2016/02/17 by Yannick Hinschberger, Y. Hinschberger, Giovanni Manfredi +3
Computer Science · Physics and Astronomy · #Dirac equation #Electromagnetic field #Electromagnetic tensor #Electron #Hamiltonian (control theory) #Magnetic field #Maxwell's equations #Optical field #Pauli exclusion principle #Physics #Quantum Information and Cryptography #Quantum and electron transport phenomena #Quantum electrodynamics #Quantum mechanics #Quantum optics and atomic interactions #Spin (aerodynamics) #quant-ph
paper · pdf · doi:10.1103/physreva.93.042117
published as Phys. Rev. A 93, 042117 (2016)
arxiv created 2016/02/17 · openalex publication_date 2016/04/25 · arxiv updated 2016/05/04 · openalex created_date 2025/10/10 · openalex updated_date 2026/08/05
We present a self-consistent mean-field model based on a two-component Pauli-like equation that incorporates quantum and relativistic effects (up to second order in 1/c) for both external and internal electromagnetic fields. By taking the semirelativistic limit of the Dirac-Maxwell equations in the presence of an external electromagnetic field we obtain an analytical expression of a coherent light-induced mean-field Hamiltonian. The latter exhibits several mechanisms that involve the internal mean fields created by all the electrons and the external electromagnetic field (laser). The role played by the light-induced current density and the light-induced second-order charge density acting as sources in Maxwell's equations are clarified. In particular, we identify clearly four different mechanisms involving the spins that may play an important role in coherent ultrafast spin dynamics.