Theory of quantum acoustomagnonics and acoustomechanics with a micromagnet
| Autor: | Jan Gieseler, Daniel Hümmer, Carlos Gonzalez-Ballestero, Oriol Romero-Isart |
|---|---|
| Jazyk: | angličtina |
| Předmět: |
Quantum Physics
Condensed Matter - Mesoscale and Nanoscale Physics Exploit Computer science FOS: Physical sciences 02 engineering and technology 021001 nanoscience & nanotechnology 01 natural sciences 3. Good health Condensed Matter::Materials Science Resonator Resource (project management) Mesoscale and Nanoscale Physics (cond-mat.mes-hall) 0103 physical sciences Electronic engineering Condensed Matter::Strongly Correlated Electrons Quantum Physics (quant-ph) 010306 general physics 0210 nano-technology Quantum |
| Zdroj: | Physical Review B |
| ISSN: | 2469-9969 2469-9950 |
| DOI: | 10.1103/physrevb.101.125404 |
| Popis: | Recently [1], we proposed a new way to engineer a flexible acoustomechanical coupling between the center-of-mass motion of an isolated micromagnet and one of its internal acoustic phonons by using a magnon as a passive mediator. In our approach, the coupling is enabled by the strong magnetoelastic interaction between magnons and acoustic phonons which originates from the small particle size. Here, we substantially extend our previous work. First, we provide the full theory of the quantum acoustomagnonic interaction in small micromagnets and analytically calculate the magnon-phonon coupling rates. Second, we fully derive the acoustomechanical Hamiltonian presented in Ref. [1]. Finally, we extend our previous results for the fundamental acoustic mode to higher order modes. Specifically, we show the cooling of the center-of-mass motion with a range of internal acoustic modes. Additionally, we derive the power spectral densities of the center-of-mass motion which allow to probe the same acoustic modes. Comment: 15 + 12 pages, 13 figures, 2 tables |
| Databáze: | OpenAIRE |
| Externí odkaz: |
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