Quantum Observables for Collider Physics 2026
Please note that registration for this workshop is restricted to invited participants only; general applications for attendance are not being accepted at this time.
The workshop aims at gathering theorists and experimentalists interested in measuring quantum information observables, such as magic and entanglement, on particles created at colliders and using these new observables as an innovative direction to probe fundamental interactions.
The programme includes discussion on the recent experimental results obtained in this field, on the implications of these new observables for new physics searches, and feasibility studies for multiple final states in current and future colliders. On the theoretical side, the workshop also aims to investigate the possible integration of quantum information–theoretic concepts in quantum field theory and particle physics.
It will bring together experts not only from particle physics, but also from quantum information science and nuclear theory, and will include panel discussions and overview talks to explore the broader links between quantum information, technologies, and high-energy physics.
This is the third edition of a workshop series previously held at the Galileo Galilei Institute (GGI) in Florence in 2023 and 2025. It builds on a growing number of international meetings on quantum-information applications to high-energy physics organized in recent years, including those in Oxford in 2023< and 2024, Pittsburgh in 2024, and at the WQC in Shanghai 2025.
This event is sponsored by the Department of Theoretical Physics at CERN, the CERN Quantum Technology Initiative as well as the CERN-Korea collaboration program.
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CERN access and badge collection
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Lunch Break 1h 15m
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Welcome and Introduction 15m 4/3-006 - TH Conference RoomSpeaker: Yoav Afik (University of Chicago (US))
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Plenary talk: Bell nonlocality: from foundations to applications 45m 4/3-006 - TH Conference RoomSpeaker: Nicolas Brunner (University of Geneva)
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Session 1: Quantum Information in Particle Physics 4/3-006 - TH Conference RoomConvener: Juan Ramon Munoz De Nova
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A Quantum Information-Theoretic View of Observables in Collider Experiments 25mSpeaker: Beatrix Hiesmayr (IT:U Austria)
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Characterizing entanglement dynamics in QED scattering processes 25mSpeaker: Massimo Blasone (Università di Salerno and INFN)
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Plenary talk: Quantum sensing for particle physics 40m 4/3-006 - TH Conference RoomSpeaker: Michael Doser (CERN)
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Scenes from the Quantum Century: From Curious Hippies to Novel Tests of Bell’s Inequality 1h
The hundredth anniversary of quantum mechanics in 2025-26 offers opportunities to consider the history of quantum theory and ask how some of our core ideas were introduced, debated, tested, and ultimately accepted. One of the most central conceptual ingredients of quantum theory is entanglement, nowadays so important to the burgeoning field of quantum information science and technology. Yet the history of quantum entanglement---and of physicists' efforts to understand whether entanglement is a robust feature of the world rather than merely an intriguing hypothesis---has been far from straightforward. In this talk I will describe how a colorful group of physicists during the 1970s wrestled with entanglement and with John Bell's now-famous inequality, exploring the subtle interplay between quantum nonlocality and relativity amid the California counterculture scene. More recently, retracing the history of efforts to conduct experimental tests of Bell's inequality helped to catalyze novel tests, which have aimed to close a series of loopholes, including the recent "Cosmic Bell” experiments. Together this new generation of experiments provides compelling evidence for quantum entanglement while constraining various alternative models---which exploit subtle loopholes---more thoroughly than ever before.
Speaker: David Kaiser (MIT)
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Session 2: LHC Physics - Higgs and VV 4/3-006 - TH Conference RoomConveners: James William Howarth (University of Glasgow (GB)), dorival Gonçalves (Oklahoma State University)
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9:00 AM
Higher-order corrections in Higgs decays 25mSpeaker: Alberto Navarro (Seoultech)
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Two qutrits at the LHC: a higher-order perspective 25mSpeaker: Giovanni Pelliccioli (Università degli Studi di Milano-Bicocca)
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9:50 AM
Measurements of Z-boson pair entanglement in decays of Higgs bosons at the ATLAS experiment 25mSpeaker: Tairan Xu (University of Michigan (US))
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10:15 AM
Mapping the Quantum State of Higgs→ZZ 25mSpeaker: Jeffrey Davis (Johns Hopkins University (US))
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Session 2: LHC Physics - Top 4/3-006 - TH Conference RoomConveners: Eleanor Jones (Deutsches Elektronen-Synchrotron (DE)), Giulia Negro (Purdue University (US))
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11:10 AM
Spin density matrix and quantum observables of a two-qubit system at colliders 25mSpeaker: Dong Woo Kang (JBNU)
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11:35 AM
Measurements of entanglement and characterization of the ttbar quantum state with the CMS experiment [20'+5'] 25mSpeaker: Otto Heinz Hindrichs (University of Rochester (US))
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12:00 PM
Measurement of Quantum information observables in top-quark pairs using the ATLAS detector [20'+5'] 25mSpeaker: Fiona Ann Jolly (Deutsches Elektronen-Synchrotron (DE))
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11:10 AM
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Lunch Break 1h 35m
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Session 3: Entanglement, Scattering and Symmetry 4/3-006 - TH Conference RoomConvener: Massimo Blasone
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Qubit entanglement from forward scattering [20'+5'] 25mSpeaker: Kamila Kowalska (National Centre for Nuclear Research)
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Entanglement, Symmetries and Higgs Physics [20'+5'] 25mSpeaker: Carlos Wagner
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Quantum Entanglement and Enhanced Symmetries: From Two-body to Many-body systems [20'+5'] 25mSpeaker: Ian Low
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Coffee Break 30m 61/1-201 - Pas perdus - Not a meeting room -
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Session 3: Entanglement, Scattering and Symmetry 4/3-006 - TH Conference RoomConvener: Eleni Vryonidou (University of Cyprus (CY))
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3:45 PM
Does Entanglement Suppression Lead to Enhanced Symmetries? [20'+5'] 25mSpeaker: Spencer Chang (University of Oregon)
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4:10 PM
Symmetries of the S-matrix from the lens of Quantum Information and Computation [20'+5'] 25mSpeaker: Navin McGinnis
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Plenary talk: Entangled squeezed quantum states of gravitons as a probe of Quantum Gravity [40'+5'] 45m 4/3-006 - TH Conference RoomSpeaker: Nikos Mavromatos (University of London (GB))
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Poster Session + Drinks 61/1-201 - Pas perdus
61/1-201 - Pas perdus
CERN
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Session 4: Flavor 4/3-006 - TH Conference RoomConveners: Laura Zani, Sven Vahsen (University of Hawaii (US))
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Flavor-Space Quantum Tomography of Neutral Mesons [20'+5'] 25mSpeaker: Arthur Wu
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Test of quantum entanglement in Upsilon(4S)-> B0\bar{B}0 [20'+5'] 25mSpeaker: Sagar Hazra
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9:50 AM
First observation of the time-dependent "Back from the Future" quantum effect in entangled neutral kaons at KLOE/KLOE-2 [20'+5'] 25mSpeaker: Antonio Di Domenico (Sapienza Universita e INFN, Roma I (IT))
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Quantum-entangled pions and implications for CP violation [20'+5'] 25mSpeaker: Emidio Gabrielli (Nat. Inst. of Chem.Phys. & Biophys. (EE))
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Session 5: Entanglement and Bell nonlocality at colliders 4/3-006 - TH Conference RoomConvener: Luca Marzola (National Institute of Chemical Physics and Biophysics (EE))
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11:10 AM
Spin correlations and locality tests at collider experiments (remote presentation) [20'+5'] 25mSpeaker: Claude Duhr
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Opportunities, assumptions and limitations for QI measurements at the LHC [20'+5'] 25mSpeaker: Fabio Cerutti (Lawrence Berkeley National Lab. (US))
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Lunch Break 1h 35m
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Session 6: Decoherence 4/3-006 - TH Conference RoomConveners: Frederic Deliot (Université Paris-Saclay (FR)), Vasiliki Mitsou (IFIC, CSIC-UV)
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Decoherence in high energy collisions as renormalization group flow [20'+5'] 25mSpeaker: Liantao Wang
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Experimental prospects for the measurement of quantum decoherence at colliders [20'+5'] 25mSpeaker: Marcel Vos (IFIC Valencia (ES))
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Session 7: Quantum Verification and Transformation 4/3-006 - TH Conference RoomConveners: Michal Eckstein, Yu Shi
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Practically and Efficiently Verifying Entanglement with an Incomplete Measurement Setting [20'+5'] 25mSpeaker: Joonwoo Bae (Korea Advanced Institute of Science and Technology)
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4:10 PM
Nonlocality of quantum transformations: structure and certification [20'+5'] 20mSpeaker: Albert Rico
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Plenary talk: Laboratory-based tests of quantum effects in the gravitational field - Vlatko Vedral [40'+5'] 45m 4/3-006 - TH Conference RoomSpeaker: Vlatko Vedral
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Panel Discussion 1 - QIS for HEP, HEP for QIS 1h 4/3-006 - TH Conference RoomSpeakers: Beatrix Hiesmayr (IT:U Austria), Regina Demina (University of Rochester (US))
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Workshop Dinner: Café de Mategnin, Meyrin
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Session 8: Quantum Information at the QCD Frontier 4/3-006 - TH Conference RoomConvener: Yoshitaka Hatta (BNL)
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Probing quantum properties of the quark-gluon plasma via spin correlations of Lambda hyperons [20'+5'] 25mSpeaker: Enrico Speranza (CERN)
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9:40 AM
STAR Collaboration results on the measurement of Λ–Λ̄ entanglement [20'+5'] 25mSpeaker: Zhoudunming Tu
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Quantum computing and entanglement for scattering observables in low energy few-nucleon systems [20'+5'] 25mSpeaker: Thomas Richardson (UC Berkeley)
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Session 8: Quantum Information at the QCD Frontier 4/3-006 - TH Conference RoomConvener: Laura Pintucci (Universita degli Studi di Udine (IT))
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Towards a Quantum Information Theory of Hadronization [20'+5'] 25mSpeaker: Rebecca von Kuk (Univerisity of Bern)
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The Maximal Entanglement Limit in Statistical and High Energy Physics [20'+5'] 25mSpeaker: Dmitri Kharzeev
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Lunch Break 2h 10m
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Session 9: Magic 4/3-006 - TH Conference RoomConvener: Martin John White (University of Adelaide (AU))
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Magic in high energy scattering [20'+5'] 25mSpeaker: Chris White (Queen Mary University of London)
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Flavoured non-local magic [20'+5'] 25mSpeaker: Giorgio Busoni (Adelaide University)
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The Quantum Magic of Standard Model Parameters [20'+5'] 25mSpeaker: Zhewei Yin
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Session 9: Magic 4/3-006 - TH Conference RoomConvener: Martin John White (University of Adelaide (AU))
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4:00 PM
Gauge invariance from QI [20'+5'] 25mSpeaker: Alba Cervera Lierta (Barcelona Supercomputing Center)
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Extremal Magic States from Symmetric Lattices [20'+5'] 25mSpeaker: Kazuki Sakurai (University of Warsaw)
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Convener: Pawel Horodecki (Gdansk University of Technology)
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Correlations and information processing - quantum and beyond 1h
Quantum mechanics is a very special physical theory where randomness is built in on the ontological level. In particular it allows quantum correlations – also called quantum entanglement – that are stronger than all the correlations we know from our daily lives.
Einstein's ingenious skepticism about this theory gave rise to the fundamental philosophical question - formalized mathematically by John Bell - about the objective existence of properties of quantum particles before measurement. Schrodinger's reflection on quantum entanglement was the beginning of the information-theoretic description of quantum correlations. It this talk we look at those two faces of quantum mechanics - correlation and information – including the outer perspective of possible future physical theories.From the perspective of Bell test we shall see that on the one hand quantum mechanics look surprisingly powerful and robust – it turns out that, to some extend, its predictions survive even some relaxations of philosophically fundamental ,,free will assumption”. On the other, there still seems to be ,,space at the top”, in the sense of possible extensions of quantum physics that are imaginable without undermining fundamental principle of causality. We shall discuss some of them, including especially intriguing option of jamming of correlations. We shall independently illustrate how some special Bell inequality may behave in tree-particle decays with respect to SM-type interaction.
From the perspective of information processing we shall focus mostly on encoding of information. We shall see that careful quantification of the redundancy in such process in entropic terms can successfully probe some of possible deformations of quantum probabilistic behaviors. We shall argue that this observation as well as long-term questions of limits on linearity of quantum theory supports the recently proposed new paradigm of probing quantum limits namely the quantum input data boxes. Within this paradigm we shall discuss the recent approach to quantum process tomography as a new perspective for high-energy physics. On the one hand the tomography is capable to probe potential extensions of the Standard Model. On the other, it constitutes the foundational test of quantum mechanics itself. An illustration with a process of top quark pair production in polarized lepton colliders will be discussed.
Speaker: Pawel Horodecki (Gdansk University of Technology)
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Panel Discussion 2 - What constitutes a measurement in HEP experiments? 1h 222/R-001Speakers: Prof. Christopher Timpson (University of Oxford), Juan Ramon Munoz De Nova
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Session 10: Future Colliders 4/3-006 - TH Conference RoomConvener: Marcel Vos (IFIC Valencia (ES))
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9:15 AM
Quantum Information at the EIC [20'+5'] 25mSpeaker: Kun Cheng (University of Pittsburgh)
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10:05 AM
Quantum Tomography of Fermion Pairs in e+e- Collisions: Effects from Beam Polarizations [20'+5'] 25mSpeaker: Tao Han
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Session 10: Future Colliders 4/3-006 - TH Conference RoomConvener: Marcel Vos (IFIC Valencia (ES))
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11:00 AM
Complementary Quantum Frontiers: pp, e⁺e⁻, and μ⁺μ⁻ Colliders [20'+5'] 25mSpeaker: Andreas Werner Jung (Purdue University (US))
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Summary [15'+5'] 20m 4/3-006 - TH Conference RoomSpeaker: Alan Barr (University of Oxford (GB))
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Lunch Break 2h 15m
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3:30 PM
Visit at the ATLAS visitor center
On-site booking for other Science Gateway activities: https://visit.cern/families-individual-visitors
Programme: https://visit.cern/programme
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