Superfluidity and Chaos in low dimensional circuits

The hallmark of superfluidity is the appearance of a quantized metastable circulating current The Landau criterion links the metastability of such vortex state to its spectral stability i e to the inaccessibility of elementary excitations connecting it to other states with the same energy In low dimensional systems superfluid vortex states can exist due to their dynamical stability even if they are spectrally unstable This conventional paradigm associates superfluid vortex states with stationary stable fixed