Suppression of tunneling in a superconducting persistent-current qubit
MetadataShow full item record
Publisher:American Physical Society
Citation:Rakesh P. Tiwari, D. Stroud, "Suppression of tunneling in a superconducting persistent-current qubit," Physical Review B 76, no. 22 (2007), doi:10.1103/PhysRevB.76.220505
We consider a superconducting persistent-current qubit consisting of a three-junction superconducting loop in an applied magnetic field. We show that by choosing the field, Josephson couplings, and offset charges suitably, we can perfectly suppress the tunneling between the two oppositely directed states of circulating current, leading to a vanishing of the splitting between the two qubit states. This suppression arises from interference between tunneling along different paths and is analogous to that predicted previously for magnetic particles with half-integer spin.
Rights:©2007 The American Physical Society
Items in Knowledge Bank are protected by copyright, with all rights reserved, unless otherwise indicated.