Many-Body Entanglement in Short-Range Interacting Fermi Gases for Metrology
arXiv:1904.03059 · doi:10.1103/PhysRevLett.123.060406
Abstract
We explore many-body entanglement in spinful Fermi gases with short-range interactions, for metrology purposes. We characterize the emerging quantum phases via Density-Matrix Renormalization Group simulations and quantify their entanglement content for metrological usability via the Quantum Fisher Information (QFI). Our study establishes a method, promoting the QFI to be an order parameter. Short-range interactions reveal to build up metrologically promising entanglement in the XY-ferromagnetic and cluster ordering, the cluster physics being unexplored so far.
arXiv comment5 pages, 4 figures + 10 pages, 8 figures of supplemental
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