Fermi-Decay Law of Bose?Einstein Condensate Trapped in an Anharmonic Potential

摘要: The Fermi-decay law of Bose—Einstein condensate, which is trapped by a cigar-shaped anharmonic trap and subjected to weak random perturbation, investigated numerically calculating quantum fidelity (Loschmidt echo), reveal the coherence loss condensate. We find that there are three indispensable factors, trap, perturbation nonlinear interaction, in charging law. creates oscillations, causes disturbing their coherent while interaction enhances Based on law, some suggestions presented prolong time during coherently manipulating condensates.