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Walther-Meißner-Institut (WMI), Bayerische Akademie der Wissenschaften
Chair for Technical Physics (E23), Technische Universität München

DFG grants the second funding period (07/2007 - 06/2011) of SFB 631


May 31, 2007

SFB 631

The Senatsausschuss für die Angelegenheiten der Sonderforschungsbereiche of the Deutsche Forschungsgemeinschaft (DFG) has granted the second funding period of SFB 631 during his meeting on May 21 and 22, 2007. Within 18 research projects subdivided into three research areas, research groups from the Bavarian Academy of Sciences and Humanities (BAdW), the Technical University of Munich (TUM), the Ludwig-Maximilians-University (LMU), the Max-Planck-Institute for Quantum Optics (MPQ), as well as the University of Regensburg and the University of Augsburg are collaborating. In addition to the 35 principle investigators, more than 60 PhD and diploma students as well as a large number postdocs and guests scientists are involved in the research activities. Spokesman of SFB 631 is Prof. Rudolf Gross, Walther-Meißner-Institute of the BAdW and Chair for Technical Physics (E23) of TUM.

SFB631_Bild3 The Collaborative Research Center 631 on Solid-State Quantum Information Processing: Physical Concepts and Materials Aspects studies the physical concepts, materials aspects, and technological foundations of solid-state quantum information processing (SQIP). This interdisciplinary research field has the potential to revolutionize many areas of science and technology. It deals with the coherent dynamics of solid-state based quantum systems and has the daring vision to be able to process and communicate information on the basis of quantum mechanical principles. To realize this vision, the SFB 631 aims at the clarification of the key physical questions and technological problems related to SQIP:

  • How can we realize solid-state based quantum bits (qubits – the quantum mechanical generalizations of the classical bits in classical information processing) with sufficiently long decoherence time?
  • How can we effectively control, manipulate and read-out these qubits?
  • What are the optimum concepts for controlling decoherence?
  • How can we couple solid-state qubits to complex systems?
  • Which are the key materials aspects and technological problems to be solved for the successful implementation of SQIP?
  • How can we transfer qubit states to photons to generate an interface between solid-state quantum processors and quantum communication systems?

To clarify these questions in a fundamental and comprehensive way, the SFB 631 joins research activities from quantum information theory, experimental and theoretical solid-state physics, quantum optics, materials science, nanotechnology and electrical engineering. The objective is to achieve a profound understanding of the physics, technology, and materials aspects of SQIP by applying state of the art experimental and theoretical methods in a coordinated interdisciplinary research effort. Particular goals are to design and implement solid-state qubits with long decoherence time, to learn how to efficiently control, manipulate and read-out the qubits, to couple them to complex systems as well as to develop theoretical tools for modeling the dynamics of driven, damped qubits in different experimental systems. In the long term, the quantum properties of the solid-state qubits, namely the possibility to form superpositions of different quantum states and to entangle several qubits, form the basis for new, completely secure communication methods like quantum cryptography and quantum teleportation. SQIP also holds the promise of immense computing power far beyond the capabilities of classical computers. Finally, it is closely linked to a variety of emerging quantum technologies such as quantum sensors, quantum standards, or quantum measuring systems.


More information can be found on the homepage of SFB 631.

Contact: Rudolf.Gross@wmi.badw.de