10 · openalex updated_date 2026/08/06
We investigate the relative phase coherence properties and the occurrence of demixing instabilities for two mutually interacting and time evolving Bose-Einstein condensates in traps. Our treatment naturally includes the additional decoherence effect due to fluctuations in the total number of particles. Analytical results are presented for the breathe-together solution, an extension of previously known scaling solution to the case of a binary mixture of condensates. When the three coupling constants describing the elastic interactions among the atoms in the two states are close to each other, a dramatic increase of the phase coherence time is predicted. Numerical results are presented for the parameters of the recent JILA experiments.