Bonn 2010 – wissenschaftliches Programm

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MP: Fachverband Theoretische und Mathematische Grundlagen der Physik

MP 5: Quantum Information

MP 5.1: Vortrag

Dienstag, 16. März 2010, 16:45–17:10, JUR H

From quantum computation to quantum simulation: becoming more realistic. — •Dirk-Michael Schlingemann, Michael Keyl, and Zoltan Zimboras — ISI Foundation, Torino, Italy

The purpose of this talk is to introduce the basic tasks and goals of the EU FP7-project ``COQUIT (Collective quantum operations for information technology)''. Quantum systems are investigated which allow only a partial control by a constrained set of quantum operations. Typical examples are many particle quantum systems like cold atoms in optical lattices or other multi-atom ensembles, which can be manipulated collectively but not individually. Such restrictions are currently one of the biggest obstacles against working quantum computers. Instead of improving the corresponding experimental methods, we aim at a systematic study of the tasks which can be performed with currently available techniques. To this end we want to develop theoretical models which can on the one hand reflect the limitations of current experimental setups, but are on the other hand powerful enough to allow non-trivial practical applications. This point of view is new and complementary to most other research in quantum information science, where complete control over a small number of particles is assumed. One basic pillar of the COQUIT project is based on the concept of quantum simulation. Here a limited set of implementable operations is used to simulate physical properties of another quantum system. In this sense a quantum simulation device is a computational device for special purposes. We present the actual status of the project including new results and future perspectives.