In principle, quantum key distribution (QKD) offers information-theoretic security based on
the laws of physics. In practice, however, the imperfections of realistic devices might …

Although the unconditional security of quantum key distribution (QKD) has been widely
studied, the imperfections of the practical devices leave potential loopholes for Eve to spy …

Twin-field quantum key distribution can overcome the secret key capacity of repeaterless
quantum key distribution via single-photon interference. However, to compensate for the …

The security of quantum key distribution (QKD) is severely threatened by discrepancies
between realistic devices and theoretical assumptions. Recently, a significant framework …

Quantum communications is the art of exchanging and manipulating information beyond the
capabilities of the conventional technologies using the laws of quantum mechanics. With …

The passive approach to quantum key distribution (QKD) consists of removing all active
modulation from the users' devices, a highly desirable countermeasure to get rid of …

Decoy-state measurement-device-independent quantum key distribution (MDI-QKD) is
regarded as one of the most promising protocols since it is physically immune to all fatal …

Many quantum key distribution systems employ a laser followed by an optical attenuator to
prepare weak coherent states in the source. Their mean photon number must be …

Quantum key distribution (QKD) offers information-theoretic security based on the
fundamental laws of physics. However, device imperfections, such as those in active …

A passive quantum key distribution (QKD) transmitter generates the quantum states
prescribed by a QKD protocol at random, combining a fixed quantum mechanism and a post …