Adaptation of Fluctuating Magnetoacoustic System to External Signals
| Autor: | Michael E. McConney, Diana Berman, Michael R. Page, Derek A. Bas, Vladimir L. Safonov, Yuri V. Rostovtsev, James A. Roberts |
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| Rok vydání: | 2021 |
| Předmět: |
Phase transition
General Computer Science fluctuations Thermal fluctuations 02 engineering and technology Bose-Einstein condensation 01 natural sciences Signal magnetoacoustic 0103 physical sciences General Materials Science Adaptation 010306 general physics Quantum Physics microwave signal General Engineering 021001 nanoscience & nanotechnology self-organization TK1-9971 Computational physics Nonlinear system Modulation Excited state Electrical engineering. Electronics. Nuclear engineering Radio frequency 0210 nano-technology |
| Zdroj: | IEEE Access, Vol 9, Pp 80847-80853 (2021) |
| ISSN: | 2169-3536 |
| Popis: | The adaptation of systems to external influences is of broad interest. We study the influence of microwave signals of different shapes on the magnetoacoustic wave system with a giant nonlinearity in canted antiferromagnet FeBO3 at room temperature, which is close to its phase transition to the paramagnetic state. The classical nonlinear system obeys external deterministic signals; the modulation response describes the shape of these signals. In response to a noisy spectrum, the system shows self-organization, and mode competition selects one excited mode while suppressing others. With an increase in the power of the external signal, another self-organization is observed in the form of a narrow peak at the frequency of the fundamental minimum. This represents the first observation of the macroscopic quantum statistical phenomenon, Bose-Einstein condensation of magnetoacoustic wave quanta in a wave system with a high level of thermal fluctuations. The resulting picture of adaptation can analogously be transferred to many other adaptive wave systems, including large scale adaptive wave systems in the natural environment. |
| Databáze: | OpenAIRE |
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