QUROPE Quantum Information Processing and Communication in Europe

The fields of semiconductor quantum dots and superconducting circuits have both moved forward at a remarkable pace in the last 5 years, with both quantum technologies now holding great promise for practical quantum information processing (QIP). The concept of circuit quantum electrodynamics (QED), in which qubits are coupled to single microwave photons in a superconducting resonator has enabled much recent progress with superconducting circuits, and is a promising architecture for strong coupling cavity QED and QIP with a variety of other qubit systems. In this talk, I will present recent results of coupling a double quantum dot in GaAs, to a superconducting microwave resonator. The resonator transmission is used to measure the double dot system far into the regime in which transport is blocked to the leads, and coupling and coherence in the hybrid quantum circuit are analyzed.