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A: Fachverband Atomphysik

A 9: Ultra-Cold Atoms, Ions and BEC II (with Q)

A 9.2: Vortrag

Mittwoch, 10. März 2010, 10:45–11:00, F 303

Few-boson tunneling in a double well with spatially modulated interaction. — •Budhaditya Chatterjee¹, Ioannis Brouzos², Sascha Zöllner³, and Peter Schmelcher² — ¹Physikalisches Institut, Universität Heidelberg, Philosophenweg 12, 69120 Heidelberg, Germany — ²Zentrum für Optische Quantentechnologien , Universität Hamburg, Luruper Chaussee 149, Gebäude 69, 22761 Hamburg, Germany — ³Niels Bohr International Academy, Niels Bohr Institute, Blegdamsvej 17, 2100 Copenhagen, Denmark

We study few-boson tunneling in a one-dimensional double well with a spatially modulated interaction. The dynamics changes from Rabi oscillations in the non-interacting case to a highly suppressed tunneling for intermediate coupling strengths followed by a revival near the fermionization limit. The dynamics is explained on the basis of the few-body spectrum and stationary eigenstates. For higher number of particles, N≥ 3 it is shown that the inhomogeneity of interaction can be tuned to generate tunneling resonances. Finally a tilted double-well and its interplay with the interaction asymmetry is discussed.