The photomagnetonhat B^{left( 3 right)} and electrodynamic conservation lawsand electrodynamic conservation laws |
| |
Authors: | M. W. Evans |
| |
Affiliation: | 1. Department of Physics, University of North Carolina, 28223, Charlotte, North Carolina
|
| |
Abstract: | It is shown that the basic electrodynamical conservation laws are unaffected by the presence in free space of the photomagneton of light, $hat B^{left( 3 right)} = B^{left( 0 right)} hat J/rlap{--} h$ , the fundamental photon property responsible for magnetization by light. The expectation value $B^{left( 3 right)} = leftlangle {hat B^{left( 3 right)} } rightrangle $ does not affect the Poynting vector, so that it does not contribute to electromagnetic flux density. The electromagnetic energy density can be expressed in terms ofB (3) through the equation $$rlap{--} homega = frac{1}{{mu _0 }}smallint B^{left( 3 right)} cdot B^{left( 3 right) * } dV.$$ When light magnetizes matter, the unitB (3) of magnetic flux density per photon is transferred from light to matter. This is equivalent to an elastic transfer of angular momentum. Experimental indications for the existence ofB (3) are discussed. |
| |
Keywords: | |
本文献已被 SpringerLink 等数据库收录! |
|