PerspectiveCold-Atom Physics

Polarons leave a trace

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Science  19 Jul 2019:
Vol. 365, Issue 6450, pp. 218
DOI: 10.1126/science.aax6486

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Summary

The physics of large many-particle quantum systems is barely tractable with first-principles approaches but can often be explored through quantum simulation, in which a well-controlled system, such as interacting ultracold atoms, acts as an analog quantum computer for a problem of interest. Great progress has been made in the experimental preparation of low-entropy states of ultracold atoms in optical lattices for this purpose. Typical target systems are numerically intractable and not realized in nature in their ideal form, such as the Fermi-Hubbard model. On page 251 of this issue, Chiu et al. (1) used single-atom and single-site resolved imaging of ultracold atoms on a lattice to study the doped Fermi-Hubbard model and report the nature of its microscopic correlations in real space.

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