L. Qian

Publications46
h-index14
Citations1,501
Highly Influential Citations42
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Experimental quantum key distribution with decoy states.
TLDR
By making simple modifications to a commercial quantum key distribution system, it is shown that a secure key generation rate of 165 bit/s, which is 1/4 of the theoretical limit, can be obtained over 15 km of a telecommunication fiber.
High-speed quantum random number generation by measuring phase noise of a single-mode laser.
TLDR
A high-speed random number generation scheme based on measuring the quantum phase noise of a single-mode laser operating at a low intensity level near the lasing threshold is presented and the generated random numbers have passed all the DIEHARD tests.
Experimental study on the Gaussian-modulated coherent-state quantum key distribution over standard telecommunication fibers
In this paper, we present a fully fiber-based one-way quantum-key-distribution (QKD) system implementing the Gaussian-modulated coherent-state (GMCS) protocol. The system employs a double…
Feasibility of quantum key distribution through a dense wavelength division multiplexing network
In this paper, we study the feasibility of conducting quantum key distribution (QKD) together with classical communication through the same optical fiber by employing…
A balanced homodyne detector for high-rate Gaussian-modulated coherent-state quantum key distribution
We discuss the excess noise contributions of a practical balanced homodyne detector (BHD) in Gaussian-modulated coherent-state (GMCS) quantum key distribution (QKD). We point out that the key…
Experimental demonstration of polarization encoding measurement-device-independent quantum key distribution.
TLDR
This work paves the way for the realization of a MDI-QKD network, in which the users only need compact and low-cost state-preparation devices and can share complicated and expensive detectors provided by an untrusted network server.
Proof-of-Principle Experimental Demonstration of Twin-Field Type Quantum Key Distribution.
TLDR
The estimated secure key rate from the experimental TFQKD data at the high loss region surpasses the repeaterless bound of QKD with current technology.
Security analysis of an untrusted source for quantum key distribution: passive approach
TLDR
This paper presents a passive approach to the security analysis of quantum key distribution (QKD) with an untrusted source and derived analytical expressions for the passive estimation scheme that makes it possible to implement the 'plug&play' QKD with the security guaranteed, while keeping the implementation practical.
Simulation and Implementation of Decoy State Quantum Key Distribution over 60km Telecom Fiber
TLDR
The first experiments on decoy state QKD are reported, thus bridging the gap between theory and experiment, and shows explicitly the power and feasibility of decoy method, and brings it to the real-life.
Discrete and continuous variables for measurement-device-independent quantum cryptography
TLDR
It is shown that the secret key rate of DV MDI QKD with commercially available high-efficiency single-photon detectors (SPDs) and good system alignment is typically rather high and thus highly suitable for not only long-distance communication but also metropolitan networks.
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