Superconducting Quantum Circuits

From superconducting qubits to quantum technologies

The research in Prof. Kirchmair's group focuses on “circuit quantum electrodynamics systems”. Artificial two-level systems, i.e. qubits, are realized by using the non-linearity of a Josephson junction. The combination of these qubits with other superconducting circuits enables the realization of systems suitable for quantum information processing, quantum simulation and experiments in quantum optics. All necessary superconducting structures are manufactured by micro- and nano-fabrication processes in our own clean room facilities.

Our research interests include:

• Waveguide Quantum Electrodynamics: Multiple superconducting qubits are coupled via a microwave waveguide to form collective states. These states can be used as single photon sources and are used to mediate gate operations over distances of several centimeters.
• Magnetomechanics: Mechanical oscillators are magnetically coupled to a microwave circuit, enabling cooling, state detection and state preparation of the mechanics.
• High coherence resonators: We generate and manipulate arbitrary quantum states in a highly coherent microwave resonator by coupling it to a superconducting qubit.