BibTex format

author = {Walton, A and Ghesquiere, A and Brumpton, G and Jennings, D and Varcoe, B},
doi = {1361-6455/ac2a6e},
journal = {Journal of Physics B: Atomic, Molecular and Optical Physics},
title = {Thermal state quantum key distribution},
url = {},
volume = {54},
year = {2021}

RIS format (EndNote, RefMan)

AB - We analyse a central broadcast continuous variable quantum key distribution protocol in which a beam produced by a thermal source is used to create a secret key between two parties, Alice and Bob. A beam splitter divides the initial beam into a pair of output beams, which are sent to Alice and Bob, with Eve intercepting Bob's beam. We investigate the protocol in detail, calculating mutual informations through a pair of analytic methods and comparing the results to the outputs of a Monte Carlo simulation of the protocol. In a lossless system, we find that a lower bound on the key rate remains positive in the protocol under a beam splitter attack, provided Bob receives a nonzero proportion of the beam initially sent to him. This suggests that the thermal state protocol could be used experimentally to produce secure keys.
AU - Walton,A
AU - Ghesquiere,A
AU - Brumpton,G
AU - Jennings,D
AU - Varcoe,B
DO - 1361-6455/ac2a6e
PY - 2021///
SN - 0953-4075
TI - Thermal state quantum key distribution
T2 - Journal of Physics B: Atomic, Molecular and Optical Physics
UR -
UR -
UR -
UR -
VL - 54
ER -