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Nonlinear magnetization dynamics in Bose-Einstein condensation of magnons
- Authors: Gasanov A.D.1,2, Matveev A.A.1,2, Safin A.R.1,3, Nikitov S.A.1,2,4
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Affiliations:
- Kotelnikov Institute of Radioengineering and Electronics of RAS
- Moscow Institute of Physics and Technology (National Research University)
- National Research University “Moscow Power Engineering Institute”
- Saratov National Research State University named after N.G. Chernyshevsky
- Issue: Vol 70, No 4 (2025)
- Pages: 376-383
- Section: TO THE 70th ANNIVERSARY OF S.A. NIKITOV
- URL: https://ter-arkhiv.ru/0033-8494/article/view/687501
- DOI: https://doi.org/10.31857/S0033849425040078
- EDN: https://elibrary.ru/FSHHOC
- ID: 687501
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Abstract
An equation for the dynamics of a Bose-Einstein condensate of magnons in a ferromagnetic film is presented, derived from quantum mechanical theory. The main interactions influencing the evolution of the condensed state are considered. An autonomous system of first-order differential equations describing the amplitude and phase of condensed magnons is obtained from the equation for their annihilation operator. The phase trajectories of such a system are investigated using the method of constructing phase portraits and determining the stability of stationary points.
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About the authors
A. D. Gasanov
Kotelnikov Institute of Radioengineering and Electronics of RAS; Moscow Institute of Physics and Technology (National Research University)
Author for correspondence.
Email: gasanov.ad@phystech.edu
Russian Federation, Mokhovaya Str. 11, build. 7, Moscow, 125009; Institutskiy lane, 9, Dolgoprudny, Moscow region, 141701
A. A. Matveev
Kotelnikov Institute of Radioengineering and Electronics of RAS; Moscow Institute of Physics and Technology (National Research University)
Email: gasanov.ad@phystech.edu
Russian Federation, Mokhovaya Str. 11, build. 7, Moscow, 125009; Institutskiy lane, 9, Dolgoprudny, Moscow region, 141701
A. R. Safin
Kotelnikov Institute of Radioengineering and Electronics of RAS; National Research University “Moscow Power Engineering Institute”
Email: gasanov.ad@phystech.edu
Russian Federation, Mokhovaya Str. 11, build. 7, Moscow, 125009; Krasnokazarmennaya Str., 14, Moscow, 111250
S. A. Nikitov
Kotelnikov Institute of Radioengineering and Electronics of RAS; Moscow Institute of Physics and Technology (National Research University); Saratov National Research State University named after N.G. Chernyshevsky
Email: gasanov.ad@phystech.edu
Russian Federation, Mokhovaya Str. 11, build. 7, Moscow, 125009; Institutskiy lane, 9, Dolgoprudny, Moscow region, 141701; Astrakhanskaya Str., 83, Saratov, 410004
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