tarazkar_2014b ============== M\. Tarazkar, D\. A\. Romanov and R\. J\. Levis, "Higher\-order nonlinearity of refractive index\: The case of argon", J\. Chem\. Phys\. 140, 214316 \(2014\) `Source record `__ · :doc:`Catalogue ` · :doc:`Review register ` DOI: `10\.1063/1\.4880716 `__ **Source kind:** theory **Recorded technique:** CCSD/t\-aug\-cc\-pV5Z cubic response \(DALTON\) of Ar with an auxiliary static field, quadratic fits in the field giving the fourth\-order \(fifth\-order response\) hyperpolarizabilities; approximate relations between processes from Bishop's and Hattig's frequency expansions\. **Materials in structured entries:** None recorded. **Dataset quantities:** None recorded. **Contents:** 0 datasets; 0 formulas. Curation notes -------------- Pdf page 1 is the publisher's cover; the article is pdf pages 2\-10 \(pages 214316\-1 to \-9\)\. Argon only\. NOTHING IS EXTRACTED\: the conventional gamma \(their gamma^\(2\)\) of Ar appears only in Fig\. 1 \(DFWM dispersion\) and in the supplementary Table S2 \(not in the library\); the tables give only the fourth\-order gamma^\(4\) \(Tables I\-III\), which has no vocabulary quantity \(higher\-order Kerr\: notes only\)\. Convention as tarazkar\_2014 \(the same Eqs\. 1, 4\: T\)\. RELATIONS FOR THE KERR COEFFICIENT \(pdf pages 7\-8\)\. Eq\. \(19\)\: gamma^\(2\)\(\-w; w, \-w, w\) ~ \(1/3\) gamma^\(2\)\(\-2w; w, w, 0\) \+ gamma^\(2\)\(\-w; w, 0, 0\) \- \(1/3\) gamma^\(2\)\(0; 0, 0, 0\), the DFWM \(Kerr\) gamma from ESHG, dc Kerr and static values; it reproduces the quadratic term of the Bishop expansion exactly \(Eqs\. 20\-23\) and agrees with direct CCSD DFWM values of Ar to 0\.2\-3 % at 400\-300 nm \(better at longer wavelengths\)\. The formula used by Wahlstrand et al\. \(Ref\. 21, their Eq\. 13\), gamma\_DFWM\(w\) = gamma\_ESHG\(w\) \[gamma\_ESHG\(0\) / gamma\_ESHG\(w\)\]^\(2/3\), deviates by 9\.3 %, 14 % and 24 % at 500, 400 and 300 nm\: 'the exponent \.\.\. should be 1/3 rather than 2/3' \(pdf page 8\)\. \(This bears on the wahlstrand\_2012 records\.\) HIGHER ORDER \(notes only\)\: the DSWM coefficient of Ar \(Table III, 10^6 a\.u\.\)\: 16\.514 \+\- 0\.500 \(300 nm\) \.\.\. 2\.607 \+\- 0\.027 \(800 nm\) \.\.\. 2\.133 \+\- 0\.020 \(2000 nm\); n4 \(cm^4/W^2\) = 4\.02 x 10^\-40 gamma^\(4\)\_DSWM \(a\.u\.\) \(Eq\. 24\); 'In the infrared limit \.\.\. n4 = 8\.25 x 10^\-10 cm^4/TW^2' \(the library's text renders the argument as 'w \-\> infinity'; the equation image was not checked\), against the Kramers\-Kronig 2 x 10^\-12 and Loriot et al\.'s \-0\.36 \+\- 1\.03 x 10^\-9 cm^4/TW^2\: n4 of Ar is positive at 300\-2000 nm \(pdf page 9\)\. **Recorded bibliographic identity status:** VALIDATED. This concerns identification of the source; it does not establish the scientific correctness of its contents. Datasets -------- No datasets are recorded. Formulas -------- No formulas are recorded. Corrections ----------- No dataset errata are recorded in this source record. Formula corrections, where recorded, appear with their formulas above. Curation notes may also discuss corrections or unresolved interpretation. Consult the :doc:`review register ` for the checks and decisions.