We analyze theoretically the performance of four-state quantum key distribution protocols
implemented with a realistic heralded single-photon source. The analysis assumes a noisy …

The single-photon detectionefficiency of the detector unit is crucial for the security of
common quantum key distribution protocols like Bennett-Brassard 1984 (BB84). A low value …

We propose a scheme for a quantum key distribution (QKD) protocol with dual-rail displaced
photon states. Displaced single-photon states with different amplitudes carry bit values of …

By employing pulses involving three-intensity, we propose a scheme for the measurement
device-independent quantum key distribution with heralded single-photon sources. We …

We propose a quantum key distribution scheme which closely matches the performance of a
perfect single photon source. It nearly attains the physical upper bound in terms of key …

To improve the performance of a quantum-key-distribution (QKD) system, high speed, low
dark count single photon detectors (or low-noise homodyne detectors) are required …

We propose a modified version of the Bennett–Brassard 1984 quantum key distribution
protocol intended to tolerate losses, certain forms of noise, and the so-called photon-number …

In this paper, we present schemes on implementing the single-photon-added coherent
source in quantum key distributions. We apply this source in either the standard BB84 …

Counterfactual quantum key distribution protocols allow two sides to establish a common
secret key using an insecure channel and authenticated public communication. As opposed …

We study decoy-state measurement-device-independent quantum key distribution using
heralded single-photon sources. This has the advantage that the observed error rate in the X …