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Test of the Pauli Exclusion Principle in the VIP-2 Underground Experiment

Laboratori Nazionali di Frascati, INFN, I-00044 Frascati, Italy
CENTRO FERMI - Museo Storico della Fisica e Centro Studi e Ricerche ‘Enrico Fermi’, I-00184 Rome, Italy
Institutul National pentru Fizica si Inginerie Nucleara Horia Hulubbei, IFIN-HH, R-077125 Magurele, Romania
Stefan-Meyer-Institute for Subatomic Physics, Austrian Academy of Science, A-1090 Vienna, Austria
Dipartimento di Fisica e Astronomia, Universitá di Bologna, I-40127 Bologna, Italy
Institut de Physique UMR CNRS-UR1 6251, Université de Rennes1, F-35042 Rennes, France
Institut de Physique, Université de Neuchâtel, CH-2000 Neuenburg, Switzerland
Laboratori Nazionali del Gran Sasso, INFN, I-67100 Assergi L’Aquila, Italy
Dipartimento di Fisica, Universitá di Trieste and INFN-Sezione di Trieste, I-34127 Trieste, Italy
Excellence Cluster Universe, Technische Universität München, D-85748 Garching, Germany
Authors to whom correspondence should be addressed.
Current address: Laboratori Nazionali di Frascati, INFN, Via E. Fermi 40, I-00044, Frascati, Italy.
These authors contributed equally to this work.
This paper is an extended version of our paper published in the XIV International Conference on Topics in Astroparticle and Underground Physics (TAUP2015), 7–11 September 2015, Torino, Italy.
Entropy 2017, 19(7), 300;
Received: 29 April 2017 / Revised: 6 June 2017 / Accepted: 22 June 2017 / Published: 24 June 2017
(This article belongs to the Special Issue Quantum Information and Foundations)
PDF [1292 KB, uploaded 28 June 2017]


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 2 p 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. View Full-Text
Keywords: Pauli exclusion principle; quantum foundations; X-ray spectroscopy; underground experiment; silicon drift detector Pauli exclusion principle; quantum foundations; X-ray spectroscopy; underground experiment; silicon drift detector

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Curceanu, C.; Shi, H.; Bartalucci, S.; Bertolucci, S.; Bazzi, M.; Berucci, C.; Bragadireanu, M.; Cargnelli, M.; Clozza, A.; De Paolis, L.; Di Matteo, S.; Egger, J.-P.; Guaraldo, C.; Iliescu, M.; Marton, J.; Laubenstein, M.; Milotti, E.; Miliucci, M.; Pichler, A.; Pietreanu, D.; Piscicchia, K.; Scordo, A.; Sirghi, D.L.; Sirghi, F.; Sperandio, L.; Vazquez Doce, O.; Widmann, E.; Zmeskal, J. Test of the Pauli Exclusion Principle in the VIP-2 Underground Experiment. Entropy 2017, 19, 300.

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