New Quantum Phase in a One-Dimensional Josephson Array
New Quantum Phase in a One-Dimensional Josephson Array
We examine the phase diagram of an ordered one-dimensional Josephson array of small grains. The average grain charge in such a system can be tuned by means of gate voltage. At small grain-to-grain conductance, this system is strongly correlated because of the charge discreteness constraint (Coulomb blockade). At the gate …