Simultaneous Readout of Noncommuting Collective Spin Observables beyond the Standard Quantum Limit.

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ID: 66817
2019
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Abstract
We augment the information extractable from a single absorption image of a spinor Bose-Einstein condensate by coupling to initially empty auxiliary hyperfine states. Performing unitary transformations in both the original and auxiliary hyperfine manifold enables the simultaneous measurement of multiple spin-1 observables. We apply this scheme to an elongated atomic cloud of ^{87}Rb to simultaneously read out three orthogonal spin directions and with that directly access the spatial spin structure. The readout even allows the extraction of quantum correlations which we demonstrate by detecting spin-nematic squeezing without state tomography.
Reference Key
kunkel2019simultaneousphysical Use this key to autocite in the manuscript while using SciMatic Manuscript Manager or Thesis Manager
Authors Kunkel, Philipp;Prüfer, Maximilian;Lannig, Stefan;Rosa-Medina, Rodrigo;Bonnin, Alexis;Gärttner, Martin;Strobel, Helmut;Oberthaler, Markus K;
Journal physical review letters
Year 2019
DOI
10.1103/PhysRevLett.123.063603
URL
Keywords
bose-einstein condensate condensed matter physics fluid dynamics superradiance vortex

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