Tests of quantum contextuality in particle physics

• URL: http://arxiv.org/abs/2504.12382v1
• Date: Wed, 16 Apr 2025 18:00:01 GMT
• Title: Tests of quantum contextuality in particle physics
• Authors: M. Fabbrichesi, R. Floreanini, E. Gabrielli, L. Marzola,
• Abstract summary: Quantum contextuality refers to the impossibility of assigning a predefined, intrinsic value to a physical property.<n> polarization states of single spin-1 massive particles produced at colliders are the ideal setting for testing contextuality.<n>We discuss the presence of quantum contextuality in spin states of bipartite systems formed by spin particles.
• Score: 0.0
• License: http://arxiv.org/licenses/nonexclusive-distrib/1.0/
• Abstract: Quantum contextuality refers to the impossibility of assigning a predefined, intrinsic value to a physical property of a system independently of the context in which the property is measured. It is, perhaps, the most fundamental feature of quantum mechanics. The many states with different spin that particle physics provides are the ideal setting for testing contextuality. We verify that the polarization states of single spin-1 massive particles produced at colliders are contextual. We test $W^{+}$ gauge bosons produced in top-quark decays, $J/\psi$ and $K^{*}(892)^0$ mesons in $B$-meson decays and $\phi$ mesons in $\chi^0_c$ and $\chi^1_c$ charmonium decays by reinterpreting the data and the analyses of the ATLAS, LHCb, Belle II and BESIII experimental collaborations, respectively. The polarization states of these four particles show contextuality with a significance larger than $5\sigma$. We also discuss the presence of quantum contextuality in spin states of bipartite systems formed by spin-1/2 particles. We test $\Lambda$ and $\Sigma$ baryons reinterpreting two BESIII data analyses, and pairs of top quarks utilizing a recent analysis of the CMS collaboration. Quantum contextuality is present with a significance exceeding $5\sigma$ also in these cases. In addition, we study the feasibility of testing quantum contextuality by means of $Z$ boson production in association with the Higgs boson, $Z$ and $W$ bosons pairs created in Higgs boson decays and with pairs of $\tau$ leptons. For the latter, we use Monte Carlo simulations that mimic the settings of SuperKEKB and of future lepton colliders. Experiments at high energies, though not designed for the purpose, perform surprisingly well in testing for quantum contextuality.

Related papers

• Quantum contextuality of spin-1 massive particles [0.0]
  Contextuality is a fundamental property of quantum mechanics.<n>We show that the polarizations of spin-1 massive particles produced at collider experiments indeed exhibit contextuality.
  arXiv  Detail & Related papers  (2025-03-18T18:00:01Z)
• Coherence in Property Testing: Quantum-Classical Collapses and Separations [42.44394412033434]
  We show that no tester can distinguish subset states of size $2n/8$ from $2n/4$ with probability better than $2-Theta(n)$.<n>We also show connections to disentangler and quantum-to-quantum transformation lower bounds.
  arXiv  Detail & Related papers  (2024-11-06T19:52:15Z)
• Testing Bell inequalities and probing quantum entanglement at CEPC [5.473273466387532]
  We study quantum entanglement and test violation of Bell-type inequality at the Circular Electron Positron Collider (CEPC) Our study is based on a fast simulation of the $Z$ boson pair production from Higgs boson decay at 250$ GeV. The presence of the quantum entanglement is probed with more than 2$sigma$ confidence level.
  arXiv  Detail & Related papers  (2024-10-22T13:48:06Z)
• Generalized quantum measurement in spin-correlated hyperon-antihyperon decays [11.594851987280764]
  We introduce a generalized quantum measurement description for decay processes of spin-1/2 hyperons. We validate this approach by aligning it with established theoretical calculations. We employ quantum simulation to observe the violation of CHSH inequalities in hyperon decays.
  arXiv  Detail & Related papers  (2024-02-26T13:54:20Z)
• Full quantum tomography of top quark decays [0.0]
  Quantum tomography in high-energy physics processes has usually been restricted to the spin degrees of freedom. We address the case of top quark decays $t to W b$, in which the orbital angular momentum ($L$) and the spins of $W$ and $b$ are intertwined into a 54-dimensional $LWb$ density operator. The entanglement between $L$ and the $W$ or $b$ spin is large and could be determined for decays of single top quarks produced at the Large Hadron Collider with Run 2 data.
  arXiv  Detail & Related papers  (2024-02-22T17:33:33Z)
• Graph-theoretic insights on the constructability of complex entangled states [0.24578723416255752]
  We introduce the technique of local sparsification on experiment graphs, using which we answer a crucial open question in experimental quantum optics. This provides us with more insights into quantum resource theory, the limitation of specific quantum photonic systems and initiates the use of graph-theoretic techniques for designing quantum physics experiments.
  arXiv  Detail & Related papers  (2023-04-13T11:13:17Z)
• Classical shadow tomography for continuous variables quantum systems [13.286165491120467]
  We introduce two experimentally realisable schemes for obtaining classical shadows of CV quantum states. We are able to overcome new mathematical challenges due to the infinite-dimensionality of CV systems. We provide a scheme to learn nonlinear functionals of the state, such as entropies over any small number of modes.
  arXiv  Detail & Related papers  (2022-11-14T17:56:29Z)
• Coherent dynamics in a five-level atomic system [62.997667081978825]
  coherent control of multi-partite quantum systems is one of the central prerequisites in quantum information processing. Laser-cooled neon atoms in the metastable state of state $1s2 2s2 2p5 3s$ are prepared. Coherence properties of the prepared states are studied using Ramsey and spin echo measurements.
  arXiv  Detail & Related papers  (2022-10-21T11:44:15Z)
• Laboratory-frame tests of quantum entanglement in $H \to WW$ [0.0]
  Quantum entanglement between the two $W$ bosons resulting from the decay of a Higgs boson may be investigated in the dilepton channel $H to WW to ell nu ell nu$ The dilepton invariant mass distribution, already measured by the ATLAS and CMS Collaborations at the LHC, can be used to observe the quantum entanglement of the $WW$ pair.
  arXiv  Detail & Related papers  (2022-09-28T12:22:12Z)
• Experimental observation of thermalization with noncommuting charges [53.122045119395594]
  Noncommuting charges have emerged as a subfield at the intersection of quantum thermodynamics and quantum information. We simulate a Heisenberg evolution using laser-induced entangling interactions and collective spin rotations. We find that small subsystems equilibrate to near a recently predicted non-Abelian thermal state.
  arXiv  Detail & Related papers  (2022-02-09T19:00:00Z)
• Photon-mediated Stroboscopic Quantum Simulation of a $\mathbb{Z}_{2}$ Lattice Gauge Theory [58.720142291102135]
  Quantum simulation of lattice gauge theories (LGTs) aims at tackling non-perturbative particle and condensed matter physics. One of the current challenges is to go beyond 1+1 dimensions, where four-body (plaquette) interactions, not contained naturally in quantum simulating devices, appear. We show how to prepare the ground state and measure Wilson loops using state-of-the-art techniques in atomic physics.
  arXiv  Detail & Related papers  (2021-07-27T18:10:08Z)
• Electric Field Decay Without Pair Production: Lattice, Bosonization and Novel Worldline Instantons [0.0]
  We study the quantum evolution of electric fields when the field points in a compact direction with circumference $L d$ using the massive Schwinger model. We uncover a new and previously unknown set of instantons that result in novel physics that disagrees with all previous estimates.
  arXiv  Detail & Related papers  (2021-07-09T17:26:39Z)
• Heisenberg-Limited Waveform Estimation with Solid-State Spins in Diamond [15.419555338671772]
  Heisenberg limit in arbitrary waveform estimation is quite different with parameter estimation. It is still a non-trivial challenge to generate a large number of exotic quantum entangled states to achieve this quantum limit. This work provides an essential step towards realizing quantum-enhanced structure recognition in a continuous space and time.
  arXiv  Detail & Related papers  (2021-05-13T01:52:18Z)
• Partitioning dysprosium's electronic spin to reveal entanglement in non-classical states [55.41644538483948]
  We report on an experimental study of entanglement in dysprosium's electronic spin. Our findings open up the possibility to engineer novel types of entangled atomic ensembles.
  arXiv  Detail & Related papers  (2021-04-29T15:02:22Z)
• Quantum Simulation of 2D Quantum Chemistry in Optical Lattices [59.89454513692418]
  We propose an analog simulator for discrete 2D quantum chemistry models based on cold atoms in optical lattices. We first analyze how to simulate simple models, like the discrete versions of H and H$+$, using a single fermionic atom. We then show that a single bosonic atom can mediate an effective Coulomb repulsion between two fermions, leading to the analog of molecular Hydrogen in two dimensions.
  arXiv  Detail & Related papers  (2020-02-21T16:00:36Z)

This list is automatically generated from the titles and abstracts of the papers in this site.

This site does not guarantee the quality of this site (including all information) and is not responsible for any consequences.