Photon-nucleon entanglement in Compton scattering at low and high energies

• URL: http://arxiv.org/abs/2608.05330v1
• Date: Wed, 05 Aug 2026 18:40:14 GMT
• Title: Photon-nucleon entanglement in Compton scattering at low and high energies
• Abstract summary: We study spin-spin entanglement in the final state photon-nucleon system in Compton scattering.<n>We find a rich variety of maximally entangled Bell states and their unitary equivalents across different regions of the kinematic plane.<n>In the neutron case, the electric and magnetic polarizabilities dramatically influence the pattern and even the existence of entanglement.
• Score: 0.0
• License: http://creativecommons.org/licenses/by/4.0/
• Abstract: We study spin-spin entanglement in the final state photon-nucleon system in Compton scattering, both at low energy below the pion threshold and at high energy in perturbative QCD to next-to-leading order. We first establish a no-go theorem showing that, for any spin-$\frac{1}{2}$ target, entanglement cannot be generated in unpolarized Compton scattering if the scattering amplitudes are real. We then consider polarized Compton scattering off the electron, the proton and the neutron. At low energy, we uncover a rich variety of maximally entangled Bell states and their unitary equivalents realized across different regions of the kinematic plane. Interestingly, the proton and neutron targets exhibit distinct patterns of entanglement. In the neutron case, the electric and magnetic polarizabilities dramatically influence the pattern and even the existence of entanglement. This suggests that entanglement can serve as a novel tool for investigating the detailed electromagnetic properties of the nucleons.

Related papers

• Emergent Bell-Triplet State in Proton-Proton Scattering [0.0]
  Entanglement is a fundamental resource in quantum information science.<n>We report the emergence of a near-pure Bell-triplet state at a laboratory energy of 151 MeV.<n>This second maximally entangled state is directly shaped by tensor forces beyond leading-order chiral effective field theory.
  arXiv  Detail & Related papers  (2025-10-28T11:46:25Z)
• Wavevector-resolved polarization entanglement from radiative cascades [27.84599956781646]
  We show that there exists an interplay between photon polarization and emission wavevector, strongly affecting quantum correlations when emitters are embedded in micro-cavities. Our results, backed by theoretical modelling, yield a brand-new understanding of cascaded emission for various quantum emitters.
  arXiv  Detail & Related papers  (2024-09-12T09:32:29Z)
• Stability and decay of subradiant patterns in a quantum gas with photon-mediated interactions [34.82692226532414]
  We observe excited self-ordered subradiant patterns in a quantum gas and report lifetimes far beyond the system's typical timescales.<n>Our work sheds light on the microscopic mechanisms stabilizing quantum states of matter and highlights the potential of photon-mediated forces for engineering correlations in many-body quantum systems.
  arXiv  Detail & Related papers  (2024-07-12T12:47:07Z)
• Ultracold Neutrons in the Low Curvature Limit: Remarks on the post-Newtonian effects [49.1574468325115]
  We apply a perturbative scheme to derive the non-relativistic Schr"odinger equation in curved spacetime. We calculate the next-to-leading order corrections to the neutron's energy spectrum. While the current precision for observations of ultracold neutrons may not yet enable to probe them, they could still be relevant in the future or in alternative circumstances.
  arXiv  Detail & Related papers  (2023-12-30T16:45:56Z)
• Production of entangled x rays through nonlinear double Compton scattering [0.0]
  An accessible tabletop source for the production of entangled x rays is crucial for high-energy quantum optics. We present a detailed analysis of the entanglement and polarization of the two photons emitted by an electron in an intense laser wave. We propose an experiment to produce and isolate pairs of entangled x rays, through spectral filtering.
  arXiv  Detail & Related papers  (2023-11-29T16:57:27Z)
• Entanglement Entropy of Compton Scattering with a Witness [0.0]
  Unitarity is shown to require that the entanglement entropy of the witness photon does not change after its entangled partner undergoes scattering. The final mutual information of the electronic and witness particle's polarization is nonzero for low energy Compton scattering.
  arXiv  Detail & Related papers  (2023-05-17T08:14:06Z)
• 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)
• Entanglement of annihilation photons [141.5628276096321]
  We present the results of a new experimental study of the quantum entanglement of photon pairs produced in positron-electron annihilation at rest. Despite numerous measurements, there is still no experimental proof of the entanglement of photons.
  arXiv  Detail & Related papers  (2022-10-14T08:21:55Z)
• Correlations between cascaded photons from spatially localized biexcitons in ZnSe [55.41644538483948]
  We demonstrate a radiative cascade from the decay of a biexciton at an impurity-atom complex in aSe quantum well. Our result establishes impurity atoms inSe as a potential platform for photonic quantum technologies using radiative cascades.
  arXiv  Detail & Related papers  (2022-03-11T23:15:37Z)
• Single quantum emitters with spin ground states based on Cl bound excitons in ZnSe [55.41644538483948]
  We show a new type of single photon emitter with potential electron spin qubit based on Cl impurities inSe. Results suggest single Cl impurities are suitable as single photon source with potential photonic interface.
  arXiv  Detail & Related papers  (2022-03-11T04:29:21Z)
• Rapidly enhanced spin polarization injection in an optically pumped spin ratchet [49.1301457567913]
  We report on a strategy to boost the spin injection rate by exploiting electrons that can be rapidly polarized. We demonstrate this in a model system of Nitrogen Vacancy center electrons injecting polarization into a bath of 13C nuclei in diamond. Through a spin-ratchet polarization transfer mechanism, we show boosts in spin injection rates by over two orders of magnitude.
  arXiv  Detail & Related papers  (2021-12-14T08:23:10Z)
• Wave function of a photon produced in the resonant scattering of twisted light by relativistic ions [0.0]
  We investigate the resonant elastic scattering of twisted light, carrying angular momentum, by partially stripped ions. For the incident Bessel light, the scattered radiation is shown to be in a superposition of twisted modes. This angular momentum transfer makes the resonant photon scattering an effective tool for the production of twisted x-- and even gamma--rays.
  arXiv  Detail & Related papers  (2021-06-23T13:23:48Z)
• One-directional polarization transport in electron/nuclear spin chains with loss and gain [0.0]
  We study the non-Hermitian dynamics of hybrid electron/nuclear spin systems in the simultaneous presence of electron spin pumping and spin-lattice relaxation. We show that ring-like patterns - where the limit nuclear polarization is uniform - exhibit a non-decaying, externally-driven nuclear spin current.
  arXiv  Detail & Related papers  (2021-06-08T13:32:34Z)
• Selective Excitation of Subwavelength Atomic Clouds [0.0]
  A dense cloud of atoms with randomly changing positions exhibits coherent and incoherent scattering. We show that an atomic cloud of subwavelength dimensions can be modeled as a single scatterer where both coherent and incoherent components of the scattered photons can be fully explained.
  arXiv  Detail & Related papers  (2021-02-22T21:22:53Z)
• Non-reciprocal Cavity Polariton with Atoms Strongly Coupled to Optical Cavity [21.013802417752025]
  We experimentally demonstrate a chiral cavity QED system with multiple atoms strongly coupled to a Fabry-Perot cavity. By polarizing the internal quantum state of the atoms, the time-reversal symmetry of the atom-cavity interaction is broken. The strongly coupled atom-cavity system can be described by non-reciprocal quasiparticles, i.e., the cavity polariton.
  arXiv  Detail & Related papers  (2019-11-23T02:32:21Z)

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.