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IEEE Photonics Technology Letters

Comments on the “Second-Harmonic Generation Investigated by Topless Potential Well With Inverse Square Root”

Tigran A. Ishkhanyan, Artur Mikhailovich Ishkhanyan

Published Mar 11, 2020• 1 citation
Publisher

Abstract

We reveal several errors in a recent article by Q. Yu, K. Guo, M. Hu, and Z. Zhang “Second-harmonic generation investigated by topless potential well with inverse square root”, IEEE Photonics Technology Letters 31, 693-696 (2019)”. The mistakes are crucial and concern all parts of the article. As a result, the whole discussion is misleading, all the results reported are incorrect, and, hence, the article has no scientific value.

DOI
10.1109/lpt.2020.2979963

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We reveal several errors in a recent article by Q. Yu, K. Guo, M. Hu, and Z. Zhang “Second-harmonic generation investigated by topless potential well with inverse square root”, IEEE Photonics Technology Letters 31, 693-696 (2019)”. The mistakes are crucial and concern all parts of the article. As a result, the whole discussion is misleading, all the results reported are incorrect, and, hence, the article has no scientific value.
This thesis is devoted to the study of various examples of exactly solved quantum many-body systems in one-dimension. It is divided into two parts: the first provides background and complementary results to the second, which consists of three scientific papers. The first paper concerns a particu- lar extension, corresponding to the root system CN, of the delta-interaction model. We prove by construction that its exact solution, even in the gen- eral case of distinguishable particles, can be obtained by the coordinate Bethe ansatz. We also elaborate on the physical interpretation of this model. It is well known that the delta-interaction is included in a four parameter family of local interactions. In the second paper we interpret these parameters as cou- pling constants of certain momentum dependent interactions and determine all cases leading to a many-body system of distinguishable particles which can be solved by the coordinate Bethe ansatz. In the third paper we consider the so-called rational Calogero-Sutherland model, describing an arbitrary number of particles on the real line, confined by a harmonic oscillator potential and interacting via a two-body interaction proportional to the inverse square of the inter-particle distance. We construct a novel solution algorithm for this model which enables us to obtain explicit formulas for its eigenfunctions. We also show that our algorithm applies, with minor changes, to all extensions of the rational Calogero-Sutherland model which correspond to a classical root system.
Photonic generation of RF and microwave signal with relative frequency instability of 10−15{10}^{-15}10−15