Surpassing the no-cloning limit with a heralded hybrid linear amplifier
Date
2017
Authors
Haw, Jing Yan
Zhao, Jie
Dias, Josephine
Assad, Syed
Bradshaw, Mark
Blandino, Remi
Symul, Thomas
Ralph, Timothy Cameron
Lam, Ping Koy
Journal Title
Journal ISSN
Volume Title
Publisher
IEEE
Abstract
The no-cloning theorem states that an unknown quantum state cannot be cloned exactly and deterministically. However, this limit can be circumvented by abandoning determinism and using probabilistic methods. Here, we report an experimental demonstration of probabilistic cloning of arbitrary coherent states that clearly surpasses the no-cloning limit. Our scheme is based on a hybrid linear amplifier that combines an ideal deterministic linear amplifier with a heralded measurement-based noiseless amplifier. We demonstrate the production of up to five clones with the fidelity of each clone clearly exceeding the corresponding no-cloning limit. Moreover, since successful cloning events are heralded, our scheme has the potential to be adopted in quantum repeater, teleportation and computing applications.
Description
Keywords
Citation
Collections
Source
2017 Conference on Lasers and Electro-Optics Pacific Rim, CLEO-PR 2017
Type
Conference paper
Book Title
Entity type
Access Statement
License Rights
DOI
10.1109/CLEOPR.2017.8119040
Restricted until
2037-12-31