Acta Optica Sinica, Volume. 6, Issue 4, 339(1986)
Investigation of the simplified diagrammatic representation of high-order nonlinear optical susceptibility
The method to merge the diagrammatic representation of density matrix to the simplest form is deduced. In this way it is quite enough that the nth-susceptibility could be expressed only by n + 1 diagrams, and microchannel number in every term of suseeptibility could be obtained simultaneously.
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WU QUN, GUO YILI, ZHOU BINGKUN. Investigation of the simplified diagrammatic representation of high-order nonlinear optical susceptibility[J]. Acta Optica Sinica, 1986, 6(4): 339