Solving transcendental equations of physics with Chebyshev's method

Authors

DOI:

https://doi.org/10.55767/2451.6007.v34.n2.39487

Keywords:

Transcendental equations, Chebyshev, Mathematics, Physics, Root-finder

Abstract

In this work, physics teachers are provided with an optimized method to solve transcendental equations that cannot be solved algebraically and appear very often in higher education physics and engineering courses. The method is based on an interpolation with Chebyshev’s polynomials, and it is optimized for computational time, manageability, and accuracy. The method has been applied in specific problems of physics where transcendental equations appear, such as the compression of a real spring; the equation of a diode; the solution of the Schrödinger equation in a potential well; and the computing of cutoff wave numbers of a coaxial wire. The method is compared with others of the literature to check its correct behavior and the improvements that it presents. MATLAB source codes to implement the method and particular examples are also provided.

References

Aranzabal Olea, A. (2001). Modos de resolución de circuitos con diodos. Recuperado el 10 de agosto de 2022, de http://www.sc.ehu.es/sbweb/electronica/elec_basica/tema3/Paginas/Pagina6.htm

Austin, A., Kravanja, P. & Lloyd N., T. (2014). Numerical algorithms based on analytic function values at roots of unity. SIAM Journal on Numerical Analysis, 52(4), 1795-1821.

Bohm, D. (1989). Quantum Theory. New York: Dover.

Boyd, J. (2002). Computing zeros on a real interval through Chebyshev expansion and polynomial rootfinding. SIAM Journal on Numerical Analysis, 40(5), 1666-1682.

Boyd, J. (2014a). Finding the zeros of a univariative equation: Proxy rootfinders, Chebyshev interpolation and the com-panion matrix. Philadelphia, United States: Society for Industrial and Applied Mathematics.

Boyd, J. (2014b). Solving Transcendental Equations: The Chebyshev Polynomial Proxy and Other Numerical rootfinders, Perturbation Series, and Oracles. Philadelphia, PA, USA: Society for Industrial and Applied Mathematics (SIAM).

FCenRed. (2014, octubre 14). El pozo cuadrado finito. Física cuántica en la red. http://www.fisicacuantica.es/pozo-cuadrado-finito/

Galindo, A. y Pascual, P. (1989). Mecánica Cuántica. Madrid: Eudema.

Ma, D. (26 de Marzo de 2010). General Mathieu functions with arbitrary parameters V1.0. Recuperado el 2 de agosto de 2022, de: https://www.mathworks.com/matlabcentral/fileexchange/27101-general-mathieu-functions-with-arbitrary-parameters-v1-0

Morris, S. (29 de mayo de 2007). Real roots on interval. Recuperado el 2 de agosto de 2022, de https://www.mathworks.com/matlabcentral/fileexchange/15122- real-roots-on-interval

Peñaranda Foix, F. L. (2010). Números de onda de corte de los modos superiores TE y TM de un coaxial. https://riunet.upv.es/handle/10251/8070

Pozar, D. (1998). Microwave Engineering. New York: Wiley & Sons, Inc.

Quinga, S. (2021). Ecuaciones no lineales en física y su resolución mediante el uso de métodos iterativos multipaso de orden alto. Revista Enseñanza de la Física, 33(3), 145-165.

Sze, S. & Kwok, K. (2007). Physics of semiconductors devices. Taiwan: John Wiley & Sons, Inc.

Published

2022-11-29

How to Cite

Marqués Villarroya, D. (2022). Solving transcendental equations of physics with Chebyshev’s method. Journal of Physics Teaching, 34(2), 97–108. https://doi.org/10.55767/2451.6007.v34.n2.39487

Issue

Section

Essays and Special Topics