Therefore interaction Hamitonian of the single mode light field with the medium is proportional to the fourth power of the annihilation operator plus creationoperator.
因此，单模光场与此介质相互作用的哈密顿量正比于光场的湮灭算符与产生算符和的四次方。
2
Income investors were left to ponder Eurotunnel, the operator of the rail link between France and Britain, which will pay the first dividend since its creation in 1986.