Long-distance twin-field quantum key distribution with entangled sources

11/06/2021
by   Bing-Hong Li, et al.
0

Twin-field quantum key distribution (TFQKD), using single-photon-type interference, offers a way to exceed the rate-distance limit without quantum repeaters. However, it still suffers from the photon losses and dark counts, which impose an ultimate limit on its transmission distance. In this letter, we propose a scheme to implement TFQKD with an entangled coherent state source in the middle to increase its range, as well as comparing its performance under coherent attacks with that of TFQKD variants. Simulations show that our protocol has a theoretical distance advantage of 400 kilometers. Moreover, the scheme has great robustness against the misalignment error and finite-size effects. Our work is a promising step toward long-distance secure communication and is greatly compatible with future global quantum network.

READ FULL TEXT

page 1

page 2

page 3

page 4

research
09/06/2021

Coherent one-way quantum conference key agreement based on twin field

Quantum conference key agreement (CKA) enables key sharing among multipl...
research
12/22/2021

Breaking the Rate-Loss Relationship of Quantum Key Distribution with Asynchronous Two-Photon Interference

Twin-field quantum key distribution can overcome the repeaterless bound ...
research
03/27/2020

Asymptotically Secure Network Code for Active Attacks and its Application to Network Quantum Key Distribution

When there exists a malicious attacker in the network, we need to be car...
research
12/10/2022

Breaking universal limitations on quantum conference key agreement without quantum memory

Quantum conference key agreement is an important cryptographic primitive...
research
02/17/2019

Experimental Twin-Field Quantum Key Distribution Through Sending-or-Not-Sending

Channel loss seems to be the most severe limitation to the application l...
research
12/21/2021

Scalable High-Rate Twin-Field Quantum Key Distribution Networks without Constraint of Probability and Intensity

There have been several recent advancements in the field of long-distanc...
research
05/11/2021

Fast and Simple One-Way High-Dimensional Quantum Key Distribution

High-dimensional quantum key distribution (QKD) provides ultimate secure...

Please sign up or login with your details

Forgot password? Click here to reset