Abstract

The experimental results that I will present harness the coherent interaction of individual microwave photons with superconducting qubits both for quantum information processing and for novel quantum optics experiments [1,2] in the circuit quantum electrodynamics (QED) architecture, see Fig. 1. In the resonant regime we observe the vacuum Rabi mode splitting. In the non-resonant regime we use the dispersive coupling between the qubit and the cavity field to perform high visibility quantum non-demolition (QND) measurements of the qubit state [3,4]. In the strong dispersive limit we also perform measurements of the cavity state from which the photon number statistics of the field can be extracted [5]. Generally, the circuit QED architecture is attractive for quantum information processing and as an interface in hybrid quantum systems.

© 2007 IEEE