Abstract

A full-scale quantum computer will consist of a large number of quantum bits integrated with classical circuitry for manipulation and readout of the state of the quantum bits. In a superconducting flux qubit implementation coupling from qubit to qubit and qubit to control circuitry is inductive. We have modeled the dynamics of the phase of a superconducting flux qubit coupled inductively with large scale integrated control circuitry and determined timescales for the loss of phase coherence of the qubit based on the strength of that coupling. Measurements of the magnetic environment of active, superconducting magnetic flux-based control circuitry indicate signal levels that delineate a limit to the integration density of flux-based qubits and control circuitry. Furthermore, strategies for decreasing parasitic couplings in an integrated circuit environment are discussed.

Date

January 1, 1970

Authors

Jonathan L Habif, Marc Feldman, Mark Bocko

Journal

APS March Meeting Abstracts

Volume

2004

Pages

D37. 005