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Proceeding Paper

Entanglement Assisted Transport of Two Walkers in Noisy Quantum Networks †

by 1,2,3,* and 1,2,3
1
European Laboratory for Non-Liner Spectroscopy (LENS), University of Florence, via N. Carrara 1-50019 Sesto F.no, Italy;
2
Department of Physics and Astronomy, University of Florence, via Sansone I-50019 Sesto F.no, Italy
3
CNR-INO & QSTAR, Largo Fermi 2 & 6, I-50125 Firenze, Italy
*
Author to whom correspondence should be addressed.
Presented at the 11th Italian Quantum Information Science conference (IQIS2018), Catania, Italy, 17–20 September 2018.
Proceedings 2019, 12(1), 36; https://doi.org/10.3390/proceedings2019012036
Published: 25 October 2019
(This article belongs to the Proceedings of 11th Italian Quantum Information Science conference (IQIS2018))
Understanding the transport mechanisms and properties of complex networks is fundamental for the comprehension of a vast class of phenomena, from state transfer on a spin network to light-harvesting in photosynthetic complexes. It has been theoretically and experimentally demonstrated that noise can enhance transport when the system parameters are properly tuned, an effect known as noise-assisted transport (NAT). In this work we investigate the role of initial entanglement in the transfer efficiency of two walkers in a noisy network. By using the formalism of quantum walks, we define a range of small dephasing noise where initial site-entanglement provides transport enhancement and outperforms the NAT effect. Furthermore, we show two specific scenarios where entanglement-assisted transport can open faster channels for slow walkers and avoid a broken link in a communication line. These findings may be of potential interest for quantum technologies.
Keywords: energy transport; two walkers; site-entanglement; quantum walks; noisy networks energy transport; two walkers; site-entanglement; quantum walks; noisy networks
MDPI and ACS Style

Colautti, M.; Caruso, F. Entanglement Assisted Transport of Two Walkers in Noisy Quantum Networks. Proceedings 2019, 12, 36. https://doi.org/10.3390/proceedings2019012036

AMA Style

Colautti M, Caruso F. Entanglement Assisted Transport of Two Walkers in Noisy Quantum Networks. Proceedings. 2019; 12(1):36. https://doi.org/10.3390/proceedings2019012036

Chicago/Turabian Style

Colautti, Maja, and Filippo Caruso. 2019. "Entanglement Assisted Transport of Two Walkers in Noisy Quantum Networks" Proceedings 12, no. 1: 36. https://doi.org/10.3390/proceedings2019012036

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