<> "The repository administrator has not yet configured an RDF license."^^ . <> . . "Spin squeezing and non-linear atom interferometry with Bose-Einstein condensates"^^ . "Interferometry is the most precise measurement technique known today. It is based on interference and therefore on the wave-like nature of the resources – photons or atoms – in the interferometer. As given by the laws of quantum mechanics the granular, particle-like features of the individually independent atoms or photons are responsible for the precision limit – the shot noise limit. However this “classical” bound is not fundamental and it is the aim of quantum metrology to overcome it by employing quantum correlations – entanglement – among the particles. We report on the realization of spin squeezed states suitable for atom interferometry based on two external modes of a Bose-Einstein condensate. We detect manybody entangled states which allow – in principle – for a precision gain of 35% over the shot noise limit in atom interferometry. We demonstrate a novel non-linear atom interferometer for Bose-Einstein condensates whose linear analog – the Ramsey interferometer – is used for the definition of the time standard. Within the non-linear interferometer we detect a large entangled state of 170 inseparable atoms. A measurement with this interferometer outperforms its ideal linear analog by 15% in phase estimation precision showing directly the feasibility of non-linear atom interferometry with Bose-Einstein condensates beyond “classical” precision limits."^^ . "2010" . . . . . . . . "Christian"^^ . "Groß"^^ . "Christian Groß"^^ . . . . . . "Spin squeezing and non-linear atom interferometry with Bose-Einstein condensates (PDF)"^^ . . . "Dissertation_Christian_Gross.pdf"^^ . . . "Spin squeezing and non-linear atom interferometry with Bose-Einstein condensates (Other)"^^ . . . . . . "indexcodes.txt"^^ . . . "Spin squeezing and non-linear atom interferometry with Bose-Einstein condensates (Other)"^^ . . . . . . "lightbox.jpg"^^ . . . "Spin squeezing and non-linear atom interferometry with Bose-Einstein condensates (Other)"^^ . . . . . . "preview.jpg"^^ . . . "Spin squeezing and non-linear atom interferometry with Bose-Einstein condensates (Other)"^^ . . . . . . "medium.jpg"^^ . . . "Spin squeezing and non-linear atom interferometry with Bose-Einstein condensates (Other)"^^ . . . . . . "small.jpg"^^ . . "HTML Summary of #10626 \n\nSpin squeezing and non-linear atom interferometry with Bose-Einstein condensates\n\n" . "text/html" . . . "530 Physik"@de . "530 Physics"@en . .