Multimode dynamics and emergence of a characteristic length-scale in a one-dimensional quantum system

Maximilian Kuhnert; Remi Geiger; Tim Langen; Michael Gring; Bernhard Rauer; Takuya Kitagawa; Eugene Demler; David Adu Smith; Jörg Schmiedmayer

doi:10.1103/physrevlett.110.090405

arXiv · 1211.5323

Multimode dynamics and emergence of a characteristic length-scale in a one-dimensional quantum system

Maximilian Kuhnert·Remi Geiger·Tim Langen·Michael Gring·Bernhard Rauer·Takuya Kitagawa·Eugene Demler·David Adu Smith·Jörg Schmiedmayer

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Abstract

We study the non-equilibrium dynamics of a coherently split one-dimensional (1d) Bose gas by measuring the full probability distribution functions of matter-wave interference. Observing the system on different length scales allows us to probe the dynamics of excitations on different energy scales, revealing two distinct length-scale dependent regimes of relaxation. We measure the crossover length-scale separating these two regimes and identify it with the prethermalized phase-correlation length of the system. Our approach enables a direct observation of the multimode dynamics characterizing one-dimensional quantum systems.

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Maximilian Kuhnert, Remi Geiger, Tim Langen, Michael Gring, Bernhard Rauer, Takuya Kitagawa, Eugene Demler, David Adu Smith, Jörg Schmiedmayer. 2012-11-22. Multimode dynamics and emergence of a characteristic length-scale in a one-dimensional quantum system. https://doi.org/10.1103/physrevlett.110.090405

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