Work

Tunable quantum interference in a 3D integrated circuit

Year: 2015

Type: article

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.

Source: Scientific Reports

DOI: 10.1038/srep09601

Authors: Zachary Chaboyer, Thomas Meany, L. G. Helt, Michael J. Withford, M. J. Steel

Institutions: Centre for Ultrahigh Bandwidth Devices for Optical Systems, Macquarie University

Language: English

Topic: Quantum Information and Cryptography

Subfield: Atomic and Molecular Physics, and Optics

Field: Physics and Astronomy

Domain: Physical Sciences

Open Access status: gold

Estimated APC paid: $2,690

Funder: Australian National Fabrication Facility