Rapid Phase-Diffusion Between Atomic and Molecular Bose-Einstein Condensates

I. Tikhonenkov, A. Vardi

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We study the collisional loss of atom-molecule coherence after coherently dissociating a small fraction of a molecular Bose-Einstein condensate into atoms. The obtained $n$-atoms states are two-atom (SU(1,1)) coherent states with number variance Δn∝n compared to Δn∝√n for the spin (SU(2)) coherent states formed by coherent splitting of an atomic condensate. Consequently, the Lorentzian atom-molecule phase-diffusion is faster than the Gaussian phase-diffusion between separated atomic condensates, by a √n factor.
Original languageEnglish GB
Article number051604
JournalPhysical Review A
StatePublished - 14 Apr 2009


  • cond-mat.quant-gas


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