Testing Bell Inequalities at the LHC with Top-Quark Pairs
Open Access
- 15 October 2021
- journal article
- research article
- Published by American Physical Society (APS) in Physical Review Letters
- Vol. 127 (16), 161801
- https://doi.org/10.1103/physrevlett.127.161801
Abstract
Correlations between the spins of top-quark pairs produced at a collider can be used to probe quantum entanglement at energies never explored so far. We show how the measurement of a single observable can provide a test of the violation of a Bell inequality at the 98% C.L. with the statistical uncertainty of the data already collected at the Large Hadron Collider, and at the 99.99% C.L. with the higher luminosity of the next run. Detector acceptance, efficiency, and migration effects are taken into account. The test relies on the spin correlations alone and does not require the determination of probabilities—in contrast to all other tests of Bell inequalities.Keywords
Funding Information
- Università degli Studi di Trieste
- Scuola Internazionale Superiore di Studi Avanzati
- Institute for Fundamental Physics of the Universe
- Trieste Institute for Theoretical Quantum Technologies
This publication has 40 references indexed in Scilit:
- Testing Bell's inequality using charmonium decaysProgress of Theoretical and Experimental Physics, 2013
- Quantum entanglementReviews of Modern Physics, 2009
- Bell's inequality in charmonium decays \eta_c\to\Lambda\bar{\Lambda}\hbox{,}\; \chi_c\to\Lambda\bar{\Lambda} and J/\psi\to\Lambda\bar{\Lambda}Journal of Physics G: Nuclear and Particle Physics, 2008
- Top-Quark Spin Correlations at Hadron Colliders: Predictions at Next-to-Leading Order QCDPhysical Review Letters, 2001
- Three-party entanglement from positroniumPhysical Review A, 2001
- Direct CP-violation as a test of quantum mechanicsThe European Physical Journal C, 2000
- Measurement of the Top Quark Mass Using Dilepton EventsPhysical Review Letters, 1998
- Bell’s locality and/ɛPhysical Review D, 1998
- Bell's theorem. Experimental tests and implicationsReports on Progress in Physics, 1978
- Proposed Experiment to Test Local Hidden-Variable TheoriesPhysical Review Letters, 1969