Correlation-Enhanced Interaction of a Bose-Einstein Condensate with Parametric Magnon Pairs and Virtual Magnons

Victor S. L'vov; Anna Pomyalov; Dmytro A. Bozhko; Burkard Hillebrands; Alexander A. Serga

doi:10.1103/PhysRevLett.131.156705

Correlation-Enhanced Interaction of a Bose-Einstein Condensate with Parametric Magnon Pairs and Virtual Magnons

Victor S. L'vov, Anna Pomyalov, Dmytro A. Bozhko, Burkard Hillebrands, Alexander A. Serga

Department of Chemical and Biological Physics

Research output: Contribution to journal › Article › peer-review

2 Citations (Scopus)

Abstract

Nonlinear interactions are crucial in science and engineering. Here, we investigate wave interactions in a highly nonlinear magnetic system driven by parametric pumping leading to Bose-Einstein condensation of spin-wave quanta—magnons. Using Brillouin light scattering spectroscopy in yttrium-iron garnet films, we found and identified a set of nonlinear processes resulting in off-resonant spin-wave excitations—virtual magnons. In particular, we discovered a dynamically strong, correlation-enhanced four-wave interaction process of the magnon condensate with pairs of parametric magnons having opposite wave vectors and fully correlated phases.

Original language	English
Article number	156705
Number of pages	7
Journal	Phys. Rev. Lett.
Volume	131
Issue number	15
DOIs	https://doi.org/10.1103/PhysRevLett.131.156705
Publication status	Published - 13 Oct 2023

Bibliographical note

This study was funded by the Deutsche Forschungsgemeinschaft (DFG, German Research Foundation)—TRR 173/2–268565370 Spin+X (Project B04). D. A. B. acknowledges support from Grant No. ECCS-2138236 from the National Science Foundation of the United States. V. S. L. was in part supported by NSF-BSF Grant No. 2020765. We thank R. Verba, P. Pirro, P. Sukhachov and M. Fleischhauer for fruitful discussions. P. Sukhachov and M. Fleischhauer for fruitful discussions.ges support from Grant No. ECCS-2138236 from the National Science Foundation of the United States. V. S. L. was in part supported by NSF-BSF Grant No. 2020765. We thank R. Verba, P. Pirro, P. Sukhachov and M. Fleischhauer for fruitful discussions.

All Science Journal Classification (ASJC) codes

General Physics and Astronomy

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10.1103/PhysRevLett.131.156705Licence: CC BY

https://arxiv.org/abs/2305.06896

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title = "Correlation-Enhanced Interaction of a Bose-Einstein Condensate with Parametric Magnon Pairs and Virtual Magnons",

abstract = "Nonlinear interactions are crucial in science and engineering. Here, we investigate wave interactions in a highly nonlinear magnetic system driven by parametric pumping leading to Bose-Einstein condensation of spin-wave quanta—magnons. Using Brillouin light scattering spectroscopy in yttrium-iron garnet films, we found and identified a set of nonlinear processes resulting in off-resonant spin-wave excitations—virtual magnons. In particular, we discovered a dynamically strong, correlation-enhanced four-wave interaction process of the magnon condensate with pairs of parametric magnons having opposite wave vectors and fully correlated phases.",

author = "L'vov, {Victor S.} and Anna Pomyalov and Bozhko, {Dmytro A.} and Burkard Hillebrands and Serga, {Alexander A.}",

note = "This study was funded by the Deutsche Forschungsgemeinschaft (DFG, German Research Foundation)—TRR 173/2–268565370 Spin+X (Project B04). D. A. B. acknowledges support from Grant No. ECCS-2138236 from the National Science Foundation of the United States. V. S. L. was in part supported by NSF-BSF Grant No. 2020765. We thank R. Verba, P. Pirro, P. Sukhachov and M. Fleischhauer for fruitful discussions. P. Sukhachov and M. Fleischhauer for fruitful discussions.ges support from Grant No. ECCS-2138236 from the National Science Foundation of the United States. V. S. L. was in part supported by NSF-BSF Grant No. 2020765. We thank R. Verba, P. Pirro, P. Sukhachov and M. Fleischhauer for fruitful discussions.",

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AU - Hillebrands, Burkard

AU - Serga, Alexander A.

N1 - This study was funded by the Deutsche Forschungsgemeinschaft (DFG, German Research Foundation)—TRR 173/2–268565370 Spin+X (Project B04). D. A. B. acknowledges support from Grant No. ECCS-2138236 from the National Science Foundation of the United States. V. S. L. was in part supported by NSF-BSF Grant No. 2020765. We thank R. Verba, P. Pirro, P. Sukhachov and M. Fleischhauer for fruitful discussions. P. Sukhachov and M. Fleischhauer for fruitful discussions.ges support from Grant No. ECCS-2138236 from the National Science Foundation of the United States. V. S. L. was in part supported by NSF-BSF Grant No. 2020765. We thank R. Verba, P. Pirro, P. Sukhachov and M. Fleischhauer for fruitful discussions.

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AB - Nonlinear interactions are crucial in science and engineering. Here, we investigate wave interactions in a highly nonlinear magnetic system driven by parametric pumping leading to Bose-Einstein condensation of spin-wave quanta—magnons. Using Brillouin light scattering spectroscopy in yttrium-iron garnet films, we found and identified a set of nonlinear processes resulting in off-resonant spin-wave excitations—virtual magnons. In particular, we discovered a dynamically strong, correlation-enhanced four-wave interaction process of the magnon condensate with pairs of parametric magnons having opposite wave vectors and fully correlated phases.

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Correlation-Enhanced Interaction of a Bose-Einstein Condensate with Parametric Magnon Pairs and Virtual Magnons

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