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Erlangen 2018 – scientific programme

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Q: Fachverband Quantenoptik und Photonik

Q 70: Ultracold Atoms II (joint session Q/A)

Q 70.4: Talk

Friday, March 9, 2018, 11:15–11:30, K 1.022

Few bosons in a double well — •Frank Schäfer1, Miguel Bastarrachea1, Axel U. J. Lode2,3, Laurent de Forges de Parny1, and Andreas Buchleitner11Physikalisches Institut, Albert-Ludwigs-Universität Freiburg, Hermann-Herder-Straße 3, D-79104, Freiburg, Germany — 2Wolfgang Pauli Institute c/o Faculty of Mathematics, University of Vienna, Oskar-Morgenstern Platz 1, 1090 Vienna, Austria — 3Vienna Center for Quantum Science and Technology, Atominstitut, TU Wien, Stadionallee 2, 1020 Vienna, Austria

We investigate the spectral and dynamical properties of interacting bosons in a double well. A combination of exact diagonalization with a multi-configurational time-dependent Hartree approach allows us to analyse the time evolution of two- and three- particle states for variable initial conditions, and furthermore subject to (a-)diabatic switching of the tunnelling barrier. We discuss first results for the particles initially prepared at the ground state or at the saddle-point energy, and contrast single- vs. many-particle aspects of the dynamics.

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