Quantum-state creation in nonlinear-waveguide arrays

Hamilton, C. S., Christ, R., Barkhofen, S., Barnett, S. M. , Jex, I. and Silberhorn, C. (2022) Quantum-state creation in nonlinear-waveguide arrays. Physical Review A: Atomic, Molecular and Optical Physics, 105(4), 042622. (doi: 10.1103/PhysRevA.105.042622)

Abstract

Many photonic quantum information tasks employ single photons and linear transformations to create and manipulate quantum states of light to process information. Integrated optical systems have become useful platforms to perform these tasks. New technologies introduce new possible processes available for multimode quantum operations. Here we explore one such setup, motivated by current experiments, which is a nonlinear-waveguide array system operating in a regime of nondegenerate-frequency down-converted photons. This allows one photon to act as a herald for the other photon, which is created in a superposition of the individual waveguide channels. We demonstrate this setup's ability to generate highly nonclassical states, such as N-photon Fock states and NOON states.

• Item Type: Articles
• Status: Published
• Refereed: Yes
• Glasgow Author(s) Enlighten ID: Barnett, Professor Stephen
• Authors: Hamilton, C. S., Christ, R., Barkhofen, S., Barnett, S. M., Jex, I., and Silberhorn, C.
• College/School: College of Science and Engineering > School of Physics and Astronomy
• Journal Name: Physical Review A: Atomic, Molecular and Optical Physics
• Publisher: American Physical Society
• ISSN: 2469-9926
• ISSN (Online): 2469-9934
• Published Online: 29 April 2022
• Copyright Holders: Copyright © 2022 American Physical Society
• First Published: First published in Physical Review A: Atomic, Molecular and Optical Physics 105(4): 042622
• Publisher Policy: Reproduced in accordance with the publisher copyright policy

Project Code	Award No	Project Name	Principal Investigator	Funder's Name	Funder Ref	Lead Dept
173378		Astronomy and physics, theoretical physics and application physics / Quantum Theory. Royal Society Research Professorship.	Stephen Barnett	The Royal Society (ROYSOC)	RP150122	P&S - Physics & Astronomy