Remarks on propagating waves in non-linear vacuum electrodynamics
arXiv:2212.05086 · doi:10.1140/epjc/s10052-023-11902-3
Abstract
Using the quadratic expansion in the photon fields of Euler-Heisenberg (EH) non-linear electrodynamics (NLED) Lagrangian model we study relevant vacuum properties in a scenario involving the propagation of a photon probe in the presence of a background constant and static magnetic field, . We compute the gauge invariant, symmetric and conserved energy-momentum tensor (EMT) and angular momentum tensor (AMT) for arbitrary magnetic field strength using the Hilbert method under the soft-photon approximation. We discuss how the presence of magneto-electric terms in the EH Lagrangian is a source of anisotropy, induce the non-zero trace in the EMT and leads to differences between EMT calculated by the Hilbert or Noether method. From the Hilbert EMT we analyze some quantities of interest such as the energy density, pressures, Poynting vector, and angular momentum vector, comparing and discussing the differences with respect to the improved Noether method. The magnetized vacuum properties are also studied showing that a photon effective magnetic moment can be defined for different polarization modes. The calculations are done in terms of derivatives of the two scalar invariants of electrodynamics, hence, extension to other NLED Lagrangian is straightforward. We discuss further physical implications and experimental strategies to test magnetization, photon pressure, and effective magnetic moment.
16 pages, 3 figures, matches published version
References in corpus (15)
- Physics of Strongly Magnetized Neutron Stars
- New PVLAS results and limits on magnetically induced optical rotation and ellipticity in vacuum
- Effective Lagrangian in nonlinear electrodynamics and its properties of causality and unitarity
- (In-)Significance of the Anomalous Magnetic Moment of Charged Fermions for the Equation of State of a Magnetized and Dense Medium
- A systematic study of magnetic field in Relativistic Heavy-ion Collisions in the RHIC and LHC energy regions
- Probing vacuum polarization effects with high-intensity lasers
- Nonlinear phase shift from photon-photon scattering in vacuum
- Vacuum birefringence at x-ray free-electron lasers
- Magnetic susceptibility and magnetization properties of asymmetric nuclear matter under a strong magnetic field
- QED with external field: Hamiltonian treatment for anisotropic medium formed by the Lorentz-non-invariant vacuum
- Noether and Hilbert (metric) energy-momentum tensors are not, in general, equivalent
- Is the photon paramagnetic?
- Towards a direct measurement of the quantum vacuum Lagrangian coupling coefficients using two counter propagating super-intense laser pulses
- Inverse Cotton-Mouton effect of the Vacuum and of atomic systems
- Polarization-dependent heating of the cosmic microwave background radiation by a magnetic field