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We apply a kinetic model to predict the existence of an instability mechanism in elongated Bose-Einstein condensates. Our kinetic description, based on the Wigner formalism, is employed to highlight the existence of unstable Bogoliubov waves that may be excited in the counterpropagation configuration. We identify a dimensionless parameter, the Mach number at T=0, that tunes different regimes of stability. We also estimate the magnitude of the main parameters at which two-stream instability is expected to be observed under typical experimental conditions.
- bose-einstein condensation
- quantum entanglement
- wave functions
Tercas, H., Mendonca, J. T., Robb, G. R. M., Fundacao para a Ciencia e Tecnologia (FCT-Portugal) (Funder), & Leverhulme Trust via research (Funder) (2009). Two-stream instability in quasi-one-dimensional Bose-Einstein condensates. Physical Review A, 79(6), [065601 ]. https://doi.org/10.1103/PhysRevA.79.065601