Superconducting system with weak coupling to the current in the ground state
Bulaevskii L.N. , Kuzii V.V., Sobyanin A.A.
We consider a superconducting ring with a Josephson junction containing magnetic impurities. It is shown that if the tunneling through the magnetic impurities is large enough, then the ground state of such a system is a state with a current and a magnetic flux.