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Gaussian and non-Gaussian resources in Quantum Information
(2013-04-05)
This dissertation was carried out within the framework of the Quantum Information (QI). In particular, I have analyzed the main aspects: the protocol, the quantum states, the conditional measurements, and the decoherence.
The ...
Quantum Information Theory in Condensed Matter Physics
(2017-05-22)
In the “standard” Gizburg-Landau approach, a phase transition is intimately
connected to a local order parameter, that spontaneously breaks some symmetries. In addition to the “traditional” symmetry-breaking ordered phases, ...
Quantumness of gaussian and non-gaussian states in the optical domain
(2013-04-04)
The Dissertation Quantumness of Gaussian and non-Gaussian states in the op-
tical domain collects my personal both theoretical and experimental contribu-
tions, in the context of the Quantum Information theory in continuous ...
An insight into gravitational microlensing and the search for exoplanetary systems
(2015-04-30)
Nature always offers astonishing shows to the humankind. Gravitational lensing is one of the most intriguing effects which can be observed, and the astrophysical applications of such a phenomenon span from particle physics ...
Exact solutions in general relativity and alternative theories of gravity: mathematical and physical properties
(2011-06-06)
In this thesis, we discuss several subjects connected with the framework
of GR, in order to characterize astrophysical compact objects. The main
purpose is to provide simple models describing gravitational fields generated ...
Trasporto quantistico di spin in eterostrutture magnetiche
(2012-06-04)
In questa tesi abbiamo studiato il trasporto di spin polarizzato e la torsione
dello spin usando l’apporoccio della matrice di scattering secondo la teoria
di Buttiker, nel caso di barriere magnetiche finite sotto l'effetto ...
Signatures of quantumness: identification, quantification and dynamical preservation
(2016-04-14)
The quanti cation of quantumness is necessary to assess how much a physical system
departs from a classical behaviour and thus gauge the quantum enhancement in opera-
tional tasks such as information processing and ...
Flavor mixing in quantum field theory and quantum information
(2011-05-10)
After reviewing the formalism for describing flavor mixing, both in Quantum Mechanics
and Quantum Field Theory, some consequences along three different directions are studied.
First, it is proposed that flavor mixing can ...
Particle mixing, two level systems and gauge theory
(2012-04-26)
In this thesis I will discuss the theory of two level systems and the theory
of the oscillating particles in quantum eld theory.
In the rst chapter I will consider the time evolution of a two level system,
a qubit, to ...
Non-markovian quantum dynamics
(2016-04-28)
Quantum systems can necessarily be viewed as open systems. As in classical
physics, any realistic description of a system must take into account the cou-
pling to an environment that strongly in
uences the system itself. ...