Login

Quantum Observables for Collider Physics 2026

20–24 Apr 2026
CERN
Europe/Zurich timezone

TH workshop secretariat

Contribution List

69 out of 69 displayed
Export to PDF
  1. 1. Welcome and Introduction
    Yoav Afik (University of Chicago (US))
    20/04/2026, 13:00
  2. 11. Plenary talk: Bell nonlocality: from foundations to applications
    Nicolas Brunner (University of Geneva)
    20/04/2026, 13:15
  3. 33. A Quantum Information-Theoretic View of Observables in Collider Experiments
    Beatrix Hiesmayr (IT:U Austria)
    20/04/2026, 14:00
  4. 34. Characterizing entanglement dynamics in QED scattering processes
    Massimo Blasone (Università di Salerno and INFN)
    20/04/2026, 14:25
  5. 32. Plenary talk: Quantum sensing for particle physics
    Michael Doser (CERN)
    20/04/2026, 14:50
  6. 83. Scenes from the Quantum Century: From Curious Hippies to Novel Tests of Bell’s Inequality
    David Kaiser (MIT)
    20/04/2026, 16:00

    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...

    Go to contribution page
  7. 37. Higher-order corrections in Higgs decays
    Alberto Navarro (Seoultech)
    21/04/2026, 09:00
  8. 38. Two qutrits at the LHC: a higher-order perspective
    Giovanni Pelliccioli (Università degli Studi di Milano-Bicocca)
    21/04/2026, 09:25
  9. 36. Measurements of Z-boson pair entanglement in decays of Higgs bosons at the ATLAS experiment
    Tairan Xu (University of Michigan (US))
    21/04/2026, 09:50
  10. 35. Mapping the Quantum State of Higgs→ZZ
    Jeffrey Davis (Johns Hopkins University (US))
    21/04/2026, 10:15
  11. 39. Spin density matrix and quantum observables of a two-qubit system at colliders
    Dong Woo Kang (JBNU)
    21/04/2026, 11:10
  12. 40. Measurements of entanglement and characterization of the ttbar quantum state with the CMS experiment [20'+5']
    Otto Heinz Hindrichs (University of Rochester (US))
    21/04/2026, 11:35
  13. 41. Measurement of Quantum information observables in top-quark pairs using the ATLAS detector [20'+5']
    Fiona Ann Jolly (Deutsches Elektronen-Synchrotron (DE))
    21/04/2026, 12:00
  14. 42. Qubit entanglement from forward scattering [20'+5']
    Kamila Kowalska (National Centre for Nuclear Research)
    21/04/2026, 14:00
  15. 43. Entanglement, Symmetries and Higgs Physics [20'+5']
    Carlos Wagner
    21/04/2026, 14:25
  16. 44. Quantum Entanglement and Enhanced Symmetries: From Two-body to Many-body systems [20'+5']
    Ian Low
    21/04/2026, 14:50
  17. 46. Does Entanglement Suppression Lead to Enhanced Symmetries? [20'+5']
    Spencer Chang (University of Oregon)
    21/04/2026, 15:45
  18. 45. Symmetries of the S-matrix from the lens of Quantum Information and Computation [20'+5']
    Navin McGinnis
    21/04/2026, 16:10
  19. 12. Plenary talk: Entangled squeezed quantum states of gravitons as a probe of Quantum Gravity [40'+5']
    Nikos Mavromatos (University of London (GB))
    21/04/2026, 16:35
  20. 74. Flavor-Space Quantum Tomography of Neutral Mesons [20'+5']
    Arthur Wu
    22/04/2026, 09:00
  21. 75. Test of quantum entanglement in Upsilon(4S)-> B0\bar{B}0 [20'+5']
    Sagar Hazra
    22/04/2026, 09:25
  22. 76. First observation of the time-dependent "Back from the Future" quantum effect in entangled neutral kaons at KLOE/KLOE-2 [20'+5']
    Antonio Di Domenico (Sapienza Universita e INFN, Roma I (IT))
    22/04/2026, 09:50
  23. 82. Quantum-entangled pions and implications for CP violation [20'+5']
    Emidio Gabrielli (Nat. Inst. of Chem.Phys. & Biophys. (EE))
    22/04/2026, 10:15
  24. 51. Spin correlations and locality tests at collider experiments (remote presentation) [20'+5']
    Claude Duhr
    22/04/2026, 11:10
  25. 52. Entanglement and Bell locality tests at colliders [20'+5']
    Juan Antonio Aguilar Saavedra (Consejo Superior de Investigaciones Científicas (ES))
    22/04/2026, 11:35
  26. 53. Opportunities, assumptions and limitations for QI measurements at the LHC [20'+5']
    Fabio Cerutti (Lawrence Berkeley National Lab. (US))
    22/04/2026, 12:00
  27. 56. Decoherence at colliders [20'+5']
    Rafael Aoude
    22/04/2026, 14:00
  28. 55. Decoherence in high energy collisions as renormalization group flow [20'+5']
    Liantao Wang
    22/04/2026, 14:25
  29. 54. Experimental prospects for the measurement of quantum decoherence at colliders [20'+5']
    Marcel Vos (IFIC Valencia (ES))
    22/04/2026, 14:50
  30. 57. Practically and Efficiently Verifying Entanglement with an Incomplete Measurement Setting [20'+5']
    Joonwoo Bae (Korea Advanced Institute of Science and Technology)
    22/04/2026, 15:45
  31. 58. Nonlocality of quantum transformations: structure and certification [20'+5']
    Albert Rico
    22/04/2026, 16:10
  32. 80. Plenary talk: Laboratory-based tests of quantum effects in the gravitational field - Vlatko Vedral [40'+5']
    Vlatko Vedral
    22/04/2026, 16:35
  33. 13. Panel Discussion 1 - QIS for HEP, HEP for QIS
    Beatrix Hiesmayr (IT:U Austria), Regina Demina (University of Rochester (US))
    22/04/2026, 17:20
  34. 77. Probing quantum properties of the quark-gluon plasma via spin correlations of Lambda hyperons [20'+5']
    Enrico Speranza (CERN)
    23/04/2026, 09:15
  35. 79. STAR Collaboration results on the measurement of Λ–Λ̄ entanglement [20'+5']
    Zhoudunming Tu
    23/04/2026, 09:40
  36. 47. Quantum computing and entanglement for scattering observables in low energy few-nucleon systems [20'+5']
    Thomas Richardson (UC Berkeley)
    23/04/2026, 10:05
  37. 67. Towards a Quantum Information Theory of Hadronization [20'+5']
    Rebecca von Kuk (Univerisity of Bern)
    23/04/2026, 11:00
  38. 68. The Maximal Entanglement Limit in Statistical and High Energy Physics [20'+5']
    Dmitri Kharzeev
    23/04/2026, 11:25
  39. 70. Magic in high energy scattering [20'+5']
    Chris White (Queen Mary University of London)
    23/04/2026, 14:00
  40. 69. Flavoured non-local magic [20'+5']
    Giorgio Busoni (Adelaide University)
    23/04/2026, 14:25
  41. 71. The Quantum Magic of Standard Model Parameters [20'+5']
    Zhewei Yin
    23/04/2026, 14:50
  42. 72. Gauge invariance from QI [20'+5']
    Alba Cervera Lierta (Barcelona Supercomputing Center)
    23/04/2026, 16:00
  43. 73. Extremal Magic States from Symmetric Lattices [20'+5']
    Kazuki Sakurai (University of Warsaw)
    23/04/2026, 16:25
  44. 86. Correlations and information processing - quantum and beyond
    Pawel Horodecki (Gdansk University of Technology)
    23/04/2026, 17:00

    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...

    Go to contribution page
  45. 16. Panel Discussion 2 - What constitutes a measurement in HEP experiments?
    Prof. Christopher Timpson (University of Oxford), Juan Ramon Munoz De Nova
    23/04/2026, 18:00
  46. 63. Quantum Information at the EIC [20'+5']
    Kun Cheng (University of Pittsburgh)
    24/04/2026, 09:15
  47. 64. Quantum entanglement in diffractive DIS [20'+5']
    Yoshitaka Hatta (BNL)
    24/04/2026, 09:40
  48. 65. Quantum Tomography of Fermion Pairs in e+e- Collisions: Effects from Beam Polarizations [20'+5']
    Tao Han
    24/04/2026, 10:05
  49. 66. Complementary Quantum Frontiers: pp, e⁺e⁻, and μ⁺μ⁻ Colliders [20'+5']
    Andreas Werner Jung (Purdue University (US))
    24/04/2026, 11:00
  50. 15. Summary [15'+5']
    Alan Barr (University of Oxford (GB))
    24/04/2026, 11:25
  51. 29. Analytic local hidden variable models of spin at particle colliders
    Radoslaw Piotr Grabarczyk (University of Oxford (GB))

    We prove that measurements of decay directions of unstable particles can in principle rule out any local hidden variable model in which the response function is analytic i.e. has a convergent power series expansion at each point on the sphere. Ruling out such a large class of theories can in practice be approached by ruling out local hidden variable models with sequentially less...

    Go to contribution page
  52. 4. Are quantum observables sensitive to CP-violation in $t\bar{t}$ pairs?
    Olimpia Miniati

    Within the framework currently adopted for the description of the fundamental interactions, the particles involved in high-energy collisions are expected to exhibit a basic quantum behaviour.
    As a consequence of this statement, a novel class of "quantum" observables for collider studies naturally arises, whose physical interpretation is rooted in the characteristics of the underlying quantum...

    Go to contribution page
  53. 30. Bell Tests with Unstable Particles at the LHC via an Open-Quantum-Systems Formulation
    Dr Danilo Micali Fucci (Faculty of Philosophy, University of Oxford)

    Collider proposals for Bell tests with unstable particles (e.g., $H \to ZZ^{\ast},\; WW^{\ast}$) face two structural issues: measurement settings are not freely choosable, and the boson-pair spin density matrix is inferred indirectly from decay kinematics through QFT-based reconstruction, obscuring the operational meaning of the Bell observables and introducing theory dependence in the...

    Go to contribution page
  54. 3. Decoherence effects in quantum correlations at colliders
    Prof. Fabio Maltoni (Universite Catholique de Louvain (UCL) (BE) and Università di Bologna)

    The Quantum Observables approach to High Energy Physics is an emerging framework in which observables borrowed from Quantum Information theory are used to test the Standard Model and explore BSM Physics. This methodology received experimental validation in 2023-2024, when the ATLAS and CMS collaborations reported measurements, via quantum tomography, of entanglement in $t\bar{t}$ pairs...

    Go to contribution page
  55. 18. Double Double Reco Trouble
    Ivo Young (University of Glasgow (GB))

    Reconstructing dileptonic $t\bar{t}$ events remains a long-standing challenge due to the presence of two undetectable neutrinos. Many techniques still in use today have seen little change over the past three decades. This poster gives an overview of the reconstruction algorithms currently used by the ATLAS experiment: Neutrino Weighting, Sonneschein and Ellipse Method, and a novel...

    Go to contribution page
  56. 26. Entanglement in Higgs Scattering: connection to LHC constraints and  symmetry
    Ms ROJALIN PADHAN (CAU, Seoul)

    We investigate entanglement generation in Higgs scattering processes within SMEFT, treating the weak isospin as qubit. For 2→2 Higgs scattering, we calculate the von Neumann entropy to measure entanglement between the momentum and isospin degrees of freedom in the final state, and concurrence to quantify two-qubit entanglement within the isospin subspace. We examine whether these entanglement...

    Go to contribution page
  57. 21. Experimental characterization of the hierarchy of quantum correlations in tt pairs
    Alan Herrera (University of Rochester (US))

    Recent LHC measurements enable the study of the quantum state of top quark-antiquark ($t\bar{t}$) pairs via the spin degree of freedom. Using the CMS measurement of $t\bar{t}$ spin correlations in the helicity and beam bases, we evaluate a set of quantum information observables, including discord, steerability, Bell correlation, and magic. These observables provide a quantitative...

    Go to contribution page
  58. 2. Experimental prospects for quantum decoherence measurements at colliders
    Guillermo García Mir (Univ. of Valencia and CSIC (ES))

    In this contribution we explore the potential of colliders - existing facilities like Belle II and the LHC and the future Higgs/top/EW factory - to study interacting quantum systems. We present projections for the statistical significance of the decoherence due to final-state radiation in top quark pair production at the LHC and at an e+e- collider and in tau-lepton pair production in...

    Go to contribution page
  59. 6. Generative Entanglement Witness
    Sung Won Yun (KAIST)

    Entanglement corresponds to quantum correlations that have no classical counterparts. Its detection can be realized by estimation of a collection of observables that constitute entanglement witnesses (EWs), for which, however, no systematic method of their construction is known so far. In this work, we introduce a supermap-based framework for detecting entanglement generation in quantum...

    Go to contribution page
  60. 25. Methods for Quantum Discord Measurement at LHC
    Ondrej Penc (Czech Academy of Sciences (CZ))

    Quantum discord quantifies non-classical correlations beyond entanglement and is defined as the difference between two quantum generalizations of mutual information constructed from von Neumann entropies. For top-antitop pairs, the discord can be estimated analytically under the Bell-diagonal approximation, where it becomes a function of the spin-correlation coefficients and can be directly...

    Go to contribution page
  61. 5. Mirrored entanglement witnesses for multipartite and high-dimensional quantum systems
    지헌 성 (Korea Advanced Institute of Science and Technology)

    Entanglement witnesses (EWs) provide a powerful and flexible method for detecting entanglement in quantum systems. Recently, mirrored entanglement witnesses have been introduced, revealing that a single EW can admit nontrivial upper bounds and thus be paired with a mirrored witness [1]. This framework significantly enhances the detection capability of EWs by allowing entanglement to be...

    Go to contribution page
  62. 19. Next-to-Leading-Order Electroweak Corrections to Quantum Resources in Lepton-Lepton Colliders
    Thomas Driscoll (University of Oregon)

    We study how virtual next-to-leading-order (NLO) electroweak corrections affect quantum-information resources in lepton-lepton collisions. Interpreting helicity amplitudes as multi-qudit quantum states, we quantify entanglement and magic in the processes $\ell^+\ell^- \to \tau^+\tau^-,\, WW,\, ZZ$. Including one-loop corrections, we construct the corrected helicity density matrices and...

    Go to contribution page
  63. 23. Off the Diagonal: Constraining CP-odd New Physics with Quantum Information Techniques
    Avalon Roberts (The University of Manchester (GB))

    New sources of CP violation beyond those described in the Standard Model are required to explain the observed matter–antimatter asymmetry of the Universe. The Standard Model Effective Field Theory provides a framework to introduce additional electroweak sources of CP-odd physics in a model-independent manner. Suppressed in polarisation-blind observables, traditional probes of these New Physics...

    Go to contribution page
  64. 7. Parameter Inference from Final-State Entanglement in Higgs Decays
    Masanori Tanaka

    In this talk, we discuss the entanglement entropy produced by decaying particles and its implications for the parameters in the Standard Model (SM). The decay out-states of unstable particles provide a unique, well-defined intrinsic quantum-information probe of the SM parameter space. We focus on Higgs decays as an example in this presentation. After tracing out kinematics, we compute...

    Go to contribution page
  65. 24. Probing Post-Decay Entanglement in Collider Experiments
    Laurel Carpenter (University of Rochester (US))

    Following recent LHC measurements of entanglement in top quark-antiquark pairs ($t\bar{t}$), the next step towards a deeper understanding of quantum correlations is to investigate whether this entanglement persists when one of the pair decays into a $W$ boson and a bottom (anti-)quark. The $tW$ system, formed by the $W$ boson and the remaining top quark, provides the unique opportunity to...

    Go to contribution page
  66. 27. Quantum correlations in top quark pair production with dileptonic events.
    Angelo Arisi (Purdue University (US))

    The measurement of quantum observables at colliders is fundamental not only as a test of quantum mechanics properties at high energies but also for their sensitivity to BSM effects.
    Top quark has been found to be an ideal candidate to study these properties in high energy physics, as demonstrated by the recent measurement of entanglement in top pair production at LHC. In particular, a final...

    Go to contribution page
  67. 28. Quantum entanglement with top quarks at a photon linear collider
    Dong Woo Kang (Jeonbuk National University)

    The two-photon collision option of a linear e+e− collider, a photon linear collider, is using the back-scattered laser photons off the incident electrons and positrons. The polarizations of the colliding photons can be controlled by using the polarized initial electrons and positrons and the polarized laser beams. We study the impact of the polarizations of the colliding photons on observation...

    Go to contribution page
  68. 20. Quantum Tomography of B°/anti-B° Systems at the Upsilon(4S) and Upsilon(5S)
    Mr Enzo Ghilardi Nogueira (Max-Planck-Institut für Physik), Mr Felipe Recio Busquier (Max-Planck-Institut für Physik)

    B°/anti-B° pairs produced in the decays of the Upsilon(4S) and (5S) are supposed to be in an entangled state. At the (4S) it should be antisymmetric C=-1 state, at the (5S) both the antisymmetric (C=-1) and the symmetric (C=+1) state are possible.
    The entanglement at the (4S) is an important condition for the measurement of time dependent CP violation, any admixture of other states would...

    Go to contribution page
  69. 22. Testing the Born Rule with Spin and Polarization Measurements at the LHC
    Mira Varma (Yale University (US))

    The Born rule is a central postulate of quantum mechanics and underlies all probabilistic predictions in collider physics, yet direct experimental tests of this assumption have largely been confined to low-energy systems. In this work, we investigate how spin and polarization measurements at high-energy colliders can probe the Born rule at TeV energies. Focusing on experimentally accessible...

    Go to contribution page