The science of quantum information has arisen over the last two decades centered on the
manipulation of individual quanta of information, known as quantum bits or qubits. Quantum …

Any physical process can be represented as a quantum channel map** an initial state to a
final state. Hence it can be characterized from the point of view of communication theory, ie …

Over the last decade, researchers have studied the interplay between quantum computing
and classical machine learning algorithms. However, measurements often disturb or destroy …

We prove the equivalence of an arbitrary single-mode Gaussian quantum channel and a
newly defined fiducial channel preceded by a phase shift and followed by a Gaussian …

Over the last decade, researchers have studied the synergy between quantum computing
(QC) and classical machine learning (ML) algorithms. However, measurements in QC often …

Irreversible entropy production (IEP) plays an important role in the field of quantum
thermodynamics. In the present work, we investigate the geometrical bounds of IEP in …

Optimization methods aimed at estimating the capacities of a general Gaussian channel are
developed. Specifically evaluation of classical capacity as maximum of the Holevo …

Quantum-information processing and computation with bosonic qubits are corruptible by
noise channels. Using interferometers and photon-subtraction gadgets (PSGs) …

The main topic of this thesis is the proof of two fundamental entropic inequalities for quantum
Gaussian channels. Quantum Gaussian channels model the propagation of electromagnetic …

The additivity problem asks if the use of entanglement can boost the information-carrying
capacity of a given channel beyond what is achievable by coding with simple product states …