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• W2064791337 abstract "Twin photons — pairs of highly correlated photons — are one of the building blocks for quantum optics, and are used in both fundamental tests of quantum physics and technological applications. Now an efficient source for correlated atom pairs is demonstrated, promising to enable a wide range of experiments in the field of quantum matter-wave optics. In recent years, substantial progress has been made in exploringand exploiting the analogy between classical light and matter waves for fundamental investigations and applications1. Extending this analogy to quantum matter-wave optics is promoted by the nonlinearities intrinsic to interacting particles and is a stepping stone towards non-classical states2,3. In light optics, twin-photon beams4 are a key element for generating the non-local correlations and entanglement required for applications such as precision metrology and quantum communication5. Similar sources for massive particles have so far been limited by the multi-mode character of the processes involved or a predominant background signal6,7,8,9,10,11,12,13. Here we present highly efficient emission of twin-atom beams into a single transversal mode of a waveguide potential. The source is a one-dimensional degenerate Bose gas14 in the first radially excited state. We directly measure a suppression of fluctuations in the atom number difference between the beams to 0.37(3) with respect to the classical expectation, equivalent to 0.11(2) after correcting for detection noise. Our results underline the potential of ultracold atomic gases as sources for quantum matter-wave optics and should enable the implementation of schemes previously unattainable with massive particles5,15,16,17,18,19." @default.
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• W2064791337 date "2011-05-01" @default.
• W2064791337 modified "2023-10-01" @default.
• W2064791337 title "Twin-atom beams" @default.
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• W2064791337 doi "https://doi.org/10.1038/nphys1992" @default.
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