Quantum receiver for phase-shift keying at the single photon level

Jasminder Sidhu; Shuro Izumi; Jonas Neergaard-Nielsen; Cosmo Lupo; Ulrik Andersen

doi:10.1117/12.2598974

6 October 2021 Quantum receiver for phase-shift keying at the single photon level

Jasminder Sidhu, Shuro Izumi, Jonas Neergaard-Nielsen, Cosmo Lupo, Ulrik Andersen

Proceedings Volume 11881, Quantum Technology: Driving Commercialisation of an Enabling Science II; 1188105 (2021) https://doi.org/10.1117/12.2598974
Event: SPIE Photonex, 2021, Glasgow, United Kingdom

Abstract

Quantum enhanced receivers are endowed with resources to achieve higher sensitivities than conventional technologies. For application in optical communications, they provide improved discriminatory capabilities for multiple non-orthogonal quantum states. In this work, we propose and experimentally demonstrate a new decoding scheme for quadrature phase-shift encoded signals. Our receiver surpasses the standard quantum limit and outperforms all previously known non-adaptive detectors at low input powers. Unlike existing approaches, the receiver only exploits linear optical elements and on-off photo-detection. This circumvents the requirement for challenging feed-forward operations that limit communication transmission rates and can be readily implemented with current technology.

Conference Presentation

Citation Download Citation

Jasminder Sidhu, Shuro Izumi, Jonas Neergaard-Nielsen, Cosmo Lupo, and Ulrik Andersen "Quantum receiver for phase-shift keying at the single photon level", Proc. SPIE 11881, Quantum Technology: Driving Commercialisation of an Enabling Science II, 1188105 (6 October 2021); https://doi.org/10.1117/12.2598974

ACCESS THE FULL ARTICLE

INSTITUTIONAL
Select your institution to access the SPIE Digital Library.

SELECT YOUR INSTITUTION

PERSONAL
Sign in with your SPIE account to access your personal subscriptions or to use specific features such as save to my library, sign up for alerts, save searches, etc.

PERSONAL SIGN IN

No SPIE Account? Create one

PURCHASE THIS CONTENT

SUBSCRIBE TO DIGITAL LIBRARY

50 downloads per 1-year subscription

Members: $195

Non-members: $335 ADD TO CART

25 downloads per 1 - year subscription

Members: $145

Non-members: $250 ADD TO CART

PURCHASE SINGLE ARTICLE

Includes PDF, HTML & Video, when available