Advances in quantum cryptography

S Pirandola, UL Andersen, L Banchi… - Advances in optics …, 2020 - opg.optica.org
Quantum cryptography is arguably the fastest growing area in quantum information science.
Novel theoretical protocols are designed on a regular basis, security proofs are constantly …

Security analysis of continuous-variable quantum key distribution under limited eavesdropping with practical fiber

S Liu, L Fan, Z Li, Q Zhou, Y Li, D Wang, D Zhang… - Physical Review …, 2024 - APS
Research on optimal eavesdropping models under practical conditions will help to evaluate
realistic risk when employing a quantum key distribution system for secure information …

The gap persistence theorem for quantum multiparameter estimation

LO Conlon, J Suzuki, PK Lam, SM Assad - arXiv preprint arXiv:2208.07386, 2022 - arxiv.org
One key aspect of quantum metrology, measurement incompatibility, is evident only through
the simultaneous estimation of multiple parameters. The symmetric logarithmic derivative …

A modified practical homodyne detector model for continuous-variable quantum key distribution: Detailed security analysis and improvement by the phase-sensitive …

Y Huang, Y Zhang, B Xu, L Huang… - Journal of Physics B …, 2020 - iopscience.iop.org
The practical homodyne detector model of continuous-variable quantum key distribution
models the inherent imperfections of the practical homodyne detector, namely the limited …

Security Assumptions in Dispersive-Optics QKD

A Shlosberg, A Kwiatkowski, A Kyle, G Smith - arXiv preprint arXiv …, 2024 - arxiv.org
Quantum key distribution (QKD) seeks to provide a method of generating cryptographically-
secure keys between remote parties while guaranteeing unconditional security …

Quantifying Quantum Correlation of Quasi‐Werner State and Probing Its Suitability for Quantum Teleportation

A Chatterjee, K Thapliyal, A Pathak - Annalen der Physik, 2021 - Wiley Online Library
The significance of photon addition in engineering the single‐and two‐mode (bipartite
correlations) nonclassical properties of a quantum state is investigated. Specifically, the …

Four-state continuous-variable quantum key distribution with a hybrid linear amplifier

J Zhou, L Wu, Y Feng, H Li, J Shi, R Shi - Quantum Information Processing, 2023 - Springer
In this paper, a modified four-state continuous variable quantum key distribution protocol is
proposed by adding a hybrid linear amplifier to Bob's output. The heralded hybrid linear …

Information back-flow in quantum non-Markovian dynamics and its connection to teleportation

S Tserkis, K Head-Marsden, P Narang - arXiv preprint arXiv:2203.00668, 2022 - arxiv.org
A quantum process is called non-Markovian when memory effects take place during its
evolution. Quantum non-Markovianity is a phenomenon typically associated with the …

Dynamics of skew information correlations in two coupled qubit-systems under the high nonlinearity of a parametric amplifier: Intrinsic decoherence model

ABA Mohamed, EM Khalil, S Abdel-Khalek… - Physica A: Statistical …, 2021 - Elsevier
In this paper, we study the dynamics of skew information correlations, beyond its
concurrence entanglement, between two coupled qubits interacting with containing amplifier …

Improving Quantum Protocols in the Presence of Noise

AS Shlosberg - 2024 - search.proquest.com
The objective behind developing quantum technologies is to perform computation and
communication tasks that are infeasible using only classical resources. However, physical …