Entanglement and accidental symmetries in the nucleon-nucleon system

• URL: http://arxiv.org/abs/2510.09466v1
• Date: Fri, 10 Oct 2025 15:21:01 GMT
• Title: Entanglement and accidental symmetries in the nucleon-nucleon system
• Authors: Alma L. Cavallin, Oliver Thim, Christian Forssén,
• Abstract summary: Entanglement suppression is not observed in neutron-neutron scattering.<n>We study the connection between accidental symmetries in the nuclear interaction and spin entanglement in two-nucleon scattering.
• Score: 0.0
• License: http://creativecommons.org/licenses/by/4.0/
• Abstract: We study the connection between accidental symmetries in the nuclear interaction and spin entanglement in two-nucleon scattering. Specifically, we incorporate different levels of Wigner $SU(4)$ and Serber symmetries into leading-order potentials derived from chiral effective field theory. We conduct a quantitative analysis by computing the full $S$ matrix, demonstrating that the neutron-proton spin entanglement can be related to the symmetry properties of the interaction and the presence of certain operators and partial waves. Furthermore, we study the order-by-order evolution of the spin entanglement, up to next-to-next-to-leading order in Weinberg power counting, for both neutron-proton and neutron-neutron scattering. Entanglement suppression is not observed in neutron-neutron scattering, which can be attributed to the Pauli principle and the absence of accidental symmetries in this system. We conclude that entanglement is a useful guide for studying the power counting and symmetries in nuclear interactions derived from effective field theories.

Related papers

• Symmetry-protected topology and deconfined solitons in a multi-link $\mathbb{Z}_2$ gauge theory [45.88028371034407]
  We study a $mathbbZ$ lattice gauge theory defined on a multi-graph with links that can be visualized as great circles of a spherical shell.<n>We show that this leads to state-dependent tunneling amplitudes underlying a phenomenon analogous to the Peierls instability.<n>By performining a detailed analysis based on matrix product states, we prove that charge deconfinement emerges as a consequence of charge-fractionalization.
  arXiv  Detail & Related papers  (2026-03-02T22:59:25Z)
• Degeneracy beyond the parity-symmetry protection in one-dimensional spinless models: The parity-violating Kerr parametric oscillator [0.0]
  One-dimensional quantum systems undergo spontaneous symmetry-breaking, having a symmetric (non-degenerate) and a broken-symmetry phase.<n>In most cases, the spontaneously-broken symmetry is parity.<n>It is possible to obtain similar phases in systems without parity symmetry, through an antiunitary symmetry.
  arXiv  Detail & Related papers  (2025-11-12T10:03:12Z)
• Entanglement suppression and emergent symmetries in hadron scatterings [0.0]
  Recently entanglement suppression was proposed to be one potential origin of emergent symmetries.<n>In this work, we extend this theoretical framework to accommodate particles with arbitrary spins and/or arbitrary group representations.
  arXiv  Detail & Related papers  (2025-07-30T14:06:12Z)
• Evolution of multi-qubit correlations driven by mutual interactions [49.1574468325115]
  We analyze the evolution of the correlation tensor elements of quantum systems composed of $frac12$-spins.<n>We show how a strong external field can play a stabilizing factor with respect to certain correlation characteristics.
  arXiv  Detail & Related papers  (2025-07-01T11:45:08Z)
• Harnessing Chiral Spin States in Molecular Nanomagnets for Quantum Technologies [44.1973928137492]
  We show that chiral qubits naturally suppress always-on interactions that can not be switched off in weakly coupled qubits.<n>Our findings establish spin chirality engineering as a promising strategy for mitigating always-on interaction in entangling two chiral qubits in molecular quantum technologies.
  arXiv  Detail & Related papers  (2025-01-21T08:23:12Z)
• Entanglement in few-nucleon scattering events [0.0]
  We investigate the spin entanglement in few-nucleon scattering processes involving nucleons and deuterons. In contrast to proton-neutron scattering, no universal low-energy features are evident in the spin entanglement in neutron-deuteron, proton-deuteron, and deuteron-deuteron scattering.
  arXiv  Detail & Related papers  (2023-12-22T07:25:02Z)
• Emergence of non-Abelian SU(2) invariance in Abelian frustrated fermionic ladders [37.69303106863453]
  We consider a system of interacting spinless fermions on a two-leg triangular ladder with $pi/2$ magnetic flux per triangular plaquette. Microscopically, the system exhibits a U(1) symmetry corresponding to the conservation of total fermionic charge, and a discrete $mathbbZ$ symmetry. At the intersection of the three phases, the system features a critical point with an emergent SU(2) symmetry.
  arXiv  Detail & Related papers  (2023-05-11T15:57:27Z)
• Dilute neutron star matter from neural-network quantum states [58.720142291102135]
  Low-density neutron matter is characterized by the formation of Cooper pairs and the onset of superfluidity. We model this density regime by capitalizing on the expressivity of the hidden-nucleon neural-network quantum states combined with variational Monte Carlo and reconfiguration techniques.
  arXiv  Detail & Related papers  (2022-12-08T17:55:25Z)
• Exact solutions of interacting dissipative systems via weak symmetries [77.34726150561087]
  We analytically diagonalize the Liouvillian of a class Markovian dissipative systems with arbitrary strong interactions or nonlinearity. This enables an exact description of the full dynamics and dissipative spectrum. Our method is applicable to a variety of other systems, and could provide a powerful new tool for the study of complex driven-dissipative quantum systems.
  arXiv  Detail & Related papers  (2021-09-27T17:45:42Z)
• Symmetric and antisymmetric kernels for machine learning problems in quantum physics and chemistry [0.3441021278275805]
  We derive symmetric and antisymmetric kernels by symmetrizing and antisymmetrizing conventional kernels. We show that by exploiting symmetries or antisymmetries the size of the training data set can be significantly reduced.
  arXiv  Detail & Related papers  (2021-03-31T17:32:27Z)
• Elastic scattering of twisted neutrons by nuclei [0.0]
  Twisted neutrons have definite quantized values of an angular momentum projection along the direction of propagation. We show that it results in novel observable effects for the scattering cross section, spin asymmetries and polarization of the scattered neutrons.
  arXiv  Detail & Related papers  (2021-02-20T16:23:41Z)
• Symmetry allows for distinguishability in totally destructive many-particle interference [52.77024349608834]
  We investigate, in a four photon interference experiment in a laser-written waveguide structure, how symmetries control the suppression of many-body output events of a $J_x$ unitary. We show that totally destructive interference does not require mutual indistinguishability between all, but only between symmetrically paired particles.
  arXiv  Detail & Related papers  (2021-02-19T16:37:19Z)
• Latent symmetry induced degeneracies [0.0]
  We develop an approach to explain degeneracies by tracing them back to symmetries of an isospectral effective Hamiltonian. As an application, we relate the degeneracies induced by the rotation symmetry of a real Hamiltonian to a non-abelian latent symmetry group.
  arXiv  Detail & Related papers  (2020-11-26T17:37:30Z)

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.