Quantum simulation: Spin transport in a Mott insulator of ultracold fermions

Matthew A. Nichols, Lawrence W. Cheuk, Melih Okan, Thomas R. Hartke, Enrique Mendez, T. Senthil, Ehsan Khatami, Hao Zhang, Martin W. Zwierlein

Research output: Contribution to journalArticle

23 Scopus citations

Abstract

Strongly correlated materials are expected to feature unconventional transport properties, such that charge, spin, and heat conduction are potentially independent probes of the dynamics. In contrast to charge transport, the measurement of spin transport in suchmaterials is highly challenging.We observed spin conduction and diffusion in a system of ultracold fermionic atoms that realizes the half-filled Fermi-Hubbard model. For strong interactions, spin diffusion is driven by super-exchange and doublon-hole-assisted tunneling, and strongly violates the quantum limit of charge diffusion.The technique developed in this work can be extended to finite doping, which can shed light on the complex interplay between spin and charge in the Hubbard model.

Original languageEnglish (US)
Pages (from-to)383-387
Number of pages5
JournalScience
Volume363
Issue number6425
DOIs
StatePublished - Jan 25 2019
Externally publishedYes

All Science Journal Classification (ASJC) codes

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    Nichols, M. A., Cheuk, L. W., Okan, M., Hartke, T. R., Mendez, E., Senthil, T., Khatami, E., Zhang, H., & Zwierlein, M. W. (2019). Quantum simulation: Spin transport in a Mott insulator of ultracold fermions. Science, 363(6425), 383-387. https://doi.org/10.1126/science.aat4387