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Tunable quantum interference in a 3D integrated circuit.

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.

SUBMITTER: Chaboyer Z

PROVIDER: S-EPMC5386201 | biostudies-literature | 2015 Apr

REPOSITORIES: biostudies-literature

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Tunable quantum interference in a 3D integrated circuit.

Chaboyer Zachary Z Meany Thomas T Helt L G LG Withford Michael J MJ Steel M J MJ

Scientific reports 20150427

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 visi ...[more]

PMID: 25915830

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