Hannover 2020 – scientific programme
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A: Fachverband Atomphysik
A 8: Ultra-cold atoms, ions, and BEC II (joint session A/Q)
A 8.7: Talk
Monday, March 9, 2020, 15:45–16:00, f303
Dynamical control of conductivity in a bosonic Josephson junction — •Beilei Zhu1, Vijay Pal Singh1, Junichi Okamoto2, and Ludwig Mathey1,3 — 1Zentrum für Optische Quantentechnologien and Institut für Laserphysik, Universität Hamburg, Hamburg, Germany — 2Physikalisches Institut, Albert-Ludwigs-Universität Freiburg, Freiburg, Germany — 3The Hamburg Centre for Ultrafast Imaging, Hamburg, Germany
We propose to demonstrate dynamical enhancement of conductivity in a bosonic Josephson junction composed of two weakly coupled one dimensional condensates. A current is induced by a periodically modulated potential difference between the condensates, giving access to conductivity of the junction. We propose to control the conductivity via parametric driving of the tunneling energy. We demonstrate that the low frequency conductivity of the junction can be enhanced or suppressed, depending on the choice of the driving frequency. The experimental realization of this proposal constitutes a quantum simulation of recently proposed mechanism for optically induced superconductivity in pump-probe experiments.