Erlangen 2018 – wissenschaftliches Programm

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Q: Fachverband Quantenoptik und Photonik

Q 18: Quantum Gases (Bosons) II

Q 18.3: Vortrag

Montag, 5. März 2018, 14:30–14:45, K 2.020

Periodically Modulated Interaction of Two Species Bosons on the Optical Lattice — •Shijie Hu¹, Tao Wang², Axel Pelster¹, Sebastian Eggert¹, and Xue-Feng Zhang³ — ¹Department of Physics and Research Center OPTIMAS, Technische Universität Kaiserslautern, Germany — ²Wuhan Institute of Technology, Hubei, China — ³Chongqing University, Chongqing, China

Systems far away from equilibrium show interesting new phenomena. In this work, we propose to generate a periodically driven system of two species of bosons on a one-dimensional optical lattice by modulating the magnetic field nearby a Feshbach resonance. We further investigate properties of this system by various numerical methods. Surprisingly, at zero-temperature we found that the driving is not always suppressing the superfluid order; instead it can abnormally enhance the order in a specific parameter region. In other regions, the driving can induce a new kind of superfluid order because the cooperation of particles and gauge phases. The results are consistent with a rigorous solution at an integrable point. We also discuss the behaviour at finite temperatures.