Mainz 2017 – wissenschaftliches Programm
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Q: Fachverband Quantenoptik und Photonik
Q 29: Quantum Gases: Bosons IV
Q 29.4: Vortrag
Dienstag, 7. März 2017, 15:15–15:30, P 204
Models for a multimode bosonic tunneling junction — •David Fischer1 and Sandro Wimberger1,2,3 — 1Institut für Theoretische Physik, Philosophenweg 12, Universität Heidelberg, 69120 Heidelberg, Germany — 2Dipartimento di Scienze Matematiche, Fisiche e Informatiche, Università degli Studi di Parma, Parco Area delle Scienze 7/a, 43124 Parma, Italy — 3INFN, Sezione di Milano Bicocca, Gruppo Collegato di Parma,Italy
We discuss the relaxation dynamics for a bosonic tunneling junction with two modes in the central potential well. We use a master equation description for ultracold bosons tunneling into two central modes in the presence of noise and incoherent coupling processes. The master equation is solved exactly with quantum jump simulations. Whilst we cannot quantitatively reproduce the experimental data of the setup reported in [1], we find a reasonable qualitative agreement of the refilling process of the initially depleted central site. Furthermore an analysis of the time scale of the refilling shows a power-law behavior with respect to the decoherence rates, with similar exponents for all analyzed processes.
Our results may pave the way for the control of bosonic tunneling junctions by the simultaneous presence of decoherence processes and atom-atom interaction.
[1] R. Labouvie, B. Santra, S. Heun, S. Wimberger, and H. Ott, Phys. Rev. Lett. 115, 050601 (2015).