Numerical Analysis of the Magnetic Moment in S/F/S-Josephson Junction
DOI:
https://doi.org/10.70862/CSIR.2024.0102-07Keywords:
numerical analysis, Josephson junction, magnetic momentAbstract
One particularly intriguing object in superconductivity is the Josephson junction, which is an integral part of quantum computer hardware. Analysing this object requires solving differential equations. Such problems often cannot be solved with analytical methods; therefore, numerical methods and computational mathematics must be utilized. This article explores a fundamental model of the Josephson junction. The model presents the spatial coordinates of the magnetic moment as unknown functions dependent on time in a system of three ordinary differential equations with initial conditions. Comparative analysis of various methods is conducted for different sets of parameters. Optimal numerical methods for these particular instances of the problem are found. Visual results are also presented.
References
Borzì, A. (2020). Modelling with ordinary differential equations: a comprehensive approach. Chapman and Hall/CRC. https://doi.org/10.1201/9781351190398
Bobkov, G. A., Bobkova, I. V., & Bobkov, A. M. (2024). Controllable magnetic states in chains of coupled φ₀-Josephson junctions with ferromagnetic weak links. Physical Review B, 109(5), 054523. https://doi.org/10.1103/PhysRevB.109.054523
Nashaat, M., Kovalenko, E., & Shukrinov, Y. M. (2024). Buzdin, Shapiro, and chimera steps in φ₀-Josephson junctions. II. Bifurcation, switching, and hysteresis. Physical Review B, 110(2), 024510. https://doi.org/10.1103/PhysRevB.110.024510
Buzdin, A. (2008). Direct coupling between magnetism and superconducting current in the Josephson φ₀- junction. Physical review letters, 101(10), 107005. https://doi.org/10.1103/PhysRevLett.101.107005
Atanasova, P. K. H., Boyadjiev, T. L., Shukrinov, Y. U. M., Zemlyanaya, E. V., & Seidel, P. (2010). Influence of Josephson current second harmonic on stability of magnetic flux in long junctions. In Journal of Physics: Conference Series (Vol. 248, No. 1, p. 012044). IOP Publishing. https://doi.org/10.1088/1742-6596/248/1/012044
Atanasova, P. K., Zemlyanaya, E. V., & Shukrinov, Y. M. (2012). Interconnection between static regimes in the LJJs described by the double sine-Gordon equation. In Journal of Physics: Conference Series (Vol. 393, No. 1, p. 012023). IOP Publishing. https://doi.org/10.1088/1742-6596/393/1/012023
Shukrinov, Y. M., Rahmonov, I. R., Sengupta, K., & Buzdin, A. (2017). Magnetization reversal by superconducting current in φ Josephson junctions. Applied Physics Letters, 110(18). https://doi.org/10.1063/1.4983090
Atanasova, P. K., Panayotova, S. A., Zemlyanaya, E. V., Shukrinov, Y. M., & Rahmonov, I. R. (2019). Numerical simulation of the stiff system of equations within the spintronic model. In Numerical Methods and Applications: 9th International Conference, NMA 2018, Borovets, Bulgaria, August 20-24, 2018, Revised Selected Papers 9 (pp. 301-308). Springer International Publishing. https://doi.org/10.1007/978-3-030-10692-8_33
Atanasova, P., Panayotova, S., Shukrinov, Y., Rahmonov, I., & Zemlyanaya, E. (2018). User Software for Numerical Study of Josephson Junction with Magnetic Momenta. In EPJ Web of Conferences (Vol. 173, p. 05002). EDP Sciences. https://doi.org/10.1051/epjconf/201817305002
Wolfram, "Official website of Wolfram Mathematica," Wolfram, Jul. 5, 2024. [Online]. Available: https://www.wolfram.com/mathematica/.
Boyanov, B. & Semerdzhiev, H. (1988) Numerical Methods, Publ. Paisii Hilendarski University of Plovdiv.
Butcher, J. C. (1964). Implicit runge-kutta processes. Mathematics of computation, 18(85), 50-64. https://doi.org/10.2307/2003405
Hairer, E., Nørsett, S. P. & Wanner, G. (1987) Solving Ordinary Differential Equations I. Springer-Verlag. https://doi.org/10.1007/978-3-662-12607-3
Atanasova, P. K., Panayotova, S. A., Zemlyanaya, E. V., Shukrinov, Y. M., & Rahmonov, I. R. (2019). Numerical simulation of the stiff system of equations within the spintronic model. In Numerical Methods and Applications: 9th International Conference, NMA 2018, Borovets, Bulgaria, August 20-24, 2018, Revised Selected Papers 9 (pp. 301-308). Springer International Publishing. https://doi.org/10.1007/978-3-030-10692-8_33
Hall, G. G., & Watt, J. M. (1976). Modern numerical methods for ordinary differential equations. Oxford, U.K.: Clarendon Press.
Konschelle, F., & Buzdin, A. (2009). Magnetic moment manipulation by a Josephson current. Physical Review Letters, 102(1), 017001. https://doi.org/10.1103/PhysRevLett.102.017001
Atanasova, P. K., Boyadjiev, T. L., Shukrinov, Y. M., & Zemlyanaya, E. V. (2011). Numerical modeling of long Josephson junctions in the frame of double sine-Gordon equation. Mathematical Models and Computer Simulations, 3, 389-398. https://doi.org/10.1134/S2070048211030033
Atanasova, P. & Georgiev, V. (2023) Numerical solving of the sine-Gordon equation. In Proceedings of the International Scientific Conference “Informatics, Mathematics, Education and Their Applications” (IMEA 2023), Pamporovo, Bulgaria, Nov. 29–Dec. 1, 2023, Plovdiv University Press, pp. 23–30, ISBN: 978-619-7663-79-2.
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