Sensing rotations with multiplane light conversion

Abstract

We report an experiment estimating the three parameters of a general rotation. The scheme uses quantum states attaining the ultimate precision dictated by the quantum Cramér-Rao bound. We realize the states experimentally using the orbital angular momentum of light and implement the rotations with a multiplane light conversion setup, which allows one to perform arbitrary unitary transformations on a finite set of spatial modes. The observed performance suggests a range of potential applications in the next generation of rotation sensors.

8 pages, 4 figures. Comments welcome! arXiv admin note: text overlap with arXiv:2012.00590

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• Robust quantum metrology with random Majorana constellations
• Quantum multiphase estimation
• Spin coherence scale: operator-ordering sensitivity beyond the Heisenberg-Weyl group