ALBERT

Description: Volcanic processes operate over a wide range of time scale that requires different instruments and techniques to be monitored. The best approach to survey a volcanic unrest is to jointly monitor all the geophysical quantities that could vary before an eruption. The monitoring techniques are sometimes peculiar for each volcano, which has its own behavior. The simultaneous investigation of all the geophysical and geochemical parameters improves the sensibility and the understanding of any variation in the volcanic system. The Osservatorio Vesuviano is the INGV division charged of the Campi Flegrei and Vesuvius monitoring, two of the highest risk volcanic complexes in the world due to the large number of people living on or close to them. Each of them have peculiarities that increase the monitoring challenge: Campi Flegrei has high anthropic noise due to people living within its numerous craters; Vesuvius has a sharp topography that complicates the data transmission and analysis. The real time monitoring of the two areas involves several geophysical fields and the data are transmitted by a wide data-communication wired or radio infrastructure to the Monitoring Centre of Osservatorio Vesuviano: - The seismic network counts of 20 station sites in Campi Flegrei and 23 in Vesuvius equipped with velocimetric, accelerometric and infrasonic sensors. Some of them are borehole stations. - The GPS network counts of 25 stations operating at Campi Flegrei caldera and 9 stations at Vesuvius volcano. All the procedures for remote stations managing (raw data downloading, data quality control and data processing) take place automatically and the computed data are shown in the Monitoring Centre. - The mareographic network counts of 4 stations in the Campi Flegrei caldera coast and 3 close to the Vesuvius that transmit to the Monitoring Centre where the data are elaborated. - The tiltmetric network consist of 10 stations distributed around Pozzuoli harbor, the area of maximum ground uplift of Campi Flegrei, evidenced since 2005, and 7 stations distributed around the Vesuvius crater. Each tiltmetric station is also equipped with a temperature and magnetic sensor. The signals recorded are sent to the Monitoring Centre. - The 4 marine multiparametric stations installed in the Pozzuoli gulf send accelerometric, broad band, hydrophonic and GPS data to the Monitoring Centre. - The geochemical network counts of 4 multiparametric stations in the fumarolic areas of Campi Flegrei and 2 stations in the Vesuvius crater (rim and bottom) with data transmission to the Monitoring Centre. They collect soil CO2 flux, temperature gradient and environmental and meteorological parameters and transmit them directly to the Monitoring Centre. - The permanent thermal infrared surveillance network (TIRNet) is composed of 6 stations distributed among Campi Flegrei and Vesuvius. The stations acquire IR scenes at night-time of highly diffuse degassing areas. IR data are processed by an automated system of IR analysis and the temperatures values are sent to the Monitoring Centre

Description: Published

Description: Vienna, Austria

Description: 1IT. Reti di monitoraggio e sorveglianza

Description: Author(s): Riccardo Bosisio, Stefano Valentini, Francesco Mazza, Giuliano Benenti, Rosario Fazio, Vittorio Giovannetti, and Fabio Taddei The overheating of microprocessors components is currently the most limiting factor in the development of information technology. This motivates the concern in finding innovative ways to control and evacuate heat in nanoscale devices. In the presence of a magnetic field B, the heat currents flowing through a generic setup exhibit reversible and irreversible components: the former are reversed when inverting B→-B, whereas the latter remain unchanged. In this work the authors exploit this feature to propose a magnetic thermal switch: a setup which allows control of the heat flow by making use of an external magnetic field as a selector of a desired working configuration. Several features, like switching on/off, inversion, partition and swap of the heat currents, can be implemented in a programmable device allowing full controllability. Among the advantages of this approach are the absence of any temperature constraints and the possibility to control phononic, in addition to electronic, heat flows. [Phys. Rev. B 91, 205420] Published Thu May 14, 2015

Description: Author(s): Victor Mukherjee, Simone Montangero, and Rosario Fazio We study the environmentally assisted local transitionless dynamics in closed spin systems driven through quantum critical points. In general the shortcut to adaiabaticity (STA) in quantum critical systems requires highly nonlocal control Hamiltonians. In this work we develop an approach to achieve … [Phys. Rev. A 93, 062108] Published Tue Jun 07, 2016

Description: Author(s): Stefano Valentini, Rosario Fazio, Vittorio Giovannetti, and Fabio Taddei We study the thermopower of a three-terminal setup composed of a quantum dot attached to three electrodes, one of which is a topological superconductor. In the model, superconductivity is explicitly taken into account. We compare the results for s-wave (trivial) and p-wave (topological) superconduct... [Phys. Rev. B 91, 045430] Published Fri Jan 23, 2015

Description: Author(s): Jiasen Jin, Vittorio Giovannetti, Rosario Fazio, Fabio Sciarrino, Paolo Mataloni, Andrea Crespi, and Roberto Osellame An all-optical scheme for simulating non-Markovian evolution of a quantum system is proposed. It uses only linear optics elements and by controlling the system parameters allows one to control the presence or absence of information backflow from the environment. A sufficient and necessary condition ... [Phys. Rev. A 91, 012122] Published Fri Jan 30, 2015

Description: Author(s): Bibek Bhandari, Giuliano Chiriacò, Paolo A. Erdman, Rosario Fazio, and Fabio Taddei We study the electronic thermal drag in two different Coulomb-coupled systems, the first one composed of two Coulomb-blockaded metallic islands and the second one consisting of two parallel quantum wires. The two conductors of each system are electrically isolated and placed in the two circuits (the... [Phys. Rev. B 98, 035415] Published Tue Jul 10, 2018

Description: Author(s): Zhong-Xiao Man, Yun-Jie Xia, and Rosario Lo Franco Quantum non-Markovianity represents memory during system dynamics, which is typically weakened by temperature. We study here the effects of environmental temperature on the non-Markovianity of an open quantum system by virtue of collision models. The environment is simulated by a chain of ancillary ... [Phys. Rev. A 97, 062104] Published Wed Jun 06, 2018

Description: Author(s): Paolo Andrea Erdman, Bibek Bhandari, Rosario Fazio, Jukka P. Pekola, and Fabio Taddei We analyze a simple implementation of an absorption refrigerator, a system that requires heat and not work to achieve refrigeration, based on two Coulomb-coupled single-electron systems. We analytically determine the general condition to achieve cooling-by-heating, and we determine the system parame... [Phys. Rev. B 98, 045433] Published Tue Jul 31, 2018

Description: Author(s): Felix A. Pollock, César Rodríguez-Rosario, Thomas Frauenheim, Mauro Paternostro, and Kavan Modi Currently, there is no systematic way to describe a quantum process with memory solely in terms of experimentally accessible quantities. However, recent technological advances mean we have control over systems at scales where memory effects are non-negligible. The lack of such an operational descrip... [Phys. Rev. A 97, 012127] Published Thu Jan 25, 2018

Description: Author(s): Francesco Mazza, Stefano Valentini, Riccardo Bosisio, Giuliano Benenti, Vittorio Giovannetti, Rosario Fazio, and Fabio Taddei In a multiterminal device the (electronic) heat and charge currents can follow different paths. In this paper we introduce and analyze a class of multiterminal devices where this property is pushed to its extreme limits, with charge and heat currents flowing in different reservoirs. After introducin… [Phys. Rev. B 91, 245435] Published Tue Jun 30, 2015