15 results on '"Guaraldo, Carlo"'
Search Results
2. Underground Tests of Quantum Mechanics by the VIP Collaboration at Gran Sasso.
- Author
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Napolitano, Fabrizio, Addazi, Andrea, Bassi, Angelo, Bazzi, Massimiliano, Bragadireanu, Mario, Cargnelli, Michael, Clozza, Alberto, De Paolis, Luca, Del Grande, Raffaele, Derakhshani, Maaneli, Donadi, Sandro, Fiorini, Carlo, Guaraldo, Carlo, Iliescu, Mihail, Laubenstein, Matthias, Manti, Simone, Marcianò, Antonino, Marton, Johann, Miliucci, Marco, and Milotti, Edoardo
- Subjects
QUANTUM mechanics ,NUCLEAR counters ,ENGINEERING standards ,ATOMIC transitions ,GERMANIUM detectors ,QUANTUM gravity - Abstract
Modern physics lays its foundations on the pillars of Quantum Mechanics (QM), which has been proven successful to describe the microscopic world of atoms and particles, leading to the construction of the Standard Model. Despite the big success, the old open questions at its very heart, such as the measurement problem and the wave function collapse, are still open. Various theories consider scenarios which could encompass a departure from the predictions of the standard QM, such as extra-dimensions or deformations of the Lorentz/Poincaré symmetries. At the Italian National Gran Sasso underground Laboratory LNGS, we search for evidence of new physics proceeding from models beyond standard QM, using radiation detectors. Collapse models addressing the foundations of QM, such as the gravity-related Diósi–Penrose (DP) and Continuous Spontaneous Localization (CSL) models, predict the emission of spontaneous radiation, which allows experimental tests. Using a high-purity Germanium detector, we could exclude the natural parameterless version of the DP model and put strict bounds on the CSL one. In addition, forbidden atomic transitions could prove a possible violation of the Pauli Exclusion Principle (PEP) in open and closed systems. The VIP-2 experiment is currently in operation, aiming at detecting PEP-violating signals in Copper with electrons; the VIP-3 experiment upgrade is foreseen to become operative in the next few years. We discuss the VIP-Lead experiment on closed systems, and the strong bounds it sets on classes of non-commutative quantum gravity theories, such as the θ –Poincaré theory. [ABSTRACT FROM AUTHOR]
- Published
- 2023
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- View/download PDF
3. Analysis methods used and planned for VIP-2.
- Author
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Porcelli, Alessio, Bartalucci, Sergio, Bertolucci, Sergio, Bazzi, Massimiliano, Bragadireanu, Mario, Capoccia, Cesidio, Cargnelli, Michael, Clozza, Alberto, Curceanu, Catalina, De Paolis, Luca, Del Grande, Raffaele, Fiorini, Carlo, Guaraldo, Carlo, Iliescu, Mihai, Laubenstein, Matthias, Marton, Johann, Miliucci, Marco, Milotti, Edoardo, Napolitano, Fabrizio, and Piscicchia, Kristian
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QUANTUM gravity ,PAULI exclusion principle ,ELECTRON configuration ,PARTICLE physics ,QUANTUM principles - Abstract
VIP-2 (VIolation of Pauli exclusion principle - 2) is an underground experiment sited in the underground "Laboratori Nazionali del Gran Sasso." It aims to investigate possible violations of the Pauli Exclusion Principle (PEP) and, in this context, Quantum Gravity models implying violations of PEP. While an upper limit of PEP violation probability is recently published, the data requires further developments of accurate analysis techniques and methods. In this contribution, we present an overview of the methodologies proposed for current and planned analysis. [ABSTRACT FROM AUTHOR]
- Published
- 2022
- Full Text
- View/download PDF
4. Testing the Pauli Exclusion Principle with the VIP-2 Experiment.
- Author
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Napolitano, Fabrizio, Bartalucci, Sergio, Bertolucci, Sergio, Bazzi, Massimiliano, Bragadireanu, Mario, Capoccia, Cesidio, Cargnelli, Michael, Clozza, Alberto, De Paolis, Luca, Del Grande, Raffaele, Fiorini, Carlo, Guaraldo, Carlo, Iliescu, Mihail, Laubenstein, Matthias, Marton, Johann, Miliucci, Marco, Milotti, Edoardo, Nola, Federico, Piscicchia, Kristian, and Porcelli, Alessio
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ATOMIC transitions ,STANDARD model (Nuclear physics) ,LORENTZ invariance ,SILICON detectors ,X-ray spectroscopy ,COPPER powder - Abstract
Violations of the Pauli Exclusion Principle (PEP), albeit small, could be motivated by physics beyond the Standard Model, ranging from violation of Lorentz invariance to extra space dimensions. This scenario can be experimentally constrained through dedicated, state-of-the-art X-ray spectroscopy, searching for a forbidden atomic transition from the L shell to the K shell already occupied by two electrons. The VIP-2 Experiment located at the underground Gran Sasso National Laboratories of INFN (Italy) tests PEP violations by introducing new electrons via a direct current in a copper conductor, measuring the X-ray energies through a silicon drift detector. Bayesian and frequentist analyses of approximately six months of data taken with the fully operational setup is presented, setting the strongest limit to date on the PEP violation shown by the VIP collaboration. The upper bound on PEP violation are placed at 90% CL β 2 / 2 ≤ 6.8 × 10 − 42 with the Bayesian approach, and β 2 / 2 ≤ 7.1 × 10 − 42 with the frequentist CL
s technique. [ABSTRACT FROM AUTHOR]- Published
- 2022
- Full Text
- View/download PDF
5. Test of the Pauli Exclusion Principle in the VIP-2 Underground Experiment.
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Curceanu, Catalina, Hexi Shi, Bartalucci, Sergio, Bertolucci, Sergio, Bazzi, Massimiliano, Berucci, Carolina, Bragadireanu, Mario, Cargnelli, Michael, Clozza, Alberto, De Paolis, Luca, Di Matteo, Sergio, Egger, Jean-Pierre, Guaraldo, Carlo, Iliescu, Mihail, Marton, Johann, Laubenstein, Matthias, Milotti, Edoardo, Miliucci, Marco, Pichler, Andreas, and Pietreanu, Dorel
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PARTICLE physics ,QUANTUM mechanics ,ELECTRON configuration ,PAULI exclusion principle ,GROUND state (Quantum mechanics) ,ENERGY levels (Quantum mechanics) - Abstract
The validity of the Pauli exclusion principle-a building block of Quantum Mechanics-is tested for electrons. The VIP (violation of Pauli exclusion principle) and its follow-up VIP-2 experiments at the Laboratori Nazionali del Gran Sasso search for X-rays from copper atomic transitions that are prohibited by the Pauli exclusion principle. The candidate events-if they exist-originate from the transition of a 2p orbit electron to the ground state which is already occupied by two electrons. The present limit on the probability for Pauli exclusion principle violation for electrons set by the VIP experiment is 4.7 ×10
-29 . We report a first result from the VIP-2 experiment improving on the VIP limit, which solidifies the final goal of achieving a two orders of magnitude gain in the long run. [ABSTRACT FROM AUTHOR]- Published
- 2017
- Full Text
- View/download PDF
6. The X-ray machine for the examination of quantum mechanics.
- Author
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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, Matthias, Marton, Johann, Milotti, Edoardo, and Pichler, Andreas
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QUANTUM mechanics ,PAULI exclusion principle ,WAVE functions ,LOCALIZATION (Mathematics) ,X-rays - Abstract
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. [ABSTRACT FROM AUTHOR]
- Published
- 2016
- Full Text
- View/download PDF
7. Hunting the "impossible atoms" Pauli exclusion principle violation and spontaneous collapse of the wave function at test.
- Author
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Curceanu, Catalina, Bartalucci, Sergio, Bassi, Angelo, Bertolucci, Sergio, Berucci, Carolina, Bragadireanu, Alexandru Mario, Cargnelli, Michael, Clozza, Alberto, Di Matteo, Sergio, Donadi, S., D'uffizi, Alessandro, Egger, J.-P., Guaraldo, Carlo, Iliescu, Mihail, Ishiwatari, Tomoichi, Laubenstein, Matthias, Marton, Johann, Milotti, Edoardo, Pietreanu, Dorel, and Piscicchia, Kristian
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PAULI exclusion principle ,WAVE functions ,QUANTUM mechanics ,PROBABILITY theory ,ELECTRONS ,X-rays - 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. [ABSTRACT FROM AUTHOR]
- Published
- 2014
- Full Text
- View/download PDF
8. Semi-Analytical Monte Carlo Method to Simulate the Signal of the VIP-2 Experiment.
- Author
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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
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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
- Full Text
- View/download PDF
9. On the Importance of Electron Diffusion in a Bulk-Matter Test of the Pauli Exclusion Principle.
- Author
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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
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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
- Full Text
- View/download PDF
10. High Precision Test of the Pauli Exclusion Principle for Electrons
- Author
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Matthias Laubenstein, M. Iliescu, Laura Sperandio, Johann Marton, Hexi Shi, Sergio Bartalucci, Michael Cargnelli, A. Pichler, Marco Miliucci, J. P. Egger, Dorel Pietreanu, Alberto Clozza, Diana Sirghi, Carlo Fiorini, Kristian Piscicchia, Florin Sirghi, Sergio Bertolucci, Raffaele Del Grande, Massimiliano Bazzi, Mario Bragadireanu, Alessandro Scordo, Luca De Paolis, Oton Vazquez Doce, Johann Zmeskal, Catalina Curceanu, A. Amirkhani, C. Guaraldo, Edoardo Milotti, Piscicchia, Kristian, Amirkhani, Aidin, Bartalucci, Sergio, Bertolucci, Sergio, Bazzi, Massimiliano, Bragadireanu, Mario, Cargnelli, Michael, Clozza, Alberto, Curceanu, Catalina, Del Grande, Raffaele, De Paolis, Luca, Egger, Jean-Pierre, Fiorini, Carlo, Guaraldo, Carlo, Iliescu, Mihail, Laubenstein, Matthia, Marton, Johann, Miliucci, Marco, Milotti, Edoardo, Pichler, Andrea, Pietreanu, Dorel, Scordo, Alessandro, Shi, Hexi, Sirghi, Diana Laura, Sirghi, Florin, Sperandio, Laura, Doce, Oton Vazquez, and Zmeskal, Johann
- Subjects
quantum foundation ,Particle physics ,02 engineering and technology ,Electron ,01 natural sciences ,010305 fluids & plasmas ,Pauli exclusion principle ,symbols.namesake ,Radiation emission ,0103 physical sciences ,0202 electrical engineering, electronic engineering, information engineering ,Limit (mathematics) ,Physics ,Condensed Matter Physics ,lcsh:QC1-999 ,quantum foundations ,Electronic, Optical and Magnetic Materials ,underground experiment ,symbols ,X-ray spectroscopy ,020201 artificial intelligence & image processing ,Continuous current ,Order of magnitude ,lcsh:Physics - Abstract
The VIP-2 experiment aims to perform high precision tests of the Pauli Exclusion Principle for electrons. The method consists in circulating a continuous current in a copper strip, searching for the X radiation emission due to a prohibited transition (from the 2p level to the 1s level of copper when this is already occupied by two electrons). VIP already set the best limit on the PEP violation probability for electrons 1 2 &beta, 2 <, 4.7 ×, 10 &minus, 29 , the goal of the upgraded VIP-2 (VIolation of the Pauli Exclusion Principle-2) experiment is to improve this result of two orders of magnitude at least. The experimental apparatus and the results of the analysis of a first set of collected data will be presented.
- Published
- 2019
- Full Text
- View/download PDF
11. On the Importance of Electron Diffusion in a Bulk-Matter Test of the Pauli Exclusion Principle
- Author
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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
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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
12. Test of the Pauli Exclusion Principle in the VIP-2 Underground Experiment
- Author
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Mario Bragadireanu, Diana Sirghi, Massimiliano Bazzi, Florin Sirghi, Johann Zmeskal, Marco Miliucci, Luca De Paolis, Sergio Di Matteo, C. Guaraldo, Edoardo Milotti, Oton Vazquez Doce, Kristian Piscicchia, Matthias Laubenstein, Dorel Pietreanu, Alberto Clozza, Eberhard Widmann, Laura Sperandio, Alessandro Scordo, M. Iliescu, Sergio Bertolucci, Johann Marton, Michael Cargnelli, A. Pichler, J. P. Egger, Hexi Shi, Sergio Bartalucci, Catalina Curceanu, Carolina Berucci, Laboratori Nazionali di Frascati dell’INFN, Istituto Nazionale di Fisica Nucleare (INFN), Institut de Physique de Rennes (IPR), Université de Rennes 1 (UR1), Université de Rennes (UNIV-RENNES)-Université de Rennes (UNIV-RENNES)-Centre National de la Recherche Scientifique (CNRS), Austrian Science Foundation (FWF) [P25529-N20], EU COST Action [CA15220], Centro Fermi (' Problemi aperti nella meccania quantistica' project), John Templeton Foundation [58158], Curceanu, Catalina, Shi, Hexi, Bartalucci, Sergio, Bertolucci, Sergio, Bazzi, Massimiliano, Berucci, Carolina, Bragadireanu, Mario, Cargnelli, Michael, Clozza, Alberto, De Paolis, Luca, Di Matteo, Sergio, Egger, Jean Pierre, Guaraldo, Carlo, Iliescu, Mihail, Marton, Johann, Laubenstein, Matthia, Milotti, Edoardo, Miliucci, Marco, Pichler, Andrea, Pietreanu, Dorel, Piscicchia, Kristian, Scordo, Alessandro, Sirghi, Diana, Sirghi, Florin, Sperandio, Laura, Vazquez Doce, Oton, Widmann, Eberhard, Zmeskal, Johann, and Université de Rennes (UR)-Centre National de la Recherche Scientifique (CNRS)
- Subjects
quantum foundation ,Particle physics ,Physics - Instrumentation and Detectors ,FOS: Physical sciences ,General Physics and Astronomy ,Electron ,x-ray spectroscopy ,01 natural sciences ,Pauli exclusion principle ,symbols.namesake ,silicon drift detector ,0103 physical sciences ,Limit (mathematics) ,010306 general physics ,Quantum ,Physics ,[PHYS]Physics [physics] ,Quantum Physics ,010308 nuclear & particles physics ,Instrumentation and Detectors (physics.ins-det) ,quantum foundations ,X-ray spectroscopy ,underground experiment ,symbols ,Orbit (control theory) ,Quantum Physics (quant-ph) ,Ground state ,pauli exclusion principle - Abstract
The validity of the Pauli Exclusion Principle, a building block of Quantum Mechanics, is tested for electrons. The VIP (VIolation of Pauli exclusion principle) and its follow-up VIP-2 experiments at the Laboratori Nazionali del Gran Sasso search for x-rays from copper atomic transition that are prohibited by the Pauli Exclusion Principle. The candidate events, if they exist, originate from the transition of a $2p$ orbit electron to the ground state which is already occupied by two electrons. The present limit on the probability for Pauli Exclusion Principle violation for electrons set by the VIP experiment is 4.7 $\times$ 10 $^{-29}$. We report a first result from the VIP-2 experiment improving on the VIP limit, that solidifies the final goal to achieve a two order of magnitude gain in the long run., Comment: 6 pages, 3 figures. Submitted to journal Entropy special issue: "Quantum Information and Foundations", 2017
- Published
- 2017
13. The X-ray machine for the examination of quantum mechanics
- Author
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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
14. Hunting the 'impossible atoms' Pauli exclusion principle violation and spontaneous collapse of the wave function at test
- Author
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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
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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
15. Semi-Analytical Monte Carlo Method to Simulate the Signal of the VIP-2 Experiment
- Author
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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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