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Q: Fachverband Quantenoptik und Photonik

Q 10: Quantum Gases (Bosons) I

Q 10.7: Vortrag

Montag, 5. März 2018, 12:00–12:15, K 2.020

Off-resonant many-body quantum carpets in strongly tilted optical lattices — Manuel H. Muñoz-Arias, •Javier Madroñero, and Carlos A. Parra-Murillo — Physics Department, Universidad del Valle, Cali, Colombia

A unit filling Bose-Hubbard Hamiltonian embedded in a strong Stark field is studied in the off-resonant regime inhibiting single- and many-particle first-order tunnelling resonances. We investigate the occurrence of coherent dipole wavelike propagation along an optical lattice by means of an effective Hamiltonian accounting for second-order tunnelling processes. It is shown that dipole wave function evolution in the short-time limit is ballistic and that finite-size effects induce dynamical self-interference patterns known as quantum carpets.