Rostock 2019 – scientific programme
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Q: Fachverband Quantenoptik und Photonik
Q 21: Quantum Gases (Bosons) II
Q 21.1: Talk
Monday, March 11, 2019, 16:15–16:30, S HS 037 Informatik
Adiabatically ramping artificial magnetic fields: the role of the final gauge — •Botao Wang1, Xiaoyu Dong1,2, F. Nur Ünal1, and André Eckardt1 — 1Max Planck Institute for the Physics of Complex Systems, Noethnitzer Strasse 38, 01187 Dresden, Germany — 2Department of Physics and Astronomy, California State University, Northridge, CA, 91330, USA
Artificial gauge fields are a powerful tool for quantum simulation, allowing e.g. for the investigation of quantum Hall physics with charge neutral atoms in optical lattices. Considering an interacting bosonic ladder system, we investigate state preparation protocols, where a homogeneous magnetic field is switched on smoothly. Using simulations based on density matrix renormalization group (DMRG), we find that the fidelity for the degree of adiabaticity depends dramatically on the choice of the vector potential (i.e. the Peierls phases) used to implement the magnetic field, i.e. on the final gauge. This effect can be explained in terms of artificial electric fields resulting from the time-dependent vector potentials.