The more coherence between a set of waves, the stronger the coupling between them; the more discordant, the weaker the coupling.
Ironically, as new external energy is fed into the BEC the coupling is continually renewed. That energy is nuclear binding energy and Fano resonance will continue to produce a single wave form in a cavity by removing discordant wave forms through destructive interference. http://en.wikipedia.org/wiki/Fano_resonance
