Coherent Manipulation of Spin Correlations in the Hubbard Model

We coherently manipulate spin correlations in a two-component atomic Fermi gas loaded into an optical lattice using spatially and time-resolved Ramsey spectroscopy combined with high-resolution \textit{in situ} imaging. This novel technique allows us not only to imprint spin patterns but also to pro...

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Bibliographic Details
Published in:arXiv.org 2017-09
Main Authors: Wurz, N, Chan, C F, Gall, M, Drewes, J H, Cocchi, E, Miller, L A, Pertot, D, Brennecke, F, Köhl, M
Format: Article
Language:English
Subjects:
Brillouin zones
Correlation
Correlators
Image resolution
Magnetic structure
Optical lattices
Spin temperature
Structure factor
Thermalization (energy absorption)
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Summary:We coherently manipulate spin correlations in a two-component atomic Fermi gas loaded into an optical lattice using spatially and time-resolved Ramsey spectroscopy combined with high-resolution \textit{in situ} imaging. This novel technique allows us not only to imprint spin patterns but also to probe the static magnetic structure factor at arbitrary wave vector, in particular the staggered structure factor. From a measurement along the diagonal of the \(1^\mathrm{st}\) Brillouin zone of the optical lattice, we determine the magnetic correlation length and the individual spatial spin correlators. At half filling, the staggered magnetic structure factor serves as a sensitive thermometer for the spin temperature, which we employ to study the thermalization of spin and density degrees of freedom during a slow quench of the lattice depth.
ISSN:2331-8422
DOI:10.48550/arxiv.1709.08231