Many-body Landau-Zener dynamics in coupled 1D Bose liquids

Abstract

The Landau-Zener model of a quantum mechanical two-level system driven with a linearly time dependent detuning has served over decades as a textbook paradigm of quantum dynamics. In their seminal work [L. D. Landau, Physik. Z. Sowjet. 2, 46 (1932); C. Zener, Proc. Royal Soc. London 137, 696 (1932)], Landau and Zener derived a non-perturbative prediction for the transition probability between two states, which often serves as a reference point for the analysis of more complex systems. A particularly intriguing question is whether that framework can be extended to describe many-body quantum dynamics. Here we report an experimental and theoretical study of a system of ultracold atoms, offering a direct many-body generalization of the Landau-Zener problem. In a system of pairwise tunnel-coupled 1D Bose liquids we show how tuning the correlations of the 1D gases, the tunnel coupling between the tubes and the inter-tube interactions strongly modify the original Landau-Zener picture. The results are explained using a mean-field description of the inter-tube condensate wave-function, coupled to the low-energy phonons of the 1D Bose liquid.

13 pages, 10 figures.

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Cited by in corpus (7)

• Non-perturbative stochastic method for driven spin-boson model
• Phase diagram of hard-core bosons on clean and disordered 2-leg ladders: Mott insulator - Luttinger liquid - Bose glass
• Linear quantum quench in the Heisenberg XXZ chain: time dependent Luttinger model description of a lattice system
• Bose-Einstein condensates in toroidal traps: instabilities, swallow-tail loops, and self-trapping
• Controlling high-frequency collective electron dynamics via single-particle complexity
• Landau-Zener sweeps and sudden quenches in coupled Bose-Hubbard chains
• Rigorous mean-field dynamics of lattice bosons: Quenches from the Mott insulator