CURRENT AND MAGNETIC FIELD-CONTROLLED SUP ERCONDUCTING MULTITERMINAL MICROSTRUCTURES

The superconducting microstructures of special configuration - Josephs on's multiterminals (JMT), which represent a system of linked microbri dges are considered theoretically. Nonlinear interaction between diffe rent bridge junctions in JMT is caused by the coincidence of their cen ters and hence by the dependence of superconducting order parameter in each of weak links on currents passing through all microbridges. The dynamical equations are obtained, which determine the JMT behaviour de pending on controlling parameters -transport currents and external flu xes of magnetic field. Different regimes of JMT operation are consider ed: synchronization of Josephson oscillations, degeneracy of metastabl e states and symmetry breaking of the ground state in magnetic field.