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A dynamical quantum simulator

Better than state-of-the-art numerical calculations

Munich, 03/20/2012

The key prospect of a quantum simulator is to access new physics that the best known classical algorithms can no longer keep track of. For the first time, a group around Professor Immanuel Bloch (Max Planck Institute of Quantum Optics and Ludwig-Maximilians-Universität Munich), in collaboration with theoretical physicists from the Ludwig-Maximilians-Universität Munich of the group of Professor Ulrich Schollwöck, the Forschungszentrum Jülich, the Institute for Advanced Study Berlin, and the University of Queensland (Australia), has demonstrated this superiority by following the dynamics of a quantum system of strongly correlated ultracold atoms in an optical lattice. In particular they were able to follow the relaxation of the isolated system which was initialized in a state far from equilibrium. The experimentally observed dynamics were in excellent agreement with numerical calculations which are available only for short evolution times. This demonstrates that many-body systems of ultracold atoms can be used as quantum simulators in a regime which is not accessible for classical computers. (Nature Physics, 19.2.2012)

Complete Press Release of the Max Planck Institute of Quantum Optics

„Probing the relaxation towards equilibrium in an isolated strongly correlated one-dimensional Bose gas“
S. Trotzky, Y-A. Chen, A. Flesch, I. P. McCulloch, U. Schollwöck, J. Eisert & I. Bloch
Nature Physics, AOP, 19. Februar 2012, Doi:10.1038/nphys2232

Professor Dr. Immanuel Bloch
LMU München
Max Planck Institute of Quantum Optics
Phone: +49 89 / 32 905 -138

Professor Dr. Ulrich Schollwöck
LMU München
Phone: +49 89 / 21 80 - 41 17

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