papers

Publications (7)

quant-ph2026

Precision Bounds for Characterising Quantum Measurements

Aritra Das, Simon K. Yung, Lorcan O. Conlon +6

Quantum measurements, alongside quantum states and processes, form a cornerstone of quantum information processing. However, unlike states and processes, their efficient characteri…

quant-ph2024

Comparison of Discrete Variable and Continuous Variable Quantum Key Distribution Protocols with Phase Noise in the Thermal-Loss Channel

Sebastian P. Kish, Patrick J. Gleeson, Angus Walsh +2

Discrete-variable (DV) quantum key distribution (QKD) based on single-photon detectors and sources have been successfully deployed for long-range secure key distribution. On the ot…

quant-ph2024

Verifying the security of a continuous variable quantum communication protocol via quantum metrology

Lorcan O. Conlon, Biveen Shajilal, Angus Walsh +4

Quantum mechanics offers the possibility of unconditionally secure communication between multiple remote parties. Security proofs for such protocols typically rely on bounding the…

quant-ph2023

Testing the postulates of quantum mechanics with coherent states of light and homodyne detection

Lorcan O. Conlon, Angus Walsh, Yuhan Hua +5

Quantum mechanics has withstood every experimental test thus far. However, it relies on ad-hoc postulates which require experimental verification. Over the past decade there has be…

quant-ph2025

All-Gaussian State Discrimination Beyond the Coherent Helstrom Bound

Angus Walsh, Lorcan Conlon, Biveen Shajilal +5

A core problem in communications is the optimal discrimination of binary-phase-shift-keyed (BPSK) signals. A longstanding goal has been to reach the fundamental quantum limit, know…

quant-ph2025

Enhanced continuous-variable quantum key distribution protocol via adaptive signal processing

Ozlem Erkilic, Biveen Shajilal, Lorcan O. Conlon +7

Quantum key distribution (QKD) provides a promising approach to secure communications, with continuous-variable QKD (CV-QKD) offering compatibility with existing telecommunication…