• Generalized Freud’s equation and level densities with polynomial potential

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      https://www.ias.ac.in/article/fulltext/pram/081/02/0189-0202

    • Keywords

       

      Orthogonal polynomial; Freud’s equation; Dyson–Mehta method; methods of resolvents; level density.

    • Abstract

       

      Orthogonal polynomials with weight exp[$−NV (x)$] are studied where $V (x) = \sum_{k=1}^{d} a_{2k} x^{2k}$ is a polynomial of order $2d$. The generalized Freud’s equations for $d = 3, 4$ and 5 are derived and using this $R_{\mu} = h_{\mu} / h{\mu−1}$ is obtained, where $h_{\mu}$ is the normalization constant for the corresponding orthogonal polynomials. Moments of the density functions, expressed in terms of $R_{\mu}$ , are obtained using Freud’s equation and using this, explicit results of level densities as $N \rightarrow \infty$ are derived using the method of resolvents. The results are compared with those using Dyson–Mehta method.

    • Author Affiliations

       

      Akshat Boobna1 Saugata Ghosh1

      1. The Creative School, E-791, C.R. Park, New Delhi 110 017, India
    • Dates

       
  • Pramana – Journal of Physics | News

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