Optical Current, Momentum and Angular Momentum in Anisotropic Materials exposed to Detailed Balance
| Autor: | Bart van Tiggelen |
|---|---|
| Přispěvatelé: | Laboratoire de physique et modélisation des milieux condensés (LPM2C), Centre National de la Recherche Scientifique (CNRS)-Université Grenoble Alpes [2016-2019] (UGA [2016-2019]), Van Tiggelen, Bart |
| Jazyk: | angličtina |
| Rok vydání: | 2019 |
| Předmět: |
Angular momentum
FOS: Physical sciences 02 engineering and technology 01 natural sciences [PHYS] Physics [physics] Momentum symbols.namesake 020210 optoelectronics & photonics Vacuum energy [PHYS.COND.CM-GEN] Physics [physics]/Condensed Matter [cond-mat]/Other [cond-mat.other] 0103 physical sciences 0202 electrical engineering electronic engineering information engineering Radiative transfer 010306 general physics Equipartition theorem Physics [PHYS]Physics [physics] Atomic and Molecular Physics and Optics Magnetic field Maxwell's equations Quantum electrodynamics [PHYS.COND.CM-GEN]Physics [physics]/Condensed Matter [cond-mat]/Other [cond-mat.other] Poynting vector symbols Physics - Optics Optics (physics.optics) |
| Zdroj: | The European Physical Journal D : Atomic, molecular, optical and plasma physics The European Physical Journal D : Atomic, molecular, optical and plasma physics, EDP Sciences, In press |
| ISSN: | 1434-6060 1434-6079 |
| Popis: | International audience; This work investigates the theory behind a thought experiment that intends to measure momentum and angular momentum of matter exposed to "isotropic radiative noise". Radiative momentum has been a controversial subject for decades. The radiative momentum of isotropic noise is intuitively expected to be zero. We formulate the general features of the isotropic noise such as equipartition of energy and the vanishing of integrated Poynting vector. We demonstrate that in bi-anisotropic materials, a finite radiative momentum persists that performs work on the matter when its parameters change slowly. We find that Faraday rotation in the scattering of the radiative noise induces an angular momentum along the applied external magnetic field. Also, the Poynting vector is found to circulate around the matter, raising the question whether it really describes the energy flow. These effects are small and hard to measure in any real experiment. Yet, they are surprising predictions of the classical, macroscopic Maxwell equations, and make contact with the outcome of recent QED calculations done for the quantum vacuum. |
| Databáze: | OpenAIRE |
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