Tunable quantum interference in a 3D integrated circuit

Zachary Chaboyer; Thomas Meany; L. G. Helt; Michael J. Withford; M. J. Steel

doi:10.1038/srep09601

Tunable quantum interference in a 3D integrated circuit

Zachary Chaboyer^*, Thomas Meany, L. G. Helt, Michael J. Withford, M. J. Steel

^*Corresponding author for this work

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71 Citations (Scopus)

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Abstract

Integrated photonics promises solutions to questions of stability, complexity, and size in quantum optics. Advances in tunable and non-planar integrated platforms, such as 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 Fisher information approaching a theoretical maximum. Our results open a path to quantum enhanced phase measurements.

Original language	English
Article number	9601
Pages (from-to)	1-5
Number of pages	5
Journal	Scientific Reports
Volume	5
DOIs	https://doi.org/10.1038/srep09601
Publication status	Published - 27 Apr 2015

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Version archived for private and non-commercial use with the permission of the author/s and according to publisher conditions. For further rights please contact the publisher.

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AU - Withford, Michael J.

AU - Steel, M. J.

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Tunable quantum interference in a 3D integrated circuit

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