Researchers at the University of Basel and the Laboratoire Kastler Brossel have demonstrated how quantum mechanical entanglement can be used to measure several physical parameters simultaneously with greater precision.

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Researchers demonstrated using quantum entanglement across spatially separated atomic clouds to simultaneously measure multiple physical parameters with improved precision. The technique involves entangling atomic spins in a single cloud, then splitting it into separate parts that maintain quantum correlations. This approach reduces measurement uncertainties and can be applied to optical lattice clocks for more precise timekeeping and atom interferometer gravimeters for measuring spatial variations in Earth's gravitational field. The work extends previous quantum metrology techniques that only worked with atoms in a single location.

Entangled atomic clouds enable more precise quantum measurements

Improved measurements through entanglement

Applications in atomic clocks and gravimeters