Electromagnetic retarded interaction and symmetry violation of time reversal in high order stimulated radiation and absorption processes of light |
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Authors: | XiaoChun Mei |
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Institution: | (1) Department of Physics, Fuzhou University, Fuzhou, 350025, China |
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Abstract: | It has been proved that when the retarded effect (or multiple moment effect) of radiation fields is taken into account, the
high order stimulated radiation and stimulated absorption probabilities of light are not the same so that time reversal symmetry
would be violated, though the Hamiltonian of electromagnetic interaction is still unchanged under time reversal. The reason
to cause time reversal symmetry violation is that certain filial or partial transition processes of bound atoms are forbidden
or cannot be achieved due to the law of energy conservation and the special states of atoms themselves. These restrictions
would cause the symmetry violation of time reversal of other filial or partial transition processes which can be actualized
really. The symmetry violation is also relative to the asymmetry of initial states of bound atoms before and after time reversal.
For the electromagnetic interaction between non-bound atoms and radiation field, there is no such kind of symmetry violation
of time reversal. In this way, the current formula on the parameters of stimulated radiation and absorption of light with
time reversal symmetry should be revised. A more reliable foundation can be established for the theories of laser and nonlinear
optics in which non-equilibrium processes are involved. |
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Keywords: | quantum mechanics stimulated radiation and absorption of light retarded interaction time reversal symmetry violation laser nonlinear optics non-equilibrium processes |
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