Prof.
Dieter Schuch
(Goethe-Universität Frankfurt am Main)
25/06/18, 10:15
For quadratic Hamiltonians, the time-dependent Schrödinger equation possesses Gaussian wave packets as exact solutions. They are completely determined by two parameters, the maximum and the width, where both can be time-dependent. The time-dependence of the maximum is determined by the classical Newtonian equation of motion; the width obeys a complex quadratically nonlinear Riccati equation or...
Prof.
Antonello Scardicchio
(ICTP - International Centre for Theoretical Physics- Trieste)
25/06/18, 11:30
Abstract: I will review some recent results on ergodicity breaking in
many-body systems due to quantum effects. I will underline the
similarities and differences with ergodicity breaking in spin glasses, in
particular looking at the random energy model, the p-spin model and the
Edwards-Anderson spin glass on the Bethe lattice endowed with quantum
dynamics.
Prof.
Luigi Martina
(Universita' del Salento - Lecce)
25/06/18, 12:15
Within the framework of Oseen-Frank
theory, we analyse the static configurations for chiral liquid crystals.
In particular, we find numerical solutions for localised axisymmetric
states in confined chiral liquid crystals with weak homeotropic
anchoring at the boundaries. These solutions describe the distortions of
two-dimensional skyrmions, known as either textit{spherulites}...
Prof.
Massimo Blasone
(Università di Salerno)
25/06/18, 15:30
In the attempt to find a deterministic description of quantum systems,
’t Hooft proposed the idea that deterministic degrees of freedom could
operate at very high energy scales (e.g. Planck scale) and ordinary
quantum mechanics would appear as a result of an information loss
process. This implies the existence of “beables”, i.e. ontological
(commuting) operators which, after...
Sig.na
Natalia Sánchez Kuntz
(ICN, UNAM)
25/06/18, 16:15
This talk is around the discussion of the nature of the quantum state: is the quantum state an ontological description of the system or is it just an epistemological tool for prediction?
In this talk I will make a revision of the PBR theorem; through this I will prove that in order to conclude that a certain quantum state is ontological, by carrying out the demonstration of the PBR...
Sig.
Hans Cruz Prado
(Goethe Universität Frankfurt am Main)
25/06/18, 17:30
We review the concept of dissipation from quantum to classical systems, proving that
it does not make sense to say that a system is "conservative" or "dissipative" per
se because dissipation is a relational concept. In this spirit, we introduce a
"descomposition principle" that allows describe “dissipative” systems in terms of
“Contact Lagrangian structures”.
Elisa Ercolessi
(Univ. Bologna & INFN)
26/06/18, 09:30
We will discuss a variant of the Schwinger model that describes 1+1 QED which admits symmetry-protected phases. We will show the appearance of such a phase via both bosonization and DMRG calculations.
Prof.
Rafael D. Sorkin
(Perimeter Institute for Theoretical Physics)
26/06/18, 11:30
Why should (and why can) the path integral serve as the basis for quantum theory (and quantum gravity)
Sig.
Giovanni Gramegna
(Università degli Studi di Bari, INFN)
26/06/18, 12:15
We show that the evolution of a quantum system can be controlled using two different procedures, one hinging upon a strong continuous coupling with an external control potential and the other consisting in the application of instantaneous unitary kicks to the system with high frequency, yielding a "bang-bang evolution". In both cases the Hilbert space is partitioned in subspaces among which...
Prof.
Fernando Falceto
(Universidad de Zaragoza)
27/06/18, 09:30
We discuss the Heisenberg equation for operators that do not
preserve the boundary conditions for the domain of the Hamiltonian. We show that it acquires an anomalous term that depends only on the boundary values.
We briefly review the theory of selfadjoint extensions of symmetric
operators where the above mentioned anomalous term plays the key role.
We show how the previous results...
Florio Maria Ciaglia
(INFN-Sezione di Napoli, and Max Planck Institute for Mathematics in the Sciences Leipzig)
27/06/18, 10:15
An alternative formulation of Quantum Mechanics based on selective measurements due to Schwinger is reviewed. It is argued that the mathematical structure behind Schwinger’s “Symbolism of Atomic Measurements” is that of a groupoid. In this framework, both the Hilbert space (Schrödinger picture) and the C*-algebra (Heisenberg picture) of the system turn out to be derived concepts, that is, they...
Prof.
Manolo Asorey
(Universidad de Zaragoza)
27/06/18, 11:30
We will review some basic aspects of the covariant approach to
quantum mechanics in a framework free of ultraviolet singularities.
Some higher derivative field theories are also free of ultraviolet
singularities and ghosts. They seem to provide a safe
framework also for quantum field theories.
However, we point out that they undergo hidden pathologies and in spite
of the absence of...
Dr.
Antonella De Pasquale
(University of Florence, Department of Physics and Astronomy)
27/06/18, 12:15
We provide a dynamical description of the quantum measurement process by framing it into the mindset of the theory of open quantum systems. The system and the measurement apparatus are considered as interacting quantum objects, such that the former “steals” information from the latter. In this formalism, after a given amount of time, the measurement process emerges in the form of an entangled...
Dr.
Goffredo Chirco
(Max Planck Institute for Gravitational Physics (Albert Einstein Institute)-Potsdam)
27/06/18, 16:15
I consider the extension of Souriau's formalism of Lie group thermodynamics to the
case of constrained hamiltonian systems and gauge theories, in the perspective of a
general covariant reformulation of statistical mechanics compatible with the
conceptual framework of General Relativity.
Sig.
Alessandro Carotenuto
(SISSA)
27/06/18, 17:30
Jordan algebras provide suitable ground to formalize properties of a finite dimensional quantum geometry.
Recently M. Dubois-Violette proposed an interpretation both of quark-lepton symmetry and of the existence of three generations of particles in terms of rapresentations of the exceptional Jordan algebra.
During this talk I shall review such a theory and then present some recent results...
Prof.
Dariusz Chru ́sci ́nski
(Nicolaus Copernicus University Torun)
29/06/18, 09:30
We analyze the relation between CP-divisibility and the lack of information back flow
for an arbitrary not necessarily invertible dynamical map [1,2,3]. It is well known that
CP-divisibility always implies lack of information back flow. Moreover, these two notions
are equivalent for invertible maps. We show that for a map which is not invertible the
lack of information back flow always...
Sig.
Marco Laudato
(Università dell'Aquila)
29/06/18, 10:15
The so-called q-z-Rényi Relative Entropies provide huge two parameters family of relative entropies which include almost all well-known examples of quantum relative entropies for suitable values of the parameters. In this talk we consider a log-regularized version of this family and use it as a family of potential functions to generate covariant (0,2) symmetric tensors on the space of...
Dr.
Zeinab Kordi
(INFN, Sezione di Bari, I-70126 Bari, Italy)
29/06/18, 12:15
In this talk, the superluminal and slow light propagation in quantum system will be reviewed theoretically and experimentally. We will show how the medium response to light such as absorption and dispersion could be controlled by the intensity of applied fields. In fact the probe pulse propagation can be switched from subluminal to superluminal by changing the intensity of the coupling field
Prof.
Giuseppe Marmo
(Università FEDERICO II e INFN di NAPOLI)
29/06/18, 17:30
