Article
Physics, Multidisciplinary
L. De Paolis, F. Napolitano, S. Bartalucci, M. Bazzi, S. Bertolucci, M. Bragadireanu, C. Capoccia, M. Cargnelli, A. Clozza, R. Del Grande, C. Fiorini, C. Guaraldo, M. Iliescu, M. Laubenstein, J. Marton, M. Miliucci, E. Milotti, K. Piscicchia, A. Porcelli, A. Scordo, H. Shi, D. L. Sirghi, F. Sirghi, F. Sgaramella, J. Zmeskal, C. Curceanu
Summary: The VIP-2 experiment is a high sensitivity test of the Pauli Exclusion Principle for electrons, conducted in the Gran Sasso Underground Laboratories. By collecting and analyzing data, the experiment has improved the previous result by one order of magnitude. Additionally, the researchers propose a diffusion random walk model that provides an enhanced description of the electron-atom close encounters process.
Review
Multidisciplinary Sciences
Ilya G. Kaplan
Summary: The Pauli exclusion principle states that particles with half-integer spin have antisymmetric wave functions, while particles with integer spin have symmetric wave functions. The total wave function can only have symmetric or antisymmetric permutation symmetry, with other symmetries being forbidden. This restriction leads to the conclusion that only particles in symmetric and antisymmetric permutation states exist in nature, with no expectation of discovering particles that do not fit into these categories in the future.
Article
Multidisciplinary Sciences
Fabrizio Napolitano, Sergio Bartalucci, Sergio Bertolucci, Massimiliano Bazzi, Mario Bragadireanu, Cesidio Capoccia, Michael Cargnelli, Alberto Clozza, Luca De Paolis, Raffaele Del Grande, Carlo Fiorini, Carlo Guaraldo, Mihail Iliescu, Matthias Laubenstein, Johann Marton, Marco Miliucci, Edoardo Milotti, Federico Nola, Kristian Piscicchia, Alessio Porcelli, Alessandro Scordo, Francesco Sgaramella, Hexi Shi, Diana Laura Sirghi, Florin Sirghi, Oton Vazquez Doce, Johann Zmeskal, Catalina Curceanu
Summary: This study aims to experimentally constrain violations of the Pauli Exclusion Principle by analyzing X-ray energies through dedicated spectroscopy, setting the strongest limit to date on PEP violation.
Article
Multidisciplinary Sciences
Edoardo Milotti, Sergio Bartalucci, Sergio Bertolucci, Massimiliano Bazzi, Mario Bragadireanu, Michael Cargnelli, Alberto Clozza, Catalina Curceanu, Luca De Paolis, Raffaele Del Grande, Carlo Guaraldo, Mihail Iliescu, Matthias Laubenstein, Johann Marton, Marco Miliucci, Fabrizio Napolitano, Kristian Piscicchia, Alessandro Scordo, Hexi Shi, Diana Laura Sirghi, Florin Sirghi, Laura Sperandio, Oton Vazquez Doce, Johann Zmeskal
Summary: The VIP-2 collaboration conducts an experiment to search for anomalous X-rays from electron-atom interactions using a Monte Carlo program. The simulation results show a potential improvement in detection sensitivity by modulating the input current.
Review
Multidisciplinary Sciences
Ronald Columbie-Leyva, Alberto Lopez-Vivas, Jacques Soullard, Ulises Miranda, Ilya G. Kaplan
Summary: This review discusses the modern achievements in studies of the Pauli exclusion principle (PEP) and the properties of identical particle systems when PEP is not fulfilled. The validity of the spin conception in the framework of density functional theory (DFT) approaches is analyzed. The current state of the recently discovered Fe-based superconductors, which belong to the paramagnetic semimetal family and become superconductors upon doping, is discussed in detail. The question of whether room-temperature superconductivity has truly been achieved remains open, as the results have not been repeated by other laboratories according to discussions in the superconductivity community.
Article
Multidisciplinary Sciences
Fabrizio Napolitano, Andrea Addazi, Angelo Bassi, Massimiliano Bazzi, Mario Bragadireanu, Michael Cargnelli, Alberto Clozza, Luca De Paolis, Raffaele Del Grande, Maaneli Derakhshani, Sandro Donadi, Carlo Fiorini, Carlo Guaraldo, Mihail Iliescu, Matthias Laubenstein, Simone Manti, Antonino Marciano, Johann Marton, Marco Miliucci, Edoardo Milotti, Kristian Piscicchia, Alessio Porcelli, Alessandro Scordo, Francesco Sgaramella, Diana Laura Sirghi, Florin Sirghi, Oton Vazquez Doce, Johann Zmeskal, Catalina Curceanu
Summary: Modern physics builds on the success of Quantum Mechanics in describing the microscopic world, but open questions about measurement and wave function collapse remain. To explore models beyond standard QM, we conduct experiments at the Italian National Gran Sasso underground Laboratory using radiation detectors. We have excluded the natural parameterless version of the Diosi-Penrose model and set strict bounds on the CSL model. Our VIP-2 experiment aims to detect violations of the Pauli Exclusion Principle in Copper and the VIP-3 experiment upgrade is planned for the near future. We also discuss the VIP-Lead experiment and its importance in constraining non-commutative quantum gravity theories.
Article
Physics, Multidisciplinary
K. Piscicchia, S. Bartalucci, S. Bertolucci, M. Bazzi, G. Borghi, M. Bragadireanu, C. Capoccia, M. Cargnelli, A. Clozza, R. Del Grande, L. De Paolis, C. Fiorini, C. Guaraldo, M. Iliescu, M. Laubenstein, J. Marton, M. Miliucci, E. Milotti, F. Napolitano, A. Porcelli, A. Scordo, H. Shi, D. L. Sirghi, F. Sirghi, F. Sgaramella, N. Zorzi, J. Zmeskal, C. Curceanu
Summary: The VIP Collaboration is conducting high sensitivity tests in an underground laboratory to study the Pauli exclusion principle for electrons. They are constantly supplying electrons to a conductive target to check its symmetric state and challenge the spin-statistics connection.
ACTA PHYSICA POLONICA A
(2022)
Article
Computer Science, Interdisciplinary Applications
Sauvik Chatterjee, Muktish Acharyya
Summary: The Lotka-Volterra model of competition was studied using numerical simulations and the Runge-Kutta-Fehlberg algorithm. Various fixed points, basins of attraction, and separatices were identified. The transient behaviors associated with reaching the stable fixed point were systematically investigated. It was found that the time required to reach the stable fixed point diverged logarithmically as the initial distance from the separatrix decreased. Additionally, metastable behavior was observed near the saddle fixed point before reaching the stable fixed point.
INTERNATIONAL JOURNAL OF MODERN PHYSICS C
(2023)
Article
Physics, Multidisciplinary
J. C. Garrison
Summary: The empirical rule in quantum mechanics states that systems of identical particles always obey Bose or Fermi statistics. This rule is typically added to the axioms of nonrelativistic quantum mechanics, excluding other statistical behaviors a priori. However, a more general approach considers what other many-particle statistics are consistent with the indistinguishability of identical particles. This strategy allows for the discussion of possible violations of the Pauli Exclusion Principle and raises interesting issues related to state preparation and the permutation group's invariance.
FOUNDATIONS OF PHYSICS
(2022)