Tuneable quantum interference in a 3D integrated circuit
arXiv:1409.4908 · doi:10.1038/srep09601
Abstract
Integrated photonics promises solutions to questions of stability, complexity, and size in quantum optics. Advances in tunable and non-planar integrated platforms, such laser-inscribed photonics, continue to bring the realisation of quantum advantages in computation and metrology ever closer, perhaps most easily seen in multi-path interferometry. Here we demonstrate control of two-photon interference in a chip-scale 3D multi-path interferometer, showing a reduced periodicity and enhanced visibility compared to single photon measurements. Observed non-classical visibilities are widely tunable, and explained well by theoretical predictions based on classical measurements. With these predictions we extract a Fisher information approaching a theoretical maximum, demonstrating the capability of the device for quantum enhanced phase measurements.
11 pages, 24 figures
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Cited by in corpus (7)
- Optimal measurements for simultaneous quantum estimation of multiple phases
- Experimental multiphase estimation on a chip
- Benchmarking integrated photonic architectures
- The New Phase due to Symmetry Protected Piecewise Berry Phases; Enhanced Pumping and Non-reciprocity in Trimer Lattices
- Invisibility Cloak Printed on a Photonic Chip
- Hybrid waveguide-bulk multi-path interferometer with switchable amplitude and phase
- Digital Waveguide Adiabatic Passage Part 2: Experiment