Advances in quantum technologies are giving rise to a revolution in the way fundamental
physics questions are explored at the empirical level. At the same time, they are the seeds …

This tutorial reviews the Holevo capacity limit as a universal tool to analyze the ultimate
transmission rates in a variety of optical communication scenarios, ranging from …

Measurement of the state of a quantum system with inherent quantum uncertainty (noise)
approaching the ultimate physical limits is of both technological and fundamental interest …

Quantum-enhanced measurements can provide information about the properties of a
physical system with sensitivities beyond what is fundamentally possible with conventional …

Communication is an integral part of human life. Today, optical pulses are the preferred
information carriers for long-distance communication. The exponential growth in data leads …

The achievable rate of information transfer in optical communications is determined by the
physical properties of the communication channel, such as the intrinsic channel noise …

The discrimination of two nonorthogonal states is a fundamental element for secure and
efficient communication. Quantum measurements of nonorthogonal coherent states can …

The quantum receiver is an important tool for overcoming the standard quantum limit (SQL)
of discrimination errors in optical communication. We theoretically study the quantum …

Discrimination of coherent states beyond the standard quantum limit (SQL) is an important
task not only for quantum information processing but also for optical coherent …

We propose quantum receivers with optical squeezing and photon-number-resolving
detectors (PNRDs) for the near-optimal discrimination of quaternary phase-shift-keyed …