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• W3028543896 abstract "Quantum simulations with ultra-cold atoms in optical lattices open up an exciting path towards understanding strongly interacting quantum systems. Atom gas microscopes are crucial for this as they offer single-site density resolution, unparalleled in other quantum many-body systems. However, currently a direct measurement of local coherent currents is out of reach. In this work, we show how to achieve that by measuring densities that are altered in response to quenches to non-interacting dynamics, e.g., after tilting the optical lattice. For this, we establish a data analysis method solving the closed set of equations relating tunnelling currents and atom number dynamics, allowing to reliably recover the full covariance matrix, including off-diagonal terms representing coherent currents. The signal processing builds upon semi-definite optimization, providing bona fide covariance matrices optimally matching the observed data. We demonstrate how the obtained information about non-commuting observables allows to lower bound entanglement at finite temperature which opens up the possibility to study quantum correlations in quantum simulations going beyond classical capabilities." @default.
• W3028543896 created "2020-05-29" @default.
• W3028543896 creator A5000771982 @default.
• W3028543896 creator A5016124993 @default.
• W3028543896 date "2021-08-24" @default.
• W3028543896 modified "2023-10-12" @default.
• W3028543896 title "Recovering Quantum Correlations in Optical Lattices from Interaction Quenches" @default.
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• W3028543896 doi "https://doi.org/10.1103/physrevlett.127.090503" @default.
• W3028543896 hasPubMedId "https://pubmed.ncbi.nlm.nih.gov/34506183" @default.
• W3028543896 hasPublicationYear "2021" @default.
• W3028543896 type Work @default.
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• W3028543896 hasAuthorship W3028543896A5000771982 @default.

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