Quantum key distribution (QKD) is the first quantum information task to reach the level of
mature technology, already fit for commercialization. It aims at the creation of a secret key …

Quantum communication (QC), namely, the faithful transmission of generic quantum states,
is a key ingredient of quantum information science. Here we demonstrate QC with …

Extending the single-photon transmission distance is a basic requirement for the
implementation of quantum communication on a global scale. In this work we report the …

For a practical quantum key distribution (QKD) system, parameter optimization, the choice of
intensities and the probabilities of sending them, is a crucial step in gaining optimal …

This paper provides a formula for the sacrifice bit-length for privacy amplification with the
Bennett–Brassard 1984 protocol for finite key lengths, when we employ the decoy method …

The nearest-neighbor spins in the one-dimensional spin-1/2 XX model with the added
Dzyaloshinskii-Moriya (DM) interaction are entangled at zero temperature. In the presence …

Coding technology is used in several information processing tasks. In particular, when noise
during transmission disturbs communications, coding technology is employed to protect the …

Twin-field quantum key distribution (TF-QKD) has the advantage of beating the rate-loss limit
(PLOB bound) for a repeaterless quantum key distribution (QKD) system. In practice …

Photon number resolving detectors can enhance the performance of many practical
quantum cryptographic setups. In this paper, we employ a simple method to estimate the …

This chapter is devoted to the discrete variable (DV) QKD protocols and represents the
continuation of Chap. 6. The chapter starts with the description of BB84 and decoy-state …