Theory of coherent quantum phase slips in Josephson junction chains with periodic spatial modulations
Theory of coherent quantum phase slips in Josephson junction chains with periodic spatial modulations
We study coherent quantum phase slips which lift the ground state degeneracy in a Josephson junction ring, pierced by a magnetic flux of the magnitude equal to half of a flux quantum. The quantum phase-slip amplitude is sensitive to the normal mode structure of superconducting phase oscillations in the ring …