SM&FT 2019 - The XVIII Workshop on Statistical Mechanics and nonpertubative Field Theory

Session

Session 2

11 Dec 2019, 11:30

Salone degli Affreschi, Palazzo Ateneo Università "Aldo Moro" Bari

Conveners

Session 2

• Michele Caselle (TO)

30. Frozen relaxation dynamics in the presence of breathers

Paolo Politi (FI)

11/12/2019, 11:30

Slow processes in physics are typically related to the existence of high (free)
energy barriers, which require strong fluctuations, or to nearly integrable
regions in the phase space, which determine a slow onset of equipartition.
In this talk we intend to discuss a different mechanism appearing in the
Discrete Nonlinear Schroedinger Equation (DNLSE), when we analyze the...

4. Current transport properties and phase diagram of a Kitaev chain with long-range pairing

Domenico Giuliano (CS)

11/12/2019, 12:00

We describe a method to probe the quantum phase transition between the short-range and the long-range topological phase in the superconducting Kitaev chain with long-range pairing. We show that, when the leads are biased at a voltage V, the Fano factor is either zero or 2e. As a result, we find that the Fano factor works as a directly measurable quantity to probe the quantum phase transition...

56. Real time dynamics, confinement and phase transitions in Z_n Schwinger-Weyl lattice models for 1+1 QED

Francesco Vincenzo Pepe (BA)

11/12/2019, 12:15

We study the out-of-equilibrium properties of (1+1)-dimensional quantum electrodynamics (QED), discretized via the staggered-fermion Schwinger model with an Abelian Z_n gauge group. We look at two relevant phenomena: first, we analyze the stability of the Dirac vacuum with respect to particle/antiparticle pair production, both spontaneous and induced by an external electric field; then, we...

19. Abelian axial anomaly in 3D semimetals

Luca Lepori (IIT Genova)

11/12/2019, 12:30

After a general introduction on
Dirac and (multi-)Weyl semimetals,
I will discuss the abelian axial anomaly
in multi-Weyl and triple-point semimetals,
commenting on its physical consequences.

Reference:

L. Lepori, M. Burrello, and E. Guadagnini, ”Axial anomaly in
multi-Weyl and triple-point semimetals”, J. High En. Phys. (2018).

6. Spin-waves and multimerization for many-body bound states in the continuum in one-dimensional qubit arrays

Domenico Pomarico (BA)

11/12/2019, 12:45

Bound states in the continuum are extensively studied both theoretically and experimentally, with the aim of implementing noiseless memories. In quantum optics, models adopted for their description make use of the dipolar interaction, representing an exactly solvable case in the one-excitation sector. We characterize the eigensystem for any number of equally spaced qubits embedded in one...

59. [NEMESYS] Research Activities, Summary of Achievements and Perspectives.

Antonio Sindona (CS)

The NEMSYS specific initiative, a condensed matter project devoted to the
fundamental physics of correlated fermion and boson systems, confined to low
dimensions, has involved about 20 researchers, from two Universities
[Universita' della Calabria (UNICAL), Universita' di Roma Tor Vergata (ToV)]
and two research institutes [Laboratori Nazionali di Frascati (LNF), Trento
Institute...