Paper Info
Title
Improving Qkd For Entangled States With Low Squeezing Via Non-Gaussian Operations
Abstract
In this work we focus on evaluating the effectiveness of two non-Gaussian operations, photon subtraction (PS) and quantum scissors (QS) in terms of Continuous Variable (CV)-Quantum Key Distribution (QKD) over lossy channels. Each operation is analysed in two scenarios, one with the operation applied transmitter-side to a Two-Mode Squeezed Vacuum (TMSV) state and a second with the operation applied to the TMSV state receiver-side. We numerically evaluate the entanglement and calculate the QKD key rates produced in all four possible scenarios. Our results show that for a fixed value of initial squeezing in the TMSV state, the states produced by the non-Gaussian operations are more robust to loss, being capable of generating higher key rates for a given loss. More specifically, we find that for values of initial TMSV squeezing below 1.5dB the highest key rates are obtained by means of transmitter-QS. On the other hand, for squeezing above 1.5dB we find that receiver-PS produces higher key rates. Our results will be important for future CV-QKD implementations over free-space channels, such as the Earth-salellite channel.
Year
DOI
Venue
2019
10.1109/GCWkshps45667.2019.9024548
2019 IEEE GLOBECOM WORKSHOPS (GC WKSHPS)
DocType
ISSN
Citations 
Conference
2166-0069
0
PageRank 
References 
Authors
0.34
0
2
Name
Order
Citations
PageRank
Eduardo Villaseñor101.01
Robert A. Malaney240137.72