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8 results on '"Scordo Alessandro"'

1. High Precision X-ray Measurements 2021.

Author

Scordo, Alessandro

Subjects
X-rays, NUCLEAR physics, NUCLEAR counters, CONFOCAL fluorescence microscopy, IMAGING systems, FREE electron lasers, ELECTRON beams, X-ray imaging
Abstract

10.3390/condmat6040041 7 Begani Provinciali G., Piponnier M., Oudjedi L., Levecq X., Harms F., Cedola A., de La Rochefoucauld O., Zeitoun P. High-Sensitivity X-ray Phase Imaging System Based on a Hartmann Wavefront Sensor. A high sensitivity X-ray phase imaging system based on a Harmann Wavefront Sensor is presented in [[7]], where also possible materials characterization and medical applications are reported. Contributions range from the description of new X-ray facilities to computational and analytical methods, data reconstruction algorithms, theoretical models, X-ray detectors characterization and their applications in different fields, Monte Carlo and/or ray-tracing simulations. [Extracted from the article]

Published
2022
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2. Quantum mechanics under X-rays in the Gran Sasso underground laboratory.

Author

Curceanu, Catalina, Sirghi, Diana, Sirghi, Florin, Bartalucci, Sergio, Bazzi, Massimiliano, Clozza, Alberto, De Paolis, Luca, Guaraldo, Carlo, Iliescu, Mihai, Miliucci, Marco, Pietreanu, Dorel, Scordo, Alessandro, Shi, Hexi, Sperandio, Laura, Bassi, Angelo, Donadi, Sandro, Milotti, Edoardo, Bertolucci, Sergio, Bragadireanu, Mario, and Cargnelli, Michael

Subjects
QUANTUM mechanics, BAYESIAN analysis, PARAMETER estimation, ELECTRON spin states, NUCLEAR counters
Abstract

By performing X-ray measurements in the 'cosmic silence' of the underground laboratory of Gran Sasso, LNGS-INFN, we test a basic principle of quantum mechanics: the Pauli Exclusion Principle (PEP) for electrons. We present the achieved results of the VIP experiment and the ongoing VIP2 measurement aiming to gain two orders of magnitude improvement in testing PEP. X-ray emission can also be used to put strong constraints on the parameters of the Continuous Spontaneous Localization Model, which was introduced as a possible solution to the measurement problem in Quantum Mechanics. A Bayesian analysis of the data collected by IGEX will be presented, which allows to exclude a broad region of the parameter space which characterizes this model. [ABSTRACT FROM AUTHOR]

Published
2017
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3. Semi-Analytical Monte Carlo Method to Simulate the Signal of the VIP-2 Experiment.

Author

Milotti, Edoardo, Bartalucci, Sergio, Bertolucci, Sergio, Bazzi, Massimiliano, Bragadireanu, Mario, Cargnelli, Michael, Clozza, Alberto, Curceanu, Catalina, De Paolis, Luca, Del Grande, Raffaele, Guaraldo, Carlo, Iliescu, Mihail, Laubenstein, Matthias, Marton, Johann, Miliucci, Marco, Napolitano, Fabrizio, Piscicchia, Kristian, Scordo, Alessandro, Shi, Hexi, and Sirghi, Diana Laura

Subjects
MONTE Carlo method, NUCLEAR physics, ELECTRON sources
Abstract

The VIP-2 collaboration runs an apparatus in the Gran Sasso underground laboratories of the Italian Institute for Nuclear Physics (INFN) designed to search for anomalous X-rays from electron-atom interactions due to violations of the fundamental antisymmetry of multi-electron wavefunctions. The experiment implements the scheme first proposed by Ramberg and Snow, where a current source injects electrons into a metal strip (the experiment's target). In this paper we describe the structure of a Monte Carlo program to simulate a new upgrade of the experiment, where the anomalous X-ray emission is modulated by an arbitrary time-varying input current. A novel feature of the simulation algorithm is that the Monte Carlo program is based on a mixture of analytical and numerical methods. We report preliminary, exploratory results on the expected detection rate for different modulations of the injected current; these results are a starting point on the way to optimize the modulation scheme and indicate a large potential improvement of the detection sensitivity. [ABSTRACT FROM AUTHOR]

Published
2021
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4. On the Importance of Electron Diffusion in a Bulk-Matter Test of the Pauli Exclusion Principle.

Author

Milotti, Edoardo, Bartalucci, Sergio, Bertolucci, Sergio, Bazzi, Massimiliano, Bragadireanu, Mario, Cargnelli, Michael, Clozza, Alberto, Curceanu, Catalina, De Paolis, Luca, Egger, Jean-Pierre, Guaraldo, Carlo, Iliescu, Mihail, Laubenstein, Matthias, Marton, Johann, Miliucci, Marco, Pichler, Andreas, Pietreanu, Dorel, Piscicchia, Kristian, Scordo, Alessandro, and Shi, Hexi

Subjects
ELECTRON diffusion, PAULI exclusion principle, CONDUCTION electrons, ELECTROMAGNETISM, GROUND state (Quantum mechanics)
Abstract

The VIolation of Pauli (VIP) experiment (and its upgraded version, VIP-2) uses the Ramberg and Snow (RS) method (Phys. Lett. B 1990, 238, 438) to search for violations of the Pauli exclusion principle in the Gran Sasso underground laboratory. The RS method consists of feeding a copper conductor with a high direct current, so that the large number of newly-injected conduction electrons can interact with the copper atoms and possibly cascade electromagnetically to an already occupied atomic ground state if their wavefunction has the wrong symmetry with respect to the atomic electrons, emitting characteristic X-rays as they do so. In their original data analysis, RS considered a very simple path for each electron, which is sure to return a bound, albeit a very weak one, because it ignores the meandering random walks of the electrons as they move from the entrance to the exit of the copper sample. These complex walks bring the electrons close to many more atoms than in the RS calculation. Here, we consider the full description of these walks and show that this leads to a nontrivial and nonlinear X-ray emission rate. Finally, we obtain an improved bound, which sets much tighter constraints on the violation of the Pauli exclusion principle for electrons. [ABSTRACT FROM AUTHOR]

Published
2018
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5. On the Importance of Electron Diffusion in a Bulk-Matter Test of the Pauli Exclusion Principle

Author

Hexi Shi, M. Cargnelli, Luca De Paolis, K. Piscicchia, Alberto Clozza, Sergio Bartalucci, Marco Miliucci, Florin Sirghi, J. P. Egger, Matthias Laubenstein, Edoardo Milotti, D. Pietreanu, Johann Zmeskal, A. Pichler, Oton Vazquez Doce, Sergio Bertolucci, Laura Sperandio, Alessandro Scordo, Eberhard Widmann, Diana Sirghi, M. Iliescu, C. Guaraldo, Catalina Curceanu, J. Marton, Mario Bragadireanu, Massimiliano Bazzi, Milotti, Edoardo, Bartalucci, Sergio, Bertolucci, Sergio, Bazzi, Massimiliano, Bragadireanu, Mario, Cargnelli, Michael, Clozza, Alberto, Curceanu, Catalina, De Paolis, Luca, Egger, Jean-Pierre, Guaraldo, Carlo, Iliescu, Mihail, Laubenstein, Matthia, Marton, Johann, Miliucci, Marco, Pichler, Andrea, Pietreanu, Dorel, Piscicchia, Kristian, Scordo, Alessandro, Shi, Hexi, Sirghi, Diana, Sirghi, Florin, Sperandio, Laura, Vázquez Doce, Oton, Widmann, Eberhard, and Zmeskal, Johann

Subjects
General Physics and Astronomy, lcsh:Astrophysics, Electron, 01 natural sciences, Article, X-ray, Pauli exclusion principle, symbols.namesake, Quantum mechanics, lcsh:QB460-466, 0103 physical sciences, Atom, X-rays, lcsh:Science, 010306 general physics, Wave function, Physics, diffusion processes, fundamental symmetries, 010308 nuclear & particles physics, Thermal conduction, Random walk, lcsh:QC1-999, Symmetry (physics), symbols, lcsh:Q, diffusion processe, Ground state, lcsh:Physics
Abstract

The VIolation of Pauli (VIP) experiment (and its upgraded version, VIP-2) uses the Ramberg and Snow (RS) method (Phys. Lett. B 1990, 238, 438) to search for violations of the Pauli exclusion principle in the Gran Sasso underground laboratory. The RS method consists of feeding a copper conductor with a high direct current, so that the large number of newly-injected conduction electrons can interact with the copper atoms and possibly cascade electromagnetically to an already occupied atomic ground state if their wavefunction has the wrong symmetry with respect to the atomic electrons, emitting characteristic X-rays as they do so. In their original data analysis, RS considered a very simple path for each electron, which is sure to return a bound, albeit a very weak one, because it ignores the meandering random walks of the electrons as they move from the entrance to the exit of the copper sample. These complex walks bring the electrons close to many more atoms than in the RS calculation. Here, we consider the full description of these walks and show that this leads to a nontrivial and nonlinear X-ray emission rate. Finally, we obtain an improved bound, which sets much tighter constraints on the violation of the Pauli exclusion principle for electrons.

Published
2018

6. The X-ray machine for the examination of quantum mechanics

Author

C. Guaraldo, Johann Marton, Sandro Donadi, A. Pichler, Matthias Laubenstein, Michael Cargnelli, Florin Sirghi, Carolina Berucci, M. Iliescu, Sergio Di Matteo, Alberto Clozza, Catalina Curceanu, Dorel Pietreanu, A. d'Uffizi, Oton Vazquez Doce, Sergio Bertolucci, Jean Pierre Egger, Kristian Piscicchia, Alessandro Scordo, Massimiliano Bazzi, T. Ponta, A. M. Bragadireanu, Luca De Paolis, Hexi Shi, Sergio Bartalucci, Johann Zmeskal, Diana Sirghi, Edoardo Milotti, Laura Sperandio, Angelo Bassi, Laboratori Nazionali di Frascati (LNF), Istituto Nazionale di Fisica Nucleare (INFN), Horia Hulubei National Institute of Physics and Nuclear Engineering (NIPNE), IFIN-HH, Enrico Fermi Center for Study and Research | Museo Storico della Fisica e Centro Studi e Ricerche Enrico Fermi, Dipartimento di Fisica [Trieste], Università degli studi di Trieste = University of Trieste, Stefan Meyer Institut für subatomare Physik (SMI), Institut de Physique de Rennes (IPR), Université de Rennes (UR)-Centre National de la Recherche Scientifique (CNRS), Université de Neuchâtel (UNINE), Laboratori Nazionali del Gran Sasso (LNGS), National Institut for Nuclear Physics and Engineering (IFIN HH), National Institut for Nuclear Physics and Engineering, Centro Studi e Ricerche 'Enrico Fermi' (Centro Fermi), Centro Studi e Ricerche e Museo Storico Della Fisica, Università degli studi di Trieste, Université de Rennes 1 (UR1), Université de Rennes (UNIV-RENNES)-Université de Rennes (UNIV-RENNES)-Centre National de la Recherche Scientifique (CNRS), Curceanu, Catalina, Bartalucci, Sergio, Bassi, Angelo, Bazzi, Massimiliano, Bertolucci, Sergio, Berucci, Carolina, Bragadireanu, Alexandru Mario, Cargnelli, Michael, Clozza, Alberto, De Paolis, Luca, Di Matteo, Sergio, Donadi, Sandro, D'Uffizi, Alessandro, Egger, Jean Pierre, Guaraldo, Carlo, Iliescu, Mihail, Laubenstein, Matthia, Marton, Johann, Milotti, Edoardo, Pichler, Andrea, Pietreanu, Dorel, Piscicchia, Kristian, Ponta, Titu, Scordo, Alessandro, Shi, Hexi, Sirghi, Diana, Sirghi, Florin, Sperandio, Laura, Doce, Oton Vazquez, and Zmeskal, Johann

Subjects
[PHYS]Physics [physics], Physics, Physics and Astronomy (miscellaneous), Spin-statistic, 010308 nuclear & particles physics, collapse models, 01 natural sciences, Signature (logic), X-ray, Spin-statistics, X-rays, symbols.namesake, Pauli exclusion principle, Quantum mechanics, 0103 physical sciences, symbols, Underground laboratory, collapse model, 010306 general physics, Wave function collapse, Order of magnitude
Abstract

International audience; By performing X-rays measurements in the underground laboratory of Gran Sasso, LNGS-INFN, we test a basic principle of quantum mechanics: the Pauli exclusion principle (PEP). In the future, we aim to use a similar experimental technique to search for X-rays as a signature of the spontaneous collapse of the wave function predicted by continuous spontaneous localization theories. We present the achieved results of the VIP experiment and the future plans to gain two orders of magnitude in testing PEP with the recently VIP2 setup installed at Gran Sasso. © 2016 World Scientific Publishing Company.

Published
2016

7. Hunting the 'impossible atoms' Pauli exclusion principle violation and spontaneous collapse of the wave function at test

Author

Hexi Shi, A. d'Uffizi, Johann Zmeskal, J.-P. Egger, Kristian Piscicchia, M. Iliescu, T. Ponta, Johann Marton, Angelo Bassi, T. Ishiwatari, C. Guaraldo, A. M. Bragadireanu, Oton Vazquez Doce, Alessandro Scordo, Diana Sirghi, Florin Sirghi, Sergio Bartalucci, Sandro Donadi, Matthias Laubenstein, Dorel Pietreanu, Carolina Berucci, Emanuele Sbardella, Alberto Clozza, Michael Cargnelli, Catalina Curceanu, Edoardo Milotti, Sergio Bertolucci, Laura Sperandio, Sergio Di Matteo, Curceanu, Catalina, Bartalucci, Sergio, Bassi, Angelo, Bertolucci, Sergio, Berucci, Carolina, Bragadireanu, Alexandru Mario, Cargnelli, Michael, Clozza, Alberto, Di Matteo, Sergio, Donadi, Sandro, D'Uffizi, Alessandro, Egger, J. P., Guaraldo, Carlo, Iliescu, Mihail, Ishiwatari, Tomoichi, Laubenstein, Matthia, Marton, Johann, Milotti, Edoardo, Pietreanu, Dorel, Piscicchia, Kristian, Ponta, Titu, Sbardella, Emanuele, Scordo, Alessandro, Shi, Hexi, Sirghi, Diana, Sirghi, Florin, Sperandio, Laura, Doce, Oton Vazquez, and Zmeskal, Johann

Subjects
Physics, Physics and Astronomy (miscellaneous), Basis (linear algebra), media_common.quotation_subject, collapse models, Electron, Universe, Spin-statistics, collapse models, X-rays, symbols.namesake, Pauli exclusion principle, Quantum mechanics, Atom, X-rays, symbols, Physics::Accelerator Physics, High Energy Physics::Experiment, Limit (mathematics), Experimental methods, Spin-statistics, Wave function collapse, media_common
Abstract

The Pauli exclusion principle (PEP) and, more generally, the spin-statistics connection, are at the very basis of our understanding of matter, life and Universe. The PEP spurs, presently, a lively debate on its possible limits, deeply rooted in the very foundations of Quantum Mechanics. It is, therefore, extremely important to test the limits of its validity. The Violation of the PEP (VIP) experiment established the best limit on the probability that PEP is violated by electrons, using the method of searching for PEP forbidden atomic transitions in copper. We describe the experimental method, the obtained results, and plans to go beyond the actual limit by upgrading the experimental apparatus. We discuss the possibility of using a similar experimental technique to search for X-rays as a signature of the spontaneous collapse of the wave function predicted by continuous spontaneous localization (CSL) theories.

Published
2014

8. Semi-Analytical Monte Carlo Method to Simulate the Signal of the VIP-2 Experiment

Author

Edoardo Milotti, Sergio Bartalucci, Oton Vazquez Doce, Raffaele Del Grande, Laura Sperandio, Marco Miliucci, Johann Zmeskal, Johann Marton, C. Guaraldo, Hexi Shi, Florin Sirghi, Alessandro Scordo, Mario Bragadireanu, M. Iliescu, Matthias Laubenstein, Diana Sirghi, Sergio Bertolucci, Fabrizio Napolitano, Massimiliano Bazzi, Luca De Paolis, Kristian Piscicchia, Alberto Clozza, Catalina Curceanu, Michael Cargnelli, Milotti, Edoardo, Bartalucci, Sergio, Bertolucci, Sergio, Bazzi, Massimiliano, Bragadireanu, Mario, Cargnelli, Michael, Clozza, Alberto, Curceanu, Catalina, De Paolis, Luca, Del Grande, Raffaele, Guaraldo, Carlo, Iliescu, Mihail, Laubenstein, Matthia, Marton, Johann, Miliucci, Marco, Napolitano, Fabrizio, Piscicchia, Kristian, Scordo, Alessandro, Shi, Hexi, Sirghi, Diana Laura, Sirghi, Florin, Sperandio, Laura, Doce, Oton Vázquez, and Zmeskal, Johann

Subjects
Physics and Astronomy (miscellaneous), Physics::Instrumentation and Detectors, General Mathematics, Monte Carlo method, 01 natural sciences, Signal, 010305 fluids & plasmas, Pauli exclusion principle, X-ray, 0103 physical sciences, Modulation (music), X-rays, Computer Science (miscellaneous), Point (geometry), Sensitivity (control systems), 010306 general physics, Nuclear Experiment, Physics, diffusion processes, fundamental symmetries, Numerical analysis, lcsh:Mathematics, Current source, lcsh:QA1-939, Computational physics, Upgrade, Chemistry (miscellaneous), High Energy Physics::Experiment, diffusion processe
Abstract

The VIP-2 collaboration runs an apparatus in the Gran Sasso underground laboratories of the Italian Institute for Nuclear Physics (INFN) designed to search for anomalous X-rays from electron-atom interactions due to violations of the fundamental antisymmetry of multi-electron wavefunctions. The experiment implements the scheme first proposed by Ramberg and Snow, where a current source injects electrons into a metal strip (the experiment&rsquo, s target). In this paper we describe the structure of a Monte Carlo program to simulate a new upgrade of the experiment, where the anomalous X-ray emission is modulated by an arbitrary time-varying input current. A novel feature of the simulation algorithm is that the Monte Carlo program is based on a mixture of analytical and numerical methods. We report preliminary, exploratory results on the expected detection rate for different modulations of the injected current, these results are a starting point on the way to optimize the modulation scheme and indicate a large potential improvement of the detection sensitivity.

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