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Part of the book series: SpringerBriefs in Molecular Science ((BRIEFSMAGNET))

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Abstract

The chapter deals with properties of the response functions. It starts with causality and then examines symmetries. Next, Quantum Field Theory formalism is applied to underline the quantum nature of the hyperpolarizabilities extracted from time-dependent simulations. The chapter ends with the diagrammatic rules for calculation of hyperpolarizabilities.

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Notes

  1. 1.

    Both \(P(t)\) and \(E(t)\) are assumed to be observable (i.e. real).

  2. 2.

    The proof of these relations could be found in [1].

  3. 3.

    In depth discussion of this subject could be found in [3].

References

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  3. Y.R. Shen, The Principles of Nonlinear Optics (Wiley-Interscience, New York, 2001)

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  4. R.W. Boyd, Nonlinear Optics (Elsevier, New York, 2008)

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  5. A. Fetter, J. Walecka, Quantum Theory of Many-Particle Systems (McGraw-Hill, San Francisco, 1971)

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  6. N.B. Delone, V.P. Krainov, Atoms in Strong Light Fields (Springer, Berlin, 1985)

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  7. N.B. Delone, V.P. Krainov, Fundamentals of Nonlinear Optics of Atomic Gases (Wiley, New York, 1988)

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Correspondence to Vladimir Goncharov .

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Goncharov, V. (2014). Response Functions. In: Non-Linear Optical Response in Atoms, Molecules and Clusters. SpringerBriefs in Molecular Science(). Springer, Cham. https://doi.org/10.1007/978-3-319-08320-9_2

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