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 …

We suggest and demonstrate a tomographic method to characterise homodyne detectors at
the quantum level. The positive operator measure associated with the detector is expanded …

We address quantum M-ary phase-shift keyed communication channels in the presence of
phase diffusion and analyze the use of probabilistic noiseless linear amplifiers (NLAs) to …

We put forward a hybrid quantum key distribution protocol based on coherent states,
Gaussian modulation, and photon-number-resolving (PNR) detectors, and show that it may …

We propose a homodyne-like detection scheme involving photon-number-resolving
detectors to discriminate between two coherent states affected by either uniform or gaussian …

The impossibility of perfectly discriminating non-orthogonal quantum states imposes far-
reaching consequences both on quantum and classical communication schemes. We …

Dephasing is a prominent noise mechanism that afflicts quantum information carriers, and it
is one of the main challenges toward realizing useful quantum computation, communication …

We address binary phase-shift-keyed communication channels based on Gaussian states
and prove that squeezing improves state discrimination at fixed energy of the channel, and …

We address quantum communication channels based on phase modulation of coherent
states and analyze in detail the effects of static and dynamical (stochastic) phase diffusion …

We study the problem of transmitting classical information using quantum Gaussian states
on a family of phase-noise channels with a finite decoherence time, such that the phase …