Quantum essence of particle superfluidity

Life systems show an ultralow energy consumption in their high-efficiency bio-activities, implying a high-flux transport of ions and molecules with an ultralow resistivity. A collective motion (CM) of these particles is necessary for this kind of behaviors, different from the traditional Newtonian diffusion. The CM is an ordered particle state, resulting from the balance between attraction and repulsion of the particles, in which the attraction is a necessary condition. The ultralow resistivity of electronic or atomic fluid at low temperature is already described phenomenologically by introducing the interparticle attraction. Here, we try to establish a phenomenological expression for the quantum state of ion or molecule CM at ambient temperature, by also considering the attraction of particles. These studies suggest that the Bose-Einstein condensate potentially exists widely.