Characterization of optical quantum circuits using resonant phase shifts

Abstract

We demonstrate that important information about linear optical circuits can be obtained through the phase shift induced by integrated optical resonators. As a proof of principle, the phase of an unbalanced Mach-Zehnder interferometer is determined. Then the method is applied to a complex optical circuit designed for linear optical quantum computation. In this controlled-NOT gate with qubit initialization and tomography stages, the relative phases are determined as well as the coupling ratios of its directional couplers.

arXiv commentAccepted for publication in Appl. Phys. Lett

References in corpus (9)

• Review article: Linear optical quantum computing
• Universal Linear Optics
• Quantum process tomography of a controlled-NOT gate
• Linear Optical CNOT Gate in the Coincidence Basis
• Multi-photon quantum interference in a multi-port integrated photonic device
• Direct characterization of linear-optical networks
• Quantum interference in heterogeneous superconducting-photonic circuits on a silicon chip
• Broadband nanoelectromechanical phase shifting of light on a chip
• Design and characterization of integrated components for SiN photonic quantum circuits

Cited by in corpus (3)

• Controlled integration of selected detectors and emitters in photonic integrated circuits
• Aluminum nitride integration on silicon nitride photonic circuits: a new hybrid approach towards on-chip nonlinear optics
• Growth of Aluminum Nitride on a Silicon Nitride Substrate for Hybrid Photonic Circuits