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Why you should not use the electric field to quantize in nonlinear optics

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arxiv 1707.01686 v2 pith:HG37LMBP submitted 2017-07-06 quant-ph physics.optics

Why you should not use the electric field to quantize in nonlinear optics

classification quant-ph physics.optics
keywords electricfieldnonlinearconversionopticsannihilationbosoniccannot
verification ladder T0 review T1 audit T2 compute T3 formal T4 reserved
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We show that using the electric field as a quantization variable in nonlinear optics leads to incorrect expressions for the squeezing parameters in spontaneous parametric down-conversion and conversion rates in frequency conversion. This observation is related to the fact that if the electric field is written as a linear combination of bosonic creation and annihilation operators one cannot satisfy Maxwell's equations in a nonlinear dielectric.

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