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Atmospheric continuous-variable quantum communication [PDF]

open access: yesNew Journal of Physics, 2014
We present a quantum communication experiment conducted over a point-to-point free-space link of 1.6 km in urban conditions. We study atmospheric influences on the capability of the link to act as a continuous-variable (CV) quantum channel.
B Heim   +6 more
doaj   +4 more sources

Continuous-variable quantum neural networks

open access: yesPhysical Review Research, 2019
We introduce a general method for building neural networks on quantum computers. The quantum neural network is a variational quantum circuit built in the continuous-variable (CV) architecture, which encodes quantum information in continuous degrees of ...
Nathan Killoran   +5 more
doaj   +2 more sources

Impact of body mass index as a continuous variable on short‐ and long‐term outcomes in patients undergoing laparoscopic surgery for colon cancer [PDF]

open access: yesAnnals of Gastroenterological Surgery
Background The impact of obesity on colon cancer remains unclear. Very few studies of colon cancer surgery have analyzed body mass index (BMI) as a continuous variable, with no such reports from Japan. This study examined the association between BMI as a
Takayuki Aiba   +19 more
doaj   +2 more sources

Mapping Guaranteed Positive Secret Key Rates for Continuous Variable Quantum Key Distribution [PDF]

open access: yesEntropy
The standard way to measure the performance of existing continuous variable quantum key distribution (CVQKD) protocols is by using the achievable secret key rate (SKR) with respect to one parameter while keeping all other parameters constant.
Mikhael T. Sayat   +6 more
doaj   +2 more sources

Continuous-variable quantum passive optical network [PDF]

open access: yesLight: Science & Applications
To establish a scalable and secure quantum network, a critical milestone is advancing from basic point-to-point quantum key distribution (QKD) systems to the development of inherently multi-user protocols designed to maximize network capacity.
Adnan A. E. Hajomer   +5 more
doaj   +2 more sources

Bell violation for unknown continuous-variable states

open access: yesNew Journal of Physics, 2014
We describe a new Bell test for two-particle entangled systems that engages an unbounded continuous variable. The continuous variable state is allowed to be arbitrary and inaccessible to direct measurements.
X-F Qian, C J Broadbent, J H Eberly
doaj   +2 more sources

Neural Network-Powered Nonlinear Compensation Framework for High-Speed Continuous Variable Quantum Key Distribution

open access: yesIEEE Photonics Journal, 2022
In this paper, we present a neural network-based framework to compensate for the nonlinear distortion of high-speed continuous variable quantum key distribution (CV-QKD) systems.
Hang Zhang   +4 more
doaj   +1 more source

Theoretical development of discrete-modulated continuous-variable quantum key distribution

open access: yesFrontiers in Quantum Science and Technology, 2022
Continuous-variable quantum key distribution offers simple, stable and easy-to-implement key distribution systems. The discrete modulation scheme further reduces the technical difficulty.
Wen-Bo Liu   +5 more
doaj   +1 more source

Continuous-Variable Quantum Key Distribution Over Air Quantum Channel With Phase Shift

open access: yesIEEE Access, 2020
Continuous-variable quantum key distribution (CV-QKD) over air quantum channel enables to provide unconditional information security, which is the one of most promising techniques for information wireless transfer. Since the air channel is of fluctuation
Ming Li, Tianyi Wang
doaj   +1 more source

Polarization Attack on Continuous-Variable Quantum Key Distribution with a Local Local Oscillator

open access: yesEntropy, 2022
The estimation of phase noise of continuous-variable quantum key distribution protocol with a local local oscillator (LLO CVQKD), as a major process in quantifying the secret key rate, is closely relevant to the intensity of the phase reference. However,
Yun Shao   +8 more
doaj   +1 more source

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