SUPERQIP · Super-conducting Quantum Information processing with Circuit QED
FP6 — Marie Curie Actions (Human Resources and Mobility)
- Duration
- 2007-02-01 → 2009-01-31
- EU contribution
- €173,831
- Participants
- 1
- Scheme
- EIF
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Results in brief
Final Activity Report Summary - SUPERQIP (Superconducting Quantum Information Processing with Circuit QED)
The realisation of computation that harnesses the power of quantum mechanics is a key goal in many areas of physics research today, and one which when finally achieved could revolutionize computing. Among the promising candidates for such a goal is an approach based on superconducting electrical circuits, with which fast progress has been made in the last few years. In this project a particular superconducting circuit architecture, known as Circuit QED, has been used to couple two superconducting quantum bits (qubits) to each other, through single microwave photons which live on a length of microwave transmission line on a chip. The two qubit 'entangled' states that were generated and characterized form the key component of a future quantum computer, and the method used is especially promising for scaling up to larger numbers of qubits. Amongst a number of other novel experiments carried out in the scope of the project, a second highlight was the observation of an important quantum mechanical effect known as 'Berry's Phase', for the first time on an electronic chip. The result is a demonstration of the high level of control over a single quantum system that can now be achieved with superconducting circuits, and will allow further investigations of this interesting geometrical effect to be carried out in the future. Control of the phase of a qubit is also important for quantum computation, and using geometric effects to control it has potential for being more robust against errors.
Data: CORDIS, © European Union
Project objective
Recently it has been demonstrated that a single two-level system (the cooper pair box) can be coupled to a single (microwave) photon in a new on-chip superconducting architecture, circuit quantum electrodynamics (QED). This realization of cavity QED in solid state has great promise in quantum optics and quantum information processing.Investigation of this system will open up exciting possibilities of interconversion of quantum information between stationary and flying qubits, interfacing with other important quantum technologies (such as ion traps), and coupling between multiple spatially separated qubits.In this fellowship the system will be specifically explored for application to quantum computing, targeting the demonstration of qubit-photon and qubit-qu bit entanglement, and multi-qubit quantum algorithms.The pursuit of these goals will be enabled by first experimentally optimizing qubit coherences and maximizing the qubit read-out fidelity. The project is hosted by a pioneer of the research field, and is set in the environment of world-class facilities and high expertise in cavity QED at ETH Zurich.The fellow has valuable relevant experience in nanoscale device fabrication and microwave techniques, and will gain new skills in superconducting circuit fabrication, experiments at millikelvin temperatures, ultra-low noise and high-speed microwave measurements, and expertise in the physics of quantum information processing and cavity QED.A high level of interaction with other research groups in Zurich, Switzerland and Europe is planned. The fellowship will hence be of considerable benefit to the fellow's career, and for the structuring of EU research in the emerging technology of quantum information processing.
Original text from CORDIS.
Participants
- EIDGENOSSISCHE TECHNISCHE HOCHSCHULE ZURICH · ZURICHCoordinatorCity levelSwitzerland
Links
Data: CORDIS, © European Union