Observation of many-body dynamics in long-range tunneling after a quantum quench

Florian Meinert, Manfred J. Mark, Emil Kirilov, Katharina Lauber, Philipp Weinmann, Michael Gröbner, Andrew J. Daley, Hanns Christoph Nägerl

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Abstract

Quantum tunneling is at the heart of many low-temperature phenomena. In strongly correlated lattice systems, tunneling is responsible for inducing effective interactions, and long-range tunneling substantially alters many-body properties in and out of equilibrium. We observe resonantly enhanced long-range quantum tunneling in one-dimensional Mott-insulating Hubbard chains that are suddenly quenched into a tilted configuration. Higher-order tunneling processes over up to five lattice sites are observed as resonances in the number of doubly occupied sites when the tilt per site is tuned to integer fractions of the Mott gap. This forms a basis for a controlled study of many-body dynamics driven by higher-order tunneling and demonstrates that when some degrees of freedom are frozen out, phenomena that are driven by small-amplitude tunneling terms can still be observed.

Original languageEnglish
Pages (from-to)1259-1262
Number of pages4
JournalScience
Volume344
Issue number6189
DOIs
Publication statusPublished - 13 Jun 2014

Keywords

  • quantum tunneling
  • quantum quench
  • low temperature

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Cite this

Meinert, F., Mark, M. J., Kirilov, E., Lauber, K., Weinmann, P., Gröbner, M., Daley, A. J., & Nägerl, H. C. (2014). Observation of many-body dynamics in long-range tunneling after a quantum quench. Science, 344(6189), 1259-1262. https://doi.org/10.1126/science.1248402