Karlsruhe 2011 – scientific programme

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MP: Fachverband Theoretische und Mathematische Grundlagen der Physik

MP 8: Quantum Mechanics and Many Particle Systems I

MP 8.1: Talk

Tuesday, March 29, 2011, 15:55–16:15, 30.45: 201

Strong-field-QED effects in an optical lattice — •Nikodem Szpak — Fakultät für Physik, Universität Duisburg-Essen

We present a model describing cold atoms in an optical lattice which shows phenomena known from the strong field QED (spontaneous pair creation, Schwinger effect). The main advantage of that analogue system is experimental accessibility of the strong field regime in contrast to the real QED. Formulation of the model requires a new derivation of an effective Fermi-Hubbard Hamiltonian from first principles of the (many-body) quantum field theory. We shall present main steps of the derivation followed by examples of the analogue QED effects appearing on the lattice obtained by analytical and numerical methods.