Spontaneous generation of spin current from the vacuum by strong electric fields
arXiv:1904.07593 · doi:10.1093/ptep/ptz112
Abstract
We discuss spontaneous spin current generation from the vacuum by strong electric fields as a result of interplay between the Schwinger mechanism and a spin-orbit coupling. By considering a homogeneous slow strong electric field superimposed by a fast weak transverse electric field, we explicitly evaluate the vacuum expectation value of a spin current (the Bargmann-Wigner spin current) by numerically solving the Dirac equation. We show that a non-vanishing spin current polarized in the direction perpendicular to the electric fields flows mostly in the longitudinal direction. We also find that a relativistic effect due to the helicity conservation affects direction/polarization of spin current.
v2: 16 pages, 5 figures; discussions and references added
References in corpus (6)
- Dynamically assisted Schwinger mechanism
- Barrier control in tunneling e^+ e^- photoproduction
- Interband Effects of Magnetic Field on Hall Effects for Dirac Electrons in Bismuth
- Sauter-Schwinger pair creation dynamically assisted by a plane wave
- Franz-Keldysh effect in strong-field QED
- Spin-dependent dynamically assisted Schwinger mechanism
Cited by in corpus (5)
- Chirality Production with Mass Effects-Schwinger Pair Production and the Axial Ward Identity
- Dynamically assisted Schwinger mechanism and chirality production in parallel electromagnetic field
- Estimation of electric field in intermediate-energy heavy-ion collisions
- Induced Quantized Spin Current in Vacuum
- Mutual assistance between the Schwinger mechanism and the dynamical Casimir effect