Abstract:
The excitation of a magnon Bose–Einstein condensate in an yttrium iron garnet film due to acoustic coupling with the condensate in the second sample is experimentally studied. A nonlinear nature of this excitation is demonstrated. The formation of a phonon Bose–Einstein condensate in the substrate is assumed. This experiment opens the possibility of creating qubits based on acoustically interacting Bose–Einstein condensates.
This work was supported by the Russian Science Foundation (project no. 22-12-00322). The samples studied in this work were prepared at Vernadsky Crimean Federal University under the support of the Russian Ministry of Science and Higher Education (megagrant no. 075-15-2022-1108).
Citation:
G. A. Knyazev, A. N. Kuzmichev, P. E. Petrov, P. M. Vetoshko, V. I. Belotelov, Yu. M. Bunkov, “Acoustic coupling between magnon Bose–Einstein condensates in yttrium iron garnet films”, Pis'ma v Zh. Èksper. Teoret. Fiz., 118:8 (2023), 615–619; JETP Letters, 118:8 (2023), 603–607